Merge pull request #3423 from Multiverse/fix/placeholder-null

Fix null error when world name for non-player placeholders not specified

.github/workflows/generic.checkstyle.yml

@@ -11,9 +11,9 @@ jobs:
       pull-requests: write
     continue-on-error: true
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
 
-      - uses: dbelyaev/action-checkstyle@v0.8.4
+      - uses: dbelyaev/action-checkstyle@v3
         continue-on-error: true
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/generic.platform_uploads.yml

@@ -107,9 +107,9 @@ jobs:
         files: '["${{ github.workspace }}/${{ inputs.plugin_name }}-${{ steps.release-info.outputs.tag_name }}.jar"]'
         name: ${{ steps.release-info.outputs.tag_name }}
         changelog: ${{ steps.release-artifact.outputs.body }}
-        game_versions: 1.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4, 1.21.3, 1.21.2, 1.21.1, 1.21, 1.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2
+        game_versions: 1.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4, 1.21.3, 1.21.2, 1.21.1, 1.21, 1.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2
         version_type: ${{ steps.parse-release-type.outputs.release_type }}
-        loaders: bukkit, spigot, paper
+        loaders: bukkit, spigot, paper, purpur
         dependencies: ${{ inputs.modrinth_dependencies }}
 
     - name: Upload to DBO
@@ -121,7 +121,7 @@ jobs:
         changelog: ${{ steps.release-artifact.outputs.body }}
         changelog_type: markdown
         display_name: ${{ steps.release-info.outputs.tag_name }}
-        game_versions: 1.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4, 1.21.3, 1.21.2, 1.21.1, 1.21, 1.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2
+        game_versions: 1.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4, 1.21.3, 1.21.2, 1.21.1, 1.21, 1.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2
         release_type: ${{ steps.parse-release-type.outputs.release_type }}
         project_relations: ${{ inputs.dbo_project_relations }}
         file_path: ${{ github.workspace }}/${{ inputs.plugin_name }}-${{ steps.release-info.outputs.tag_name }}.jar
@@ -136,5 +136,5 @@ jobs:
         channel: ${{ steps.parse-release-type.outputs.release_type }}
         files: '[{"path": "${{ github.workspace }}/${{ inputs.plugin_name }}-${{ steps.release-info.outputs.tag_name }}.jar", "platforms": ["PAPER"]}]'
         description: ${{ steps.release-artifact.outputs.body }}
-        platform_dependencies: '{"PAPER": ["1.18.2-1.21.8"]}'
+        platform_dependencies: '{"PAPER": ["1.18.2-1.21.11"]}'
         plugin_dependencies: ${{ inputs.hangar_plugin_dependencies }}

build.gradle

@@ -1,7 +1,7 @@
 import org.apache.tools.ant.filters.ReplaceTokens
 
 plugins {
-    id 'org.mvplugins.multiverse-plugin' version '1.2.0'
+    id 'org.mvplugins.multiverse-plugin' version '1.2.2'
 }
 
 group = 'org.mvplugins.multiverse.core'
@@ -25,9 +25,9 @@ repositories {
 }
 
 configure(apiDependencies) {
-    serverApiVersion = '1.19.4-R0.1-SNAPSHOT'
+    serverApiVersion = '1.21.11-R0.1-SNAPSHOT'
     mockBukkitServerApiVersion = '1.21'
-    mockBukkitVersion = '4.31.1'
+    mockBukkitVersion = '4.100.0'
 }
 
 dependencies {
@@ -48,9 +48,9 @@ dependencies {
     }
 
     // Utils
-    shadowed 'io.vavr:vavr:0.10.4'
-    shadowed 'org.glassfish.hk2:hk2-locator:3.0.3'
-    shadowed('org.glassfish.hk2:hk2-inhabitant-generator:3.0.3') {
+    shadowed 'io.vavr:vavr:0.10.7'
+    shadowed 'org.glassfish.hk2:hk2-locator:3.1.1'
+    shadowed('org.glassfish.hk2:hk2-inhabitant-generator:3.1.1') {
         exclude group: 'org.apache.maven', module: 'maven-core'
     }
     shadowed('com.dumptruckman.minecraft:Logging:1.1.1') {
@@ -60,8 +60,8 @@ dependencies {
     shadowed('org.bstats:bstats-bukkit:3.1.0') {
         exclude group: 'org.bukkit', module: 'bukkit'
     }
-    shadowed 'net.minidev:json-smart:2.4.9'
-    shadowed 'org.jetbrains:annotations:22.0.0'
+    shadowed 'net.minidev:json-smart:2.5.2'
+    shadowed 'org.jetbrains:annotations:26.0.2'
     shadowed 'io.papermc:paperlib:1.0.8'
 
     // Tests

src/main/java/org/mvplugins/multiverse/core/MultiverseCore.java

@@ -124,9 +124,9 @@ public class MultiverseCore extends MultiverseModule {
     public void onDisable() {
         super.onDisable();
         MultiverseCoreApi.shutdown();
-        saveAllConfigs();
         shutdownDependencyInjection();
         PluginServiceLocatorFactory.get().shutdown();
+        Logging.info("- Disabled");
         Logging.shutdown();
     }
 
@@ -215,11 +215,11 @@ public class MultiverseCore extends MultiverseModule {
      */
     private Try<Void> saveAllConfigs() {
         return configProvider.get().save()
-                .flatMap(ignore -> worldManagerProvider.get().saveWorldsConfig())
-                .flatMap(ignore ->anchorManagerProvider.get().saveAllAnchors())
-                .onFailure(e -> {
-                    Logging.severe("Failed to save configs, things may not work as expected.");
-                });
+                .andThenTry(() -> worldManagerProvider.get().saveWorldsConfig())
+                .andThenTry(() -> anchorManagerProvider.get().saveAllAnchors())
+                .onFailure(e ->
+                        Logging.severe("Failed to save all configs, things may not work as expected. %s",
+                                e.getLocalizedMessage()));
     }
 
     /**

src/main/java/org/mvplugins/multiverse/core/PlaceholderExpansionHook.java

@@ -13,27 +13,33 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jvnet.hk2.annotations.Service;
 
+import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.economy.MVEconomist;
 import org.mvplugins.multiverse.core.utils.MinecraftTimeFormatter;
 import org.mvplugins.multiverse.core.utils.REPatterns;
 import org.mvplugins.multiverse.core.utils.StringFormatter;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
+import org.mvplugins.multiverse.core.world.MultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
 
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
+import java.util.Locale;
 
 @Service
 final class PlaceholderExpansionHook extends PlaceholderExpansion {
 
     private final MultiverseCore plugin;
+    private final CoreConfig coreConfig;
     private final WorldManager worldManager;
     private final MVEconomist economist;
 
     @Inject
-    public PlaceholderExpansionHook(MultiverseCore plugin, WorldManager worldManager, MVEconomist economist) {
+    public PlaceholderExpansionHook(@NotNull MultiverseCore plugin,
+                                    @NotNull CoreConfig coreConfig,
+                                    @NotNull WorldManager worldManager,
+                                    @NotNull MVEconomist economist) {
         this.plugin = plugin;
+        this.coreConfig = coreConfig;
         this.worldManager = worldManager;
         this.economist = economist;
     }
@@ -44,6 +50,13 @@ final class PlaceholderExpansionHook extends PlaceholderExpansion {
         return super.register();
     }
 
+    @Override
+    public void warning(String msg) {
+        if (coreConfig.getWarnInvalidPapiFormat()) {
+            super.warning(msg);
+        }
+    }
+
     @Override
     public @NotNull String getIdentifier() {
         return "multiverse-core";
@@ -82,130 +95,101 @@ final class PlaceholderExpansionHook extends PlaceholderExpansion {
             return null;
         }
 
-        final var placeholder = paramsArray.removeFirst();
+        final var placeholder = paramsArray.remove(0).toLowerCase(Locale.ENGLISH);
 
-        String worldName = parseWorldName(offlinePlayer, paramsArray);
-        if (worldName == null) return null;
-
-        return worldManager.getLoadedWorld(worldName)
-                .onEmpty(() -> warning("Multiverse World not found: " + worldName))
-                .map(world -> getWorldPlaceHolderValue(placeholder, paramsArray, world))
-                .getOrNull();
+        return parseWorldName(offlinePlayer, paramsArray)
+                .flatMap(worldName -> worldManager.getWorld(worldName)
+                    .onEmpty(() -> warning("Multiverse World not found: " + worldName)))
+                .flatMap(world -> world.asLoadedWorld()
+                        .flatMap(loadedWorld -> getLoadedWorldPlaceHolderValue(placeholder, paramsArray, loadedWorld))
+                        .orElse(() -> getWorldPlaceHolderValue(placeholder, paramsArray, world)))
+                .getOrElse(() -> coreConfig.getInvalidPapiFormatReturnsBlank() ? "" : null);
     }
 
-    private @Nullable String parseWorldName(OfflinePlayer offlinePlayer, List<String> paramsArray) {
+    private @NotNull Option<String> parseWorldName(OfflinePlayer offlinePlayer, List<String> paramsArray) {
         // No world defined, get from player
         if (paramsArray.isEmpty()) {
             if (offlinePlayer instanceof Player player) {
-                return player.getWorld().getName();
+                return Option.of(player.getWorld().getName());
             } else {
                 warning("You must specify a world name for non-player placeholders");
-                return null;
+                return Option.none();
             }
         }
 
         // Try get from params
-        String paramWorldName = paramsArray.getLast();
-        if (worldManager.isLoadedWorld(paramWorldName)) {
-            paramsArray.removeLast();
-            return paramWorldName;
+        String paramWorldName = paramsArray.get(paramsArray.size() - 1);
+        if (worldManager.isWorld(paramWorldName)) {
+            paramsArray.remove(paramsArray.size() - 1);
+            return Option.of(paramWorldName);
         }
 
         // Param not a world, fallback to player
         if (offlinePlayer instanceof Player player) {
-            return player.getWorld().getName();
+            return Option.of(player.getWorld().getName());
         }
         warning("Multiverse World not found: " + paramWorldName);
-        return null;
+        return Option.none();
     }
 
-    private @Nullable String getWorldPlaceHolderValue(@NotNull String placeholder,
-                                                      @NotNull List<String> placeholderParams,
-                                                      @NotNull LoadedMultiverseWorld world) {
-        // Switch to find what specific placeholder we want
-        switch (placeholder.toLowerCase()) {
-            case "alias" -> {
-                return world.getAliasOrName();
-            }
-            case "animalspawn" -> {
-                return String.valueOf(world.getEntitySpawnConfig().getSpawnCategoryConfig(SpawnCategory.ANIMAL).isSpawn());
-            }
-            case "autoheal" -> {
-                return String.valueOf(world.getAutoHeal());
-            }
-            case "blacklist" -> {
-                return String.join(", ", world.getWorldBlacklist());
-            }
-            case "currency" -> {
-                return String.valueOf(world.getCurrency());
-            }
-            case "difficulty" -> {
-                return world.getDifficulty().toString();
-            }
-            case "entryfee" -> {
-                return economist.formatPrice(world.getPrice(), world.getCurrency());
-            }
-            case "environment" -> {
-                return world.getEnvironment().toString().toLowerCase();
-            }
-            case "flight" -> {
-                return String.valueOf(world.isAllowFlight());
-            }
-            case "gamemode" -> {
-                return world.getGameMode().toString().toLowerCase();
-            }
-            case "generator" -> {
-                return world.getGenerator();
-            }
-            case "hunger" -> {
-                return String.valueOf(world.isHunger());
-            }
-            case "monstersspawn" -> {
-                return String.valueOf(world.getEntitySpawnConfig().getSpawnCategoryConfig(SpawnCategory.MONSTER).isSpawn());
-            }
-            case "name" -> {
-                return world.getName();
-            }
-            case "playerlimit" -> {
-                return String.valueOf(world.getPlayerLimit());
-            }
-            case "price" -> {
-                return String.valueOf(world.getPrice());
-            }
-            case "pvp" -> {
-                return String.valueOf(world.getPvp());
-            }
-            case "seed" -> {
-                return String.valueOf(world.getSeed());
-            }
-            case "time" -> {
-                String timeFormat = !placeholderParams.isEmpty() ? placeholderParams.getFirst() : "";
-                long time = world.getBukkitWorld().map(World::getTime).getOrElse(0L);
-                switch (timeFormat) {
-                    case "" -> {
-                        return String.valueOf(time);
-                    }
-                    case "12h" -> {
-                        return MinecraftTimeFormatter.format12h(time);
-                    }
-                    case "24h" -> {
-                        return MinecraftTimeFormatter.format24h(time);
-                    }
-                    default -> {
-                        return MinecraftTimeFormatter.formatTime(time, timeFormat);
-                    }
-                }
-            }
-            case "type" -> {
-                return world.getBukkitWorld().map(World::getWorldType).map(Enum::name).getOrElse("null");
-            }
-            case "weather" -> {
-                return String.valueOf(world.isAllowWeather());
+    private @NotNull Option<String> getWorldPlaceHolderValue(@NotNull String placeholder,
+                                                             @NotNull List<String> placeholderParams,
+                                                             @NotNull MultiverseWorld world) {
+        return Option.of(switch (placeholder) {
+            case "alias" -> world.getAliasOrName();
+            case "animalspawn" -> String.valueOf(world.getEntitySpawnConfig()
+                    .getSpawnCategoryConfig(SpawnCategory.ANIMAL)
+                    .isSpawn());
+            case "autoheal" -> String.valueOf(world.getAutoHeal());
+            case "blacklist" -> String.join(", ", world.getWorldBlacklist());
+            case "currency" -> String.valueOf(world.getCurrency());
+            case "difficulty" -> world.getDifficulty().toString();
+            case "entryfee" -> economist.formatPrice(world.getPrice(), world.getCurrency());
+            case "environment" -> world.getEnvironment().toString().toLowerCase();
+            case "flight" -> String.valueOf(world.isAllowFlight());
+            case "gamemode" -> world.getGameMode().toString().toLowerCase();
+            case "generator" -> world.getGenerator();
+            case "hunger" -> String.valueOf(world.isHunger());
+            case "monstersspawn" -> String.valueOf(world.getEntitySpawnConfig()
+                    .getSpawnCategoryConfig(SpawnCategory.MONSTER)
+                    .isSpawn());
+            case "name" -> world.getName();
+            case "playerlimit" -> String.valueOf(world.getPlayerLimit());
+            case "price" -> String.valueOf(world.getPrice());
+            case "pvp" -> String.valueOf(world.getPvp());
+            case "seed" -> String.valueOf(world.getSeed());
+            case "weather" -> String.valueOf(world.isAllowWeather());
+            case "playercount", "time", "type" -> {
+                warning("Placeholder '" + placeholder + "' is only available for loaded worlds.");
+                yield null;
             }
             default -> {
-                warning("Unknown placeholder: " + placeholder);
-                return null;
+                warning("Unknown Placeholder: " + placeholder);
+                yield null;
             }
-        }
+        });
+    }
+
+    private @NotNull Option<String> getLoadedWorldPlaceHolderValue(@NotNull String placeholder,
+                                                                   @NotNull List<String> placeholderParams,
+                                                                   @NotNull LoadedMultiverseWorld world) {
+        return Option.of(switch (placeholder) {
+            case "playercount" -> String.valueOf(world.getBukkitWorld()
+                    .map(World::getPlayers)
+                    .map(List::size)
+                    .getOrElse(-1));
+            case "time" -> {
+                String timeFormat = !placeholderParams.isEmpty() ? placeholderParams.get(0) : "";
+                long time = world.getBukkitWorld().map(World::getTime).getOrElse(0L);
+                yield switch (timeFormat) {
+                    case "" -> String.valueOf(time);
+                    case "12h" -> MinecraftTimeFormatter.format12h(time);
+                    case "24h" -> MinecraftTimeFormatter.format24h(time);
+                    default -> MinecraftTimeFormatter.formatTime(time, timeFormat);
+                };
+            }
+            case "type" -> world.getBukkitWorld().map(World::getWorldType).map(Enum::name).getOrElse("null");
+            default -> null;
+        });
     }
 }

src/main/java/org/mvplugins/multiverse/core/command/MVCommandCompletions.java

@@ -6,6 +6,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.EnumSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.stream.Collectors;
 
@@ -26,6 +27,7 @@ import org.bukkit.GameRule;
 import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.entity.SpawnCategory;
 import org.jetbrains.annotations.NotNull;
@@ -42,16 +44,16 @@ import org.mvplugins.multiverse.core.config.handle.PropertyModifyAction;
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
 import org.mvplugins.multiverse.core.destination.DestinationSuggestionPacket;
 import org.mvplugins.multiverse.core.destination.DestinationsProvider;
+import org.mvplugins.multiverse.core.destination.core.WorldDestination;
 import org.mvplugins.multiverse.core.permissions.CorePermissionsChecker;
 import org.mvplugins.multiverse.core.utils.REPatterns;
-import org.mvplugins.multiverse.core.utils.StringFormatter;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 import org.mvplugins.multiverse.core.world.MultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.generators.GeneratorPlugin;
 import org.mvplugins.multiverse.core.world.generators.GeneratorProvider;
 
-import static org.mvplugins.multiverse.core.utils.StringFormatter.addonToCommaSeperated;
+import static org.mvplugins.multiverse.core.utils.StringFormatter.addOnToCommaSeparated;
 
 @Service
 public class MVCommandCompletions extends PaperCommandCompletions {
@@ -87,7 +89,7 @@ public class MVCommandCompletions extends PaperCommandCompletions {
         registerAsyncCompletion("commands", this::suggestCommands);
         registerAsyncCompletion("destinations", this::suggestDestinations);
         registerStaticCompletion("difficulties", suggestEnums(Difficulty.class));
-        registerStaticCompletion("environments", suggestEnums(World.Environment.class));
+        registerStaticCompletion("environments", List.of("normal", "nether", "the_end")); // Don't tab complete the "custom" environment
         registerAsyncCompletion("flags", this::suggestFlags);
         registerStaticCompletion("gamemodes", suggestEnums(GameMode.class));
         registerStaticCompletion("gamerules", this::suggestGamerules);
@@ -99,7 +101,7 @@ public class MVCommandCompletions extends PaperCommandCompletions {
         registerAsyncCompletion("mvworlds", this::suggestMVWorlds);
         registerAsyncCompletion("mvworldpropsname", this::suggestMVWorldPropsName);
         registerAsyncCompletion("mvworldpropsvalue", this::suggestMVWorldPropsValue);
-        registerAsyncCompletion("playersarray", this::suggestPlayersArray);
+        registerCompletion("playersarray", this::suggestPlayersArray); // getting online players cannot be async
         registerStaticCompletion("propsmodifyaction", suggestEnums(PropertyModifyAction.class));
         registerStaticCompletion("spawncategories", suggestEnums(SpawnCategory.class));
         registerAsyncCompletion("spawncategorypropsname", this::suggestSpawnCategoryPropsName);
@@ -161,7 +163,7 @@ public class MVCommandCompletions extends PaperCommandCompletions {
             }
         }
         if (context.hasConfig("multiple")) {
-            return addonToCommaSeperated(context.getInput(), handler.getCompletions(context));
+            return addOnToCommaSeparated(context.getInput(), handler.getCompletions(context));
         }
         return handler.getCompletions(context);
     }
@@ -176,7 +178,7 @@ public class MVCommandCompletions extends PaperCommandCompletions {
     public <T extends Enum<T>> Collection<String> suggestEnums(Class<T> enumClass) {
         return EnumSet.allOf(enumClass).stream()
                 .map(Enum::name)
-                .map(String::toLowerCase)
+                .map(name -> name.toLowerCase(Locale.ENGLISH))
                 .toList();
     }
 
@@ -223,18 +225,22 @@ public class MVCommandCompletions extends PaperCommandCompletions {
                         // Most likely console did not specify a player
                         return Collections.<String>emptyList();
                     }
-                    if (context.hasConfig("othersOnly") && (players.length == 1 && players[0].equals(context.getIssuer().getIssuer()))) {
+                    CommandSender sender = context.getIssuer().getIssuer();
+                    if (context.hasConfig("othersOnly") && (players.length == 1 && players[0].equals(sender))) {
                         return Collections.<String>emptyList();
                     }
-                    return suggestDestinationsWithPerms(context.getIssuer().getIssuer(), players, context.getInput());
+                    return suggestDestinationsWithPerms(sender, Arrays.asList(players), context.getInput());
                 })
                 .getOrElse(Collections.emptyList());
     }
 
-    private Collection<String> suggestDestinationsWithPerms(CommandSender teleporter, Player[] players, String deststring) {
+    private Collection<String> suggestDestinationsWithPerms(CommandSender teleporter, List<Entity> teleportees, String deststring) {
         return destinationsProvider.suggestDestinations(teleporter, deststring).stream()
+                .filter(packet -> !config.getSimplifiedDestinationTabCompletion()
+                        || packet.destination() instanceof WorldDestination
+                        || deststring.startsWith(packet.destination().getIdentifier() + ":"))
                 .filter(packet -> corePermissionsChecker
-                        .checkDestinationPacketPermission(teleporter, Arrays.asList(players), packet))
+                        .checkDestinationPacketPermission(teleporter, teleportees, packet))
                 .map(DestinationSuggestionPacket::parsableString)
                 .toList();
     }
@@ -278,19 +284,16 @@ public class MVCommandCompletions extends PaperCommandCompletions {
             case "both" -> {
                 return worldManager.getWorlds().stream()
                         .map(MultiverseWorld::getTabCompleteName)
-                        .map(StringFormatter::quoteMultiWordString)
                         .toList();
             }
             case "loaded" -> {
                 return worldManager.getLoadedWorlds().stream()
                         .map(MultiverseWorld::getTabCompleteName)
-                        .map(StringFormatter::quoteMultiWordString)
                         .toList();
             }
             case "unloaded" -> {
                 return worldManager.getUnloadedWorlds().stream()
                         .map(MultiverseWorld::getTabCompleteName)
-                        .map(StringFormatter::quoteMultiWordString)
                         .toList();
             }
             case "potential" -> {
@@ -331,7 +334,7 @@ public class MVCommandCompletions extends PaperCommandCompletions {
                 matchedPlayers.add(name);
             }
         }
-        return addonToCommaSeperated(context.getInput(), matchedPlayers);
+        return addOnToCommaSeparated(context.getInput(), matchedPlayers);
     }
 
     private Collection<String> suggestSpawnCategoryPropsName(BukkitCommandCompletionContext context) {

src/main/java/org/mvplugins/multiverse/core/command/MVCommandContexts.java

@@ -11,6 +11,7 @@ import co.aikar.commands.MinecraftMessageKeys;
 import co.aikar.commands.PaperCommandContexts;
 import co.aikar.commands.contexts.ContextResolver;
 import com.google.common.base.Strings;
+import io.vavr.control.Option;
 import io.vavr.control.Try;
 import jakarta.inject.Inject;
 import org.bukkit.Bukkit;
@@ -116,7 +117,8 @@ public class MVCommandContexts extends PaperCommandContexts {
         }
 
         return destinationsProvider.parseDestination(context.getSender(), destination)
-                .getOrThrow(failure -> MVInvalidCommandArgument.of(failure.getFailureMessage()));
+                .getOrThrow(failure ->
+                        new InvalidCommandArgument(failure.getFailureMessage().formatted(context.getIssuer())));
     }
 
     private GameRule<?> parseGameRule(BukkitCommandExecutionContext context) {
@@ -271,13 +273,25 @@ public class MVCommandContexts extends PaperCommandContexts {
     private IssuerAwareContextBuilder<Player[]> playerArrayContextBuilder() {
         return new IssuerAwareContextBuilder<Player[]>()
                 .fromPlayer((context, player) -> new Player[]{player})
-                .fromInput((context, input) -> {
-                    Player[] players = PlayerFinder.getMulti(input, context.getSender()).toArray(new Player[0]);
-                    return (players.length == 0) ? null : players;
-                })
+                .fromInput((context, input) -> PlayerFinder
+                        .tryGetMulti(input, context.getSender())
+                        .map(list -> list.toArray(new Player[0]))
+                        .map(arr -> (arr.length == 0) ? null : arr)
+                        .getOrElseThrow(failure -> {
+                            if (failure instanceof MVInvalidCommandArgument mvFailure) {
+                                throw mvFailure;
+                            }
+                            throw new InvalidCommandArgument(failure.getLocalizedMessage() + " "
+                                    + Option.of(failure.getCause()).map(Throwable::getLocalizedMessage).getOrElse(""));
+                        }))
                 .issuerOnlyFailMessage((context) -> Message.of("This command can only be used by a player."))
                 .issuerAwareInputFailMessage((context, input) -> Message.of("Invalid player: " + input + ". Either specify an online player or use this command as a player."))
-                .inputOnlyFailMessage((context, input) -> Message.of("Player " + input + " not found."));
+                .inputOnlyFailMessage((context, input) -> {
+                    if (PlayerFinder.isSelector(input)) {
+                        return Message.of("No player(s) matched selector: " + input + ".");
+                    }
+                    return Message.of("Player(s) " + input + " not found.");
+                });
     }
 
     private PlayerLocation parsePlayerLocation(BukkitCommandExecutionContext context) {

src/main/java/org/mvplugins/multiverse/core/command/MVCommandIssuer.java

@@ -112,9 +112,9 @@ public class MVCommandIssuer extends BukkitCommandIssuer {
         } else {
             var formatter = getManager().getFormat(messageType);
             if (formatter != null) {
-                sendMessage(formatter.format(message.formatted()));
+                sendMessage(formatter.format(message.formatted(getManager().getLocales(), this)));
             } else {
-                sendMessage(message.formatted());
+                sendMessage(message.formatted(getManager().getLocales(), this));
             }
         }
     }

src/main/java/org/mvplugins/multiverse/core/command/MVRootCommand.java

@@ -22,6 +22,9 @@ public class MVRootCommand extends BukkitRootCommand {
     @Override
     public List<String> getTabCompletions(CommandIssuer sender, String alias, String[] args, boolean commandsOnly, boolean isAsync) {
         String[] quoteFormatedArgs = StringFormatter.parseQuotesInArgs(args).toArray(String[]::new);
-        return super.getTabCompletions(sender, alias, quoteFormatedArgs, commandsOnly, isAsync);
+        return super.getTabCompletions(sender, alias, quoteFormatedArgs, commandsOnly, isAsync)
+                .stream()
+                .map(StringFormatter::quoteMultiWordString)
+                .toList();
     }
 }

src/main/java/org/mvplugins/multiverse/core/command/context/issueraware/IssuerAwareContextBuilder.java

@@ -123,48 +123,8 @@ public final class IssuerAwareContextBuilder<T> {
      */
     @ApiStatus.AvailableSince("5.1")
     public IssuerAwareContextResolver<T, BukkitCommandExecutionContext> generateContext() {
-        Objects.requireNonNull(fromPlayer);
-        Objects.requireNonNull(fromInput);
-        Objects.requireNonNull(issuerOnlyFailMessage);
-        Objects.requireNonNull(issuerAwarePlayerFailMessage);
-        Objects.requireNonNull(issuerAwareInputFailMessage);
-        Objects.requireNonNull(inputOnlyFailMessage);
-
-        return context -> {
-            BukkitCommandIssuer issuer = context.getIssuer();
-            String resolve = context.getFlagValue("resolve", "");
-
-            if (resolve.equals("issuerOnly")) {
-                if (issuer.isPlayer()) {
-                    T result = fromPlayer.apply(context, issuer.getPlayer());
-                    if (result != null) {
-                        return result;
-                    }
-                }
-                throw new InvalidCommandArgument(issuerOnlyFailMessage.apply(context).formatted(issuer));
-            }
-
-            String input = context.getFirstArg();
-            T result = fromInput.apply(context, input);
-            if (result != null) {
-                context.popFirstArg();
-                return result;
-            }
-
-            if (resolve.equals("issuerAware")) {
-                if (issuer.isPlayer()) {
-                    Player player = issuer.getPlayer();
-                    result = fromPlayer.apply(context, player);
-                    if (result != null) {
-                        return result;
-                    }
-                    throw new InvalidCommandArgument(issuerAwarePlayerFailMessage.apply(context, player).formatted(issuer));
-                }
-                throw new InvalidCommandArgument(issuerAwareInputFailMessage.apply(context, input).formatted(issuer));
-            }
-
-            throw new InvalidCommandArgument(inputOnlyFailMessage.apply(context, input).formatted(issuer));
-        };
+        validateRequiredVariables();
+        return context -> resolveValue(context, GenericIssuerAwareValue::new).value;
     }
 
     /**
@@ -178,49 +138,66 @@ public final class IssuerAwareContextBuilder<T> {
      */
     @ApiStatus.AvailableSince("5.1")
     public <I extends IssuerAwareValue> IssuerAwareContextResolver<I, BukkitCommandExecutionContext> generateContext(BiFunction<Boolean, T, I> createValue) {
-        // todo: This is a copy and paste from above
+        validateRequiredVariables();
+        return context -> resolveValue(context, createValue);
+    }
 
+    private void validateRequiredVariables() {
         Objects.requireNonNull(fromPlayer);
         Objects.requireNonNull(fromInput);
         Objects.requireNonNull(issuerOnlyFailMessage);
         Objects.requireNonNull(issuerAwarePlayerFailMessage);
         Objects.requireNonNull(issuerAwareInputFailMessage);
         Objects.requireNonNull(inputOnlyFailMessage);
+    }
 
-        return context -> {
-            BukkitCommandIssuer issuer = context.getIssuer();
-            String resolve = context.getFlagValue("resolve", "");
+    private <I extends IssuerAwareValue> I resolveValue(BukkitCommandExecutionContext context, BiFunction<Boolean, T, I> createValue) {
+        BukkitCommandIssuer issuer = context.getIssuer();
+        String resolve = context.getFlagValue("resolve", "");
 
-            if (resolve.equals("issuerOnly")) {
-                if (issuer.isPlayer()) {
-                    T result = fromPlayer.apply(context, issuer.getPlayer());
-                    if (result != null) {
-                        return createValue.apply(true, result);
-                    }
+        if (resolve.equals("issuerOnly")) {
+            if (issuer.isPlayer()) {
+                T result = fromPlayer.apply(context, issuer.getPlayer());
+                if (result != null) {
+                    return createValue.apply(true, result);
                 }
-                throw new InvalidCommandArgument(issuerOnlyFailMessage.apply(context).formatted(issuer));
             }
+            throw new InvalidCommandArgument(issuerOnlyFailMessage.apply(context).formatted(issuer));
+        }
 
-            String input = context.getFirstArg();
-            T result = fromInput.apply(context, input);
-            if (result != null) {
-                context.popFirstArg();
-                return createValue.apply(false, result);
-            }
+        String input = context.getFirstArg();
+        T result = fromInput.apply(context, input);
+        if (result != null) {
+            context.popFirstArg();
+            return createValue.apply(false, result);
+        }
 
-            if (resolve.equals("issuerAware")) {
-                if (issuer.isPlayer()) {
-                    Player player = issuer.getPlayer();
-                    result = fromPlayer.apply(context, player);
-                    if (result != null) {
-                        return createValue.apply(true, result);
-                    }
-                    throw new InvalidCommandArgument(issuerAwarePlayerFailMessage.apply(context, player).formatted(issuer));
+        int maxArgForAware = context.getFlagValue("maxArgForAware", Integer.MAX_VALUE);
+        long argLengthWithoutFlags = context.getArgs().stream()
+                .takeWhile(value -> !value.startsWith("-") && !value.isEmpty()) // ignore the flags
+                .count();
+
+        if (resolve.equals("issuerAware") && argLengthWithoutFlags <= maxArgForAware) {
+            if (issuer.isPlayer()) {
+                Player player = issuer.getPlayer();
+                result = fromPlayer.apply(context, player);
+                if (result != null) {
+                    return createValue.apply(true, result);
                 }
-                throw new InvalidCommandArgument(issuerAwareInputFailMessage.apply(context, input).formatted(issuer));
+                throw new InvalidCommandArgument(issuerAwarePlayerFailMessage.apply(context, player).formatted(issuer));
             }
+            throw new InvalidCommandArgument(issuerAwareInputFailMessage.apply(context, input).formatted(issuer));
+        }
 
-            throw new InvalidCommandArgument(inputOnlyFailMessage.apply(context, input).formatted(issuer));
-        };
+        throw new InvalidCommandArgument(inputOnlyFailMessage.apply(context, input).formatted(issuer));
+    }
+
+    private static class GenericIssuerAwareValue<T> extends IssuerAwareValue {
+        private final T value;
+
+        public GenericIssuerAwareValue(boolean byIssuer, T value) {
+            super(byIssuer);
+            this.value = value;
+        }
     }
 }

src/main/java/org/mvplugins/multiverse/core/command/flag/CommandValueFlag.java

@@ -3,6 +3,7 @@ package org.mvplugins.multiverse.core.command.flag;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
+import java.util.Locale;
 import java.util.function.Function;
 
 import co.aikar.commands.InvalidCommandArgument;
@@ -220,7 +221,7 @@ public class CommandValueFlag<T> extends CommandFlag {
         private void setEnumContext() {
             this.context = (String value) -> {
                 try {
-                    return Enum.valueOf(type, value.toUpperCase());
+                    return Enum.valueOf(type, value.toUpperCase(Locale.ENGLISH));
                 } catch (IllegalArgumentException e) {
                     throw new InvalidCommandArgument("Invalid value for argument " + key + ": " + value);
                 }
@@ -229,7 +230,7 @@ public class CommandValueFlag<T> extends CommandFlag {
 
         private void setEnumCompletion() {
             List<String> types = Arrays.stream(type.getEnumConstants())
-                    .map(typeClass -> typeClass.name().toLowerCase())
+                    .map(typeClass -> typeClass.name().toLowerCase(Locale.ENGLISH))
                     .toList();
 
             this.completion = (input) -> types;

src/main/java/org/mvplugins/multiverse/core/commands/ConfigCommand.java

@@ -67,12 +67,10 @@ class ConfigCommand extends CoreCommand {
     private void updateConfigValue(MVCommandIssuer issuer, String name, String value) {
         var stringPropertyHandle = config.getStringPropertyHandle();
         stringPropertyHandle.setPropertyString(issuer.getIssuer(), name, value)
-                .onSuccess(ignore -> {
-                    config.save();
-                    issuer.sendMessage(MVCorei18n.CONFIG_SET_SUCCESS,
-                            Replace.NAME.with(name),
-                            Replace.VALUE.with(stringPropertyHandle.getProperty(name).getOrNull()));
-                })
+                .andThenTry(config::save)
+                .onSuccess(ignore -> issuer.sendMessage(MVCorei18n.CONFIG_SET_SUCCESS,
+                        Replace.NAME.with(name),
+                        Replace.VALUE.with(stringPropertyHandle.getProperty(name).getOrNull())))
                 .onFailure(e -> issuer.sendMessage(MVCorei18n.CONFIG_SET_ERROR,
                         Replace.NAME.with(name),
                         Replace.VALUE.with(value),

src/main/java/org/mvplugins/multiverse/core/commands/CreateCommand.java

@@ -19,7 +19,6 @@ import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.command.LegacyAliasCommand;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
-import org.mvplugins.multiverse.core.command.MVCommandManager;
 import org.mvplugins.multiverse.core.command.flag.CommandFlag;
 import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
 import org.mvplugins.multiverse.core.command.flag.CommandValueFlag;
@@ -27,6 +26,7 @@ import org.mvplugins.multiverse.core.command.flag.FlagBuilder;
 import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
+import org.mvplugins.multiverse.core.utils.StringFormatter;
 import org.mvplugins.multiverse.core.utils.result.Attempt.Failure;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
@@ -53,7 +53,7 @@ class CreateCommand extends CoreCommand {
     @CommandPermission("multiverse.core.create")
     @CommandCompletion("@empty @environments @flags:groupName=" + Flags.NAME)
     @Syntax("<name> <environment> [--seed <seed> --generator <generator[:id]> --world-type <worldtype> --adjust-spawn "
-            + "--no-structures --biome <biome>]")
+            + "--no-structures --biome <biome> --properties <prop1=value1,prop2=value2,...>]")
     @Description("{@@mv-core.create.description}")
     void onCreateCommand(
             MVCommandIssuer issuer,
@@ -68,7 +68,7 @@ class CreateCommand extends CoreCommand {
 
             @Optional
             @Syntax("[--seed <seed> --generator <generator[:id]> --world-type <worldtype> --adjust-spawn "
-                    + "--no-structures --biome <biome>]")
+                    + "--no-structures --biome <biome> --properties <prop1=value1,prop2=value2,...>]")
             @Description("{@@mv-core.create.flags.description}")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
@@ -78,14 +78,15 @@ class CreateCommand extends CoreCommand {
         issuer.sendInfo(MVCorei18n.CREATE_LOADING);
 
         worldManager.createWorld(CreateWorldOptions.worldName(worldName)
-                .biome(parsedFlags.flagValue(flags.biome, ""))
-                .environment(environment)
-                .seed(parsedFlags.flagValue(flags.seed))
-                .worldType(parsedFlags.flagValue(flags.worldType, WorldType.NORMAL))
-                .useSpawnAdjust(!parsedFlags.hasFlag(flags.noAdjustSpawn))
-                .generator(parsedFlags.flagValue(flags.generator, ""))
-                .generatorSettings(parsedFlags.flagValue(flags.generatorSettings, ""))
-                .generateStructures(!parsedFlags.hasFlag(flags.noStructures)))
+                        .biome(parsedFlags.flagValue(flags.biome, ""))
+                        .environment(environment)
+                        .seed(parsedFlags.flagValue(flags.seed))
+                        .worldType(parsedFlags.flagValue(flags.worldType, WorldType.NORMAL))
+                        .useSpawnAdjust(!parsedFlags.hasFlag(flags.noAdjustSpawn))
+                        .generator(parsedFlags.flagValue(flags.generator, ""))
+                        .generatorSettings(parsedFlags.flagValue(flags.generatorSettings, ""))
+                        .generateStructures(!parsedFlags.hasFlag(flags.noStructures))
+                        .worldPropertyStrings(StringFormatter.parseCSVMap(parsedFlags.flagValue(flags.properties))))
                 .onSuccess(newWorld -> messageSuccess(issuer, newWorld))
                 .onFailure(failure -> messageFailure(issuer, failure));
     }
@@ -180,6 +181,10 @@ class CreateCommand extends CoreCommand {
                 .addAlias("-b")
                 .completion(input -> biomeProviderFactory.suggestBiomeString(input))
                 .build());
+
+        private final CommandValueFlag<String> properties = flag(CommandValueFlag.builder("--properties", String.class)
+                .addAlias("-p")
+                .build());
     }
 
     @Service

src/main/java/org/mvplugins/multiverse/core/commands/DumpsService.java

@@ -5,6 +5,7 @@ import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.Arrays;
 
 import com.dumptruckman.minecraft.util.Logging;
 import jakarta.inject.Inject;
@@ -136,6 +137,9 @@ final class DumpsService {
     }
 
     private String getPluginList() {
-        return " - " + StringUtils.join(plugin.getServer().getPluginManager().getPlugins(), "\n - ");
+        return " - " + StringUtils.join(Arrays.stream(plugin.getServer().getPluginManager().getPlugins())
+                .map(Object::toString)
+                .sorted()
+                .toList(), "\n - ");
     }
 }

src/main/java/org/mvplugins/multiverse/core/commands/EntitySpawnConfigCommand.java

@@ -52,7 +52,7 @@ final class EntitySpawnConfigCommand extends CoreCommand {
     void onInfoCommand(
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             MultiverseWorld world,
 
@@ -91,7 +91,7 @@ final class EntitySpawnConfigCommand extends CoreCommand {
     void onModifyCommand(
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=4")
             @Syntax("[world]")
             MultiverseWorld world,
 
@@ -113,11 +113,10 @@ final class EntitySpawnConfigCommand extends CoreCommand {
                 .getSpawnCategoryConfig(spawnCategory)
                 .getStringPropertyHandle()
                 .modifyPropertyString(property, value, action)
-                .onSuccess(ignore -> issuer.sendMessage("Successfully set " + property + " to " + value
+                .andThenTry(worldManager::saveWorldsConfig)
+                .onSuccess(ignore -> issuer.sendInfo("Successfully set " + property + " to " + value
                         + " for " + spawnCategory.name() + " in " + world.getName()))
-                .onFailure(e -> issuer.sendMessage("Unable to set " + property + " to " + value
+                .onFailure(e -> issuer.sendError("Unable to set " + property + " to " + value
                         + " for " + spawnCategory.name() + " in " + world.getName() + ": " + e.getMessage()));
-
-        worldManager.saveWorldsConfig();
     }
 }

src/main/java/org/mvplugins/multiverse/core/commands/GameruleCommand.java

@@ -67,7 +67,7 @@ class GameruleCommand extends CoreCommand {
             @Description("{@@mv-core.gamerule.set.value.description}")
             GameRuleValue gameRuleValue,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=2")
             @Syntax("[World or *]")
             @Description("{@@mv-core.gamerule.set.world.description}")
             LoadedMultiverseWorld[] worlds) {
@@ -114,7 +114,7 @@ class GameruleCommand extends CoreCommand {
             @Description("{@@mv-core.gamerule.reset.gamerule.description}")
             GameRule gamerule,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=1")
             @Syntax("[World or *]")
             @Description("{@@mv-core.gamerule.reset.world.description}")
             LoadedMultiverseWorld[] worlds) {
@@ -152,7 +152,7 @@ class GameruleCommand extends CoreCommand {
     void onGameruleListCommand(
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("<world>")
             @Description("{@@mv-core.gamerule.list.description.world}")
             LoadedMultiverseWorld world,

src/main/java/org/mvplugins/multiverse/core/commands/ImportCommand.java

@@ -68,7 +68,8 @@ class ImportCommand extends CoreCommand {
                         .biome(parsedFlags.flagValue(flags.biome, ""))
                         .environment(environment)
                         .generator(parsedFlags.flagValue(flags.generator, String.class))
-                        .useSpawnAdjust(!parsedFlags.hasFlag(flags.noAdjustSpawn)))
+                        .useSpawnAdjust(!parsedFlags.hasFlag(flags.noAdjustSpawn))
+                        .doFolderCheck(!parsedFlags.hasFlag(flags.skipFolderCheck)))
                 .onSuccess(newWorld -> {
                     Logging.fine("World import success: " + newWorld);
                     issuer.sendInfo(MVCorei18n.IMPORT_SUCCESS, Replace.WORLD.with(newWorld.getName()));
@@ -105,6 +106,10 @@ class ImportCommand extends CoreCommand {
         private final CommandValueFlag<String> biome = flag(CommandValueFlag.builder("--biome", String.class)
                 .addAlias("-b")
                 .build());
+
+        private final CommandFlag skipFolderCheck = flag(CommandFlag.builder("--skip-folder-check")
+                .addAlias("-f")
+                .build());
     }
 
     @Service

src/main/java/org/mvplugins/multiverse/core/commands/InfoCommand.java

@@ -61,8 +61,8 @@ class InfoCommand extends CoreCommand {
     public void onInfoCommand(
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
-            @Syntax("<world>")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
+            @Syntax("[world]")
             @Description("{@@mv-core.info.description.world}")
             LoadedMultiverseWorld world,
 

src/main/java/org/mvplugins/multiverse/core/commands/LoadCommand.java

@@ -3,9 +3,8 @@ package org.mvplugins.multiverse.core.commands;
 import co.aikar.commands.annotation.CommandAlias;
 import co.aikar.commands.annotation.CommandCompletion;
 import co.aikar.commands.annotation.CommandPermission;
-import co.aikar.commands.annotation.Conditions;
 import co.aikar.commands.annotation.Description;
-import co.aikar.commands.annotation.Single;
+import co.aikar.commands.annotation.Optional;
 import co.aikar.commands.annotation.Subcommand;
 import co.aikar.commands.annotation.Syntax;
 import com.dumptruckman.minecraft.util.Logging;
@@ -15,19 +14,26 @@ import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.command.LegacyAliasCommand;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
-import org.mvplugins.multiverse.core.command.MVCommandManager;
+import org.mvplugins.multiverse.core.command.flag.CommandFlag;
+import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
+import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
+import org.mvplugins.multiverse.core.command.flags.RemovePlayerFlags;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
+import org.mvplugins.multiverse.core.world.MultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
+import org.mvplugins.multiverse.core.world.options.LoadWorldOptions;
 
 @Service
 class LoadCommand extends CoreCommand {
 
     private final WorldManager worldManager;
+    private final LoadCommand.Flags flags;
 
     @Inject
-    LoadCommand(@NotNull WorldManager worldManager) {
+    LoadCommand(@NotNull WorldManager worldManager, @NotNull Flags flags) {
         this.worldManager = worldManager;
+        this.flags = flags;
     }
 
     @Subcommand("load")
@@ -38,13 +44,19 @@ class LoadCommand extends CoreCommand {
     void onLoadCommand(
             MVCommandIssuer issuer,
 
-            @Single
-            @Conditions("worldname:scope=unloaded")
             @Syntax("<world>")
             @Description("{@@mv-core.load.world.description}")
-            String worldName) {
-        issuer.sendInfo(MVCorei18n.LOAD_LOADING, Replace.WORLD.with(worldName));
-        worldManager.loadWorld(worldName)
+            MultiverseWorld world,
+
+            @Optional
+            @Syntax("[--remove-players]")
+            @Description("")
+            String[] flagArray) {
+        ParsedCommandFlags parsedFlags = flags.parse(flagArray);
+
+        issuer.sendInfo(MVCorei18n.LOAD_LOADING, Replace.WORLD.with(world.getName()));
+        worldManager.loadWorld(LoadWorldOptions.world(world)
+                        .doFolderCheck(!parsedFlags.hasFlag(flags.skipFolderCheck)))
                 .onSuccess(newWorld -> {
                     Logging.fine("World load success: " + newWorld);
                     issuer.sendInfo(MVCorei18n.LOAD_SUCCESS, Replace.WORLD.with(newWorld.getName()));
@@ -54,17 +66,32 @@ class LoadCommand extends CoreCommand {
                 });
     }
 
+    @Service
+    private static final class Flags extends RemovePlayerFlags {
+
+        private static final String NAME = "mvunload";
+
+        @Inject
+        private Flags(@NotNull CommandFlagsManager flagsManager) {
+            super(NAME, flagsManager);
+        }
+
+        private final CommandFlag skipFolderCheck = flag(CommandFlag.builder("--skip-folder-check")
+                .addAlias("-f")
+                .build());
+    }
+
     @Service
     private static final class LegacyAlias extends LoadCommand implements LegacyAliasCommand {
         @Inject
-        LegacyAlias(@NotNull WorldManager worldManager) {
-            super(worldManager);
+        LegacyAlias(@NotNull WorldManager worldManager, @NotNull Flags flags) {
+            super(worldManager, flags);
         }
 
         @Override
         @CommandAlias("mvload")
-        void onLoadCommand(MVCommandIssuer issuer, String worldName) {
-            super.onLoadCommand(issuer, worldName);
+        void onLoadCommand(MVCommandIssuer issuer, MultiverseWorld world, String[] flagArray) {
+            super.onLoadCommand(issuer, world, flagArray);
         }
     }
 }

src/main/java/org/mvplugins/multiverse/core/commands/ModifyCommand.java

@@ -49,12 +49,12 @@ class ModifyCommand extends CoreCommand {
             "@propsmodifyaction:notByIssuerForArg=arg1|@mvworldpropsname:byIssuerForArg=arg1 " +
             "@mvworldpropsname:notByIssuerForArg=arg1|@mvworldpropsvalue:byIssuerForArg=arg1 " +
             "@mvworldpropsvalue:notByIssuerForArg=arg1")
-    @Syntax("[world] <set|add|remove|reset> <property> <value>")
+    @Syntax("[world] <set|add|remove|reset> <property> [value]")
     @Description("{@@mv-core.modify.description}")
     void onModifyCommand(// SUPPRESS CHECKSTYLE: ParameterNumber
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=3")
             @Syntax("[world]")
             @Description("{@@mv-core.modify.world.description}")
             @NotNull MultiverseWorldValue worldValue,
@@ -94,28 +94,28 @@ class ModifyCommand extends CoreCommand {
         }
 
         StringPropertyHandle worldPropertyHandle = world.getStringPropertyHandle();
-        worldPropertyHandle.modifyPropertyString(issuer.getIssuer(), propertyName, propertyValue, action).onSuccess(ignore -> {
-            issuer.sendMessage(MVCorei18n.MODIFY_SUCCESS,
+        worldPropertyHandle.modifyPropertyString(issuer.getIssuer(), propertyName, propertyValue, action)
+                .andThenTry(worldManager::saveWorldsConfig)
+                .onSuccess(ignore -> issuer.sendMessage(MVCorei18n.MODIFY_SUCCESS,
                     replace("{action}").with(action.name().toLowerCase()),
                     replace("{property}").with(propertyName),
                     Replace.VALUE.with(worldPropertyHandle.getProperty(propertyName).getOrNull()),
-                    Replace.WORLD.with(world.getName()));
-            worldManager.saveWorldsConfig();
-        }).onFailure(exception -> {
-            if (propertyValue == null) {
-                issuer.sendMessage(MVCorei18n.MODIFY_FAILURE_NOVALUE,
-                        replace("{action}").with(action.name().toLowerCase()),
-                        replace("{property}").with(propertyName),
-                        Replace.WORLD.with(world.getName()),
-                        Replace.ERROR.with(exception.getMessage()));
-            } else {
-                issuer.sendMessage(MVCorei18n.MODIFY_FAILURE,
-                        replace("{action}").with(action.name().toLowerCase()),
-                        replace("{property}").with(propertyName),
-                        Replace.VALUE.with(propertyValue),
-                        Replace.WORLD.with(world.getName()),
-                        Replace.ERROR.with(exception.getMessage()));
-            }
+                    Replace.WORLD.with(world.getName())))
+                .onFailure(exception -> {
+                    if (propertyValue == null) {
+                        issuer.sendMessage(MVCorei18n.MODIFY_FAILURE_NOVALUE,
+                                replace("{action}").with(action.name().toLowerCase()),
+                                replace("{property}").with(propertyName),
+                                Replace.WORLD.with(world.getName()),
+                                Replace.ERROR.with(exception.getMessage()));
+                    } else {
+                        issuer.sendMessage(MVCorei18n.MODIFY_FAILURE,
+                                replace("{action}").with(action.name().toLowerCase()),
+                                replace("{property}").with(propertyName),
+                                Replace.VALUE.with(propertyValue),
+                                Replace.WORLD.with(world.getName()),
+                                Replace.ERROR.with(exception.getMessage()));
+                    }
         });
     }
 

src/main/java/org/mvplugins/multiverse/core/commands/PurgeAllEntitiesCommand.java

@@ -33,7 +33,7 @@ final class PurgeAllEntitiesCommand extends CoreCommand {
     void onPurgeAllEntitiesCommand(
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=1")
             @Syntax("[world]")
             LoadedMultiverseWorld world,
 

src/main/java/org/mvplugins/multiverse/core/commands/PurgeEntitiesCommand.java

@@ -28,7 +28,7 @@ final class PurgeEntitiesCommand extends CoreCommand {
     void onPurgeEntityCommand(
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {

src/main/java/org/mvplugins/multiverse/core/commands/RemoveCommand.java

@@ -15,6 +15,8 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.command.LegacyAliasCommand;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
 import org.mvplugins.multiverse.core.command.MVCommandManager;
+import org.mvplugins.multiverse.core.command.flag.CommandFlag;
+import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
 import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
 import org.mvplugins.multiverse.core.command.flags.RemovePlayerFlags;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
@@ -23,19 +25,20 @@ import org.mvplugins.multiverse.core.utils.result.AsyncAttemptsAggregate;
 import org.mvplugins.multiverse.core.world.MultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.helpers.PlayerWorldTeleporter;
+import org.mvplugins.multiverse.core.world.options.RemoveWorldOptions;
 
 @Service
 class RemoveCommand extends CoreCommand {
 
     private final WorldManager worldManager;
     private final PlayerWorldTeleporter playerWorldTeleporter;
-    private final RemovePlayerFlags flags;
+    private final Flags flags;
 
     @Inject
     RemoveCommand(
             @NotNull WorldManager worldManager,
             @NotNull PlayerWorldTeleporter playerWorldTeleporter,
-            @NotNull RemovePlayerFlags flags
+            @NotNull Flags flags
     ) {
         this.worldManager = worldManager;
         this.playerWorldTeleporter = playerWorldTeleporter;
@@ -44,7 +47,7 @@ class RemoveCommand extends CoreCommand {
 
     @Subcommand("remove")
     @CommandPermission("multiverse.core.remove")
-    @CommandCompletion("@mvworlds:scope=both @flags:groupName=" + RemovePlayerFlags.NAME)
+    @CommandCompletion("@mvworlds:scope=both @flags:groupName=" + Flags.NAME)
     @Syntax("<world>")
     @Description("{@@mv-core.remove.description}")
     void onRemoveCommand(
@@ -64,12 +67,14 @@ class RemoveCommand extends CoreCommand {
                 ? worldManager.getLoadedWorld(world).map(playerWorldTeleporter::removeFromWorld).getOrElse(AsyncAttemptsAggregate::emptySuccess)
                 : AsyncAttemptsAggregate.emptySuccess();
 
-        future.onSuccess(() -> doWorldRemoving(issuer, world))
+        future.onSuccess(() -> doWorldRemoving(issuer, world, parsedFlags))
                 .onFailure(() -> issuer.sendError("Failed to teleport one or more players out of the world!"));
     }
 
-    private void doWorldRemoving(MVCommandIssuer issuer, MultiverseWorld world) {
-        worldManager.removeWorld(world)
+    private void doWorldRemoving(MVCommandIssuer issuer, MultiverseWorld world, ParsedCommandFlags parsedFlags) {
+        worldManager.removeWorld(RemoveWorldOptions.world(world)
+                        .saveBukkitWorld(!parsedFlags.hasFlag(flags.noSave))
+                        .unloadBukkitWorld(!parsedFlags.hasFlag(flags.noUnloadBukkitWorld)))
                 .onSuccess(removedWorldName -> {
                     Logging.fine("World remove success: " + removedWorldName);
                     issuer.sendInfo(MVCorei18n.REMOVE_SUCCESS, Replace.WORLD.with(removedWorldName));
@@ -79,13 +84,32 @@ class RemoveCommand extends CoreCommand {
                 });
     }
 
+    @Service
+    private static final class Flags extends RemovePlayerFlags {
+
+        private static final String NAME = "mvremove";
+
+        @Inject
+        private Flags(@NotNull CommandFlagsManager flagsManager) {
+            super(NAME, flagsManager);
+        }
+
+        private final CommandFlag noUnloadBukkitWorld = flag(CommandFlag.builder("--no-unload-bukkit-world")
+                .addAlias("-b")
+                .build());
+
+        private final CommandFlag noSave = flag(CommandFlag.builder("--no-save")
+                .addAlias("-n")
+                .build());
+    }
+
     @Service
     private static final class LegacyAlias extends RemoveCommand implements LegacyAliasCommand {
         @Inject
         LegacyAlias(
                 @NotNull WorldManager worldManager,
                 @NotNull PlayerWorldTeleporter playerWorldTeleporter,
-                RemovePlayerFlags flags
+                @NotNull Flags flags
         ) {
             super(worldManager, playerWorldTeleporter, flags);
         }

src/main/java/org/mvplugins/multiverse/core/commands/SetSpawnCommand.java

@@ -63,7 +63,7 @@ class SetSpawnCommand extends CoreCommand {
 
         worldManager.getLoadedWorld(location.getWorld())
                 .peek(mvWorld -> mvWorld.setSpawnLocation(location)
-                        .flatMap(ignore -> worldManager.saveWorldsConfig())
+                        .andThenTry(worldManager::saveWorldsConfig)
                         .onSuccess(ignore -> issuer.sendMessage(MVCorei18n.SETSPAWN_SUCCESS,
                                 Replace.WORLD.with(mvWorld.getName()),
                                 Replace.LOCATION.with(prettyLocation(location))))

src/main/java/org/mvplugins/multiverse/core/commands/SpawnCommand.java

@@ -108,7 +108,7 @@ final class SpawnCommand extends CoreCommand {
         safetyTeleporter.to(mvWorld.getSpawnLocation())
                 .by(issuer)
                 .checkSafety(checkSafety)
-                .teleport(entity)
+                .teleportSingle(entity)
                 .onSuccess(() -> issuer.sendInfo(MVCorei18n.SPAWN_SUCCESS,
                         Replace.PLAYER.with(entity.equals(issuer.getPlayer())
                                 ? Message.of(MVCorei18n.GENERIC_YOU)
@@ -119,7 +119,7 @@ final class SpawnCommand extends CoreCommand {
                                 ? Message.of(MVCorei18n.GENERIC_YOU)
                                 : Message.of(entity.getName())),
                         Replace.WORLD.with(mvWorld.getName()),
-                        Replace.REASON.with(failure.getFailureMessage())));
+                        Replace.REASON.with(failure.get(0).getFailureMessage())));
     }
 
     private void handleMultiTeleport(MVCommandIssuer issuer, LoadedMultiverseWorld mvWorld,

src/main/java/org/mvplugins/multiverse/core/commands/TeleportCommand.java

@@ -19,7 +19,10 @@ import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
 import org.mvplugins.multiverse.core.command.context.issueraware.PlayerArrayValue;
+import org.mvplugins.multiverse.core.command.flag.CommandFlag;
+import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
 import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
+import org.mvplugins.multiverse.core.command.flags.PageFilterFlags;
 import org.mvplugins.multiverse.core.command.flags.UnsafeFlags;
 import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
@@ -35,14 +38,14 @@ final class TeleportCommand extends CoreCommand {
     private final CoreConfig config;
     private final CorePermissionsChecker permissionsChecker;
     private final AsyncSafetyTeleporter safetyTeleporter;
-    private final UnsafeFlags flags;
+    private final Flags flags;
 
     @Inject
     TeleportCommand(
             @NotNull CoreConfig config,
             @NotNull CorePermissionsChecker permissionsChecker,
             @NotNull AsyncSafetyTeleporter safetyTeleporter,
-            @NotNull UnsafeFlags flags
+            @NotNull Flags flags
     ) {
         this.config = config;
         this.permissionsChecker = permissionsChecker;
@@ -54,14 +57,14 @@ final class TeleportCommand extends CoreCommand {
     @Subcommand("teleport|tp")
     @CommandPermission("@mvteleport")
     @CommandCompletion("@playersarray:checkPermissions=@mvteleportother|@destinations:byIssuerForArg=arg1 "
-            + "@destinations:notByIssuerForArg=arg1|@flags:byIssuerForArg=arg1,groupName=" + UnsafeFlags.NAME + " "
-            + "@flags:notByIssuerForArg=arg1,groupName=" + UnsafeFlags.NAME)
+            + "@destinations:notByIssuerForArg=arg1|@flags:byIssuerForArg=arg1,groupName=" + Flags.NAME + " "
+            + "@flags:notByIssuerForArg=arg1,groupName=" + Flags.NAME)
     @Syntax("[player] <destination> [--unsafe]")
     @Description("{@@mv-core.teleport.description}")
     void onTeleportCommand(
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
+            @co.aikar.commands.annotation.Flags("resolve=issuerAware,maxArgForAware=1")
             @Syntax("[player]")
             @Description("{@@mv-core.teleport.player.description}")
             PlayerArrayValue playersValue,
@@ -103,16 +106,21 @@ final class TeleportCommand extends CoreCommand {
                 .checkSafety(!parsedFlags.hasFlag(flags.unsafe) && destination.checkTeleportSafety())
                 .passengerMode(config.getPassengerMode())
                 .teleportSingle(player)
-                .onSuccess(() -> issuer.sendInfo(MVCorei18n.TELEPORT_SUCCESS,
-                        Replace.PLAYER.with(getYouOrName(issuer, player)),
-                        Replace.DESTINATION.with(destination.toString())))
+                .onSuccess(() -> {
+                    if (parsedFlags.hasFlag(flags.silent)) {
+                        return;
+                    }
+                    issuer.sendInfo(MVCorei18n.TELEPORT_SUCCESS,
+                            Replace.PLAYER.with(getYouOrName(issuer, player)),
+                            Replace.DESTINATION.with(destination.getDisplayMessage()));
+                })
                 .onFailureCount(reasonsCountMap -> {
                     for (var entry : reasonsCountMap.entrySet()) {
                         Logging.finer("Failed to teleport %s players to %s: %s",
                                 entry.getValue(), destination, entry.getKey());
                         issuer.sendError(MVCorei18n.TELEPORT_FAILED,
                                 Replace.PLAYER.with(player.getName()),
-                                Replace.DESTINATION.with(destination.toString()),
+                                Replace.DESTINATION.with(destination.getDisplayMessage()),
                                 Replace.REASON.with(Message.of(entry.getKey())));
                     }
                 });
@@ -136,18 +144,38 @@ final class TeleportCommand extends CoreCommand {
                 .checkSafety(!parsedFlags.hasFlag(flags.unsafe) && destination.checkTeleportSafety())
                 .passengerMode(config.getPassengerMode())
                 .teleport(List.of(players))
-                .onSuccessCount(successCount -> issuer.sendInfo(MVCorei18n.TELEPORT_SUCCESS,
-                        Replace.PLAYER.with(successCount + " players"),
-                        Replace.DESTINATION.with(destination.toString())))
+                .onSuccessCount(successCount -> {
+                    if (parsedFlags.hasFlag(flags.silent)) {
+                        return;
+                    }
+                    issuer.sendInfo(MVCorei18n.TELEPORT_SUCCESS,
+                            Replace.PLAYER.with(successCount + " players"),
+                            Replace.DESTINATION.with(destination.getDisplayMessage()));
+                })
                 .onFailureCount(reasonsCountMap -> {
                     for (var entry : reasonsCountMap.entrySet()) {
                         Logging.finer("Failed to teleport %s players to %s: %s",
                                 entry.getValue(), destination, entry.getKey());
                         issuer.sendError(MVCorei18n.TELEPORT_FAILED,
                                 Replace.PLAYER.with(entry.getValue() + " players"),
-                                Replace.DESTINATION.with(destination.toString()),
+                                Replace.DESTINATION.with(destination.getDisplayMessage()),
                                 Replace.REASON.with(Message.of(entry.getKey())));
                     }
                 });
     }
+
+    @Service
+    private static final class Flags extends UnsafeFlags {
+
+        private static final String NAME = "mvteleport";
+
+        @Inject
+        private Flags(@NotNull CommandFlagsManager flagsManager) {
+            super(NAME, flagsManager);
+        }
+
+        private final CommandFlag silent = flag(CommandFlag.builder("--silent")
+                .addAlias("-s")
+                .build());
+    }
 }

src/main/java/org/mvplugins/multiverse/core/commands/WhoCommand.java

@@ -74,12 +74,12 @@ class WhoCommand extends CoreCommand {
     @Subcommand("who")
     @CommandPermission("multiverse.core.list.who")
     @CommandCompletion("@mvworlds:scope=both @flags:groupName=" + PageFilterFlags.NAME)
-    @Syntax("<world> [--page <page>] [--filter <filter>]")
+    @Syntax("[world] [--page <page>] [--filter <filter>]")
     @Description("{@@mv-core.who.description}")
     void onWhoCommand(
             MVCommandIssuer issuer,
-            @Flags("resolve=issuerAware")
-            @Syntax("<world>")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
+            @Syntax("[world]")
             @Description("{@@mv-core.who.world.description}")
             LoadedMultiverseWorld inputtedWorld,
 

src/main/java/org/mvplugins/multiverse/core/commands/WorldBorderCommand.java

@@ -35,7 +35,7 @@ final class WorldBorderCommand extends CoreCommand {
             @Syntax("[time]")
             int time,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
@@ -54,7 +54,7 @@ final class WorldBorderCommand extends CoreCommand {
             @Syntax("[z]")
             double z,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
@@ -79,7 +79,7 @@ final class WorldBorderCommand extends CoreCommand {
             @Syntax("<damage>")
             double damage,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
@@ -103,7 +103,7 @@ final class WorldBorderCommand extends CoreCommand {
             @Syntax("<distance>")
             double distance,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
@@ -124,7 +124,7 @@ final class WorldBorderCommand extends CoreCommand {
     void onWorldBorderGet(
             MVCommandIssuer issuer,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
@@ -147,7 +147,7 @@ final class WorldBorderCommand extends CoreCommand {
             @Syntax("[time]")
             int time,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
@@ -179,7 +179,7 @@ final class WorldBorderCommand extends CoreCommand {
             @Syntax("<distance>")
             int distance,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
@@ -203,7 +203,7 @@ final class WorldBorderCommand extends CoreCommand {
             @Syntax("<time>")
             int time,
 
-            @Flags("resolve=issuerAware")
+            @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {

src/main/java/org/mvplugins/multiverse/core/config/CoreConfig.java

@@ -8,16 +8,13 @@ import java.util.Locale;
 import com.dumptruckman.minecraft.util.Logging;
 import io.vavr.control.Try;
 import jakarta.inject.Inject;
-import jakarta.inject.Provider;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.event.EventPriority;
-import org.bukkit.plugin.PluginManager;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.MultiverseCore;
-import org.mvplugins.multiverse.core.command.MVCommandManager;
 import org.mvplugins.multiverse.core.command.queue.ConfirmMode;
 import org.mvplugins.multiverse.core.config.handle.CommentedConfigurationHandle;
 import org.mvplugins.multiverse.core.config.handle.StringPropertyHandle;
@@ -28,7 +25,6 @@ import org.mvplugins.multiverse.core.config.migration.action.InvertBoolMigratorA
 import org.mvplugins.multiverse.core.config.migration.action.MoveMigratorAction;
 import org.mvplugins.multiverse.core.config.migration.VersionMigrator;
 import org.mvplugins.multiverse.core.config.migration.action.SetMigratorAction;
-import org.mvplugins.multiverse.core.destination.DestinationsProvider;
 import org.mvplugins.multiverse.core.teleportation.PassengerMode;
 import org.mvplugins.multiverse.core.teleportation.PassengerModes;
 import org.mvplugins.multiverse.core.world.helpers.DimensionFinder.DimensionFormat;
@@ -190,6 +186,36 @@ public final class CoreConfig {
         return configHandle.get(configNodes.enforceFlight);
     }
 
+    @ApiStatus.AvailableSince("5.5")
+    public Try<Void> setGamemodeAndFlightEnforceDelay(int delayTicks) {
+        return configHandle.set(configNodes.gamemodeAndFlightEnforceDelay, delayTicks);
+    }
+
+    @ApiStatus.AvailableSince("5.5")
+    public int getGamemodeAndFlightEnforceDelay() {
+        return configHandle.get(configNodes.gamemodeAndFlightEnforceDelay);
+    }
+
+    @ApiStatus.AvailableSince("5.3")
+    public Try<Void> setApplyEntitySpawnRate(boolean applyEntitySpawnRate) {
+        return configHandle.set(configNodes.applyEntitySpawnRate, applyEntitySpawnRate);
+    }
+
+    @ApiStatus.AvailableSince("5.3")
+    public boolean getApplyEntitySpawnRate() {
+        return configHandle.get(configNodes.applyEntitySpawnRate);
+    }
+
+    @ApiStatus.AvailableSince("5.3")
+    public Try<Void> setApplyEntitySpawnLimit(boolean applyEntitySpawnLimit) {
+        return configHandle.set(configNodes.applyEntitySpawnLimit, applyEntitySpawnLimit);
+    }
+
+    @ApiStatus.AvailableSince("5.3")
+    public boolean getApplyEntitySpawnLimit() {
+        return configHandle.get(configNodes.applyEntitySpawnLimit);
+    }
+
     /**
      * {@inheritDoc}
      */
@@ -477,6 +503,26 @@ public final class CoreConfig {
         return configHandle.get(configNodes.registerPapiHook);
     }
 
+    @ApiStatus.AvailableSince("5.5")
+    public Try<Void> setWarnInvalidPapiFormat(boolean warnInvalidPapiFormat) {
+        return configHandle.set(configNodes.warnInvalidPapiFormat, warnInvalidPapiFormat);
+    }
+
+    @ApiStatus.AvailableSince("5.5")
+    public boolean getWarnInvalidPapiFormat() {
+        return configHandle.get(configNodes.warnInvalidPapiFormat);
+    }
+
+    @ApiStatus.AvailableSince("5.5")
+    public Try<Void> setInvalidPapiFormatReturnsBlank(boolean invalidPapiFormatReturnsBlank) {
+        return configHandle.set(configNodes.invalidPapiFormatReturnsBlank, invalidPapiFormatReturnsBlank);
+    }
+
+    @ApiStatus.AvailableSince("5.5")
+    public  boolean getInvalidPapiFormatReturnsBlank() {
+        return configHandle.get(configNodes.invalidPapiFormatReturnsBlank);
+    }
+
     /**
      * {@inheritDoc}
      */
@@ -519,6 +565,16 @@ public final class CoreConfig {
         return configHandle.get(configNodes.resolveAliasName);
     }
 
+    @ApiStatus.AvailableSince("5.4")
+    public Try<Void> setSimplifiedDestinationTabCompletion(boolean simplifiedDestinationTabCompletion) {
+        return configHandle.set(configNodes.simplifiedDestinationTabCompletion, simplifiedDestinationTabCompletion);
+    }
+
+    @ApiStatus.AvailableSince("5.4")
+    public boolean getSimplifiedDestinationTabCompletion() {
+        return configHandle.get(configNodes.simplifiedDestinationTabCompletion);
+    }
+
     /**
      * {@inheritDoc}
      */
@@ -595,6 +651,16 @@ public final class CoreConfig {
         return configHandle.get(configNodes.eventPriorityPlayerTeleport);
     }
 
+    @ApiStatus.AvailableSince("5.5")
+    public Try<Void> setEventPriorityPlayerWorldChange(EventPriority eventPriorityPlayerWorldChange) {
+        return configHandle.set(configNodes.eventPriorityPlayerWorldChange, eventPriorityPlayerWorldChange);
+    }
+
+    @ApiStatus.AvailableSince("5.5")
+    public EventPriority getEventPriorityPlayerWorldChange() {
+        return configHandle.get(configNodes.eventPriorityPlayerWorldChange);
+    }
+
     public Try<Void> setBukkitYmlPath(String bukkitYmlPath) {
         return configHandle.set(configNodes.bukkitYmlPath, bukkitYmlPath);
     }
@@ -603,6 +669,26 @@ public final class CoreConfig {
         return configHandle.get(configNodes.bukkitYmlPath);
     }
 
+    @ApiStatus.AvailableSince("5.3")
+    public Try<Void> setServerPropertiesPath(String serverPropertiesPath) {
+        return configHandle.set(configNodes.serverPropertiesPath, serverPropertiesPath);
+    }
+
+    @ApiStatus.AvailableSince("5.3")
+    public String getServerPropertiesPath() {
+        return configHandle.get(configNodes.serverPropertiesPath);
+    }
+
+    @ApiStatus.AvailableSince("5.3")
+    public Try<Void> setAutoDetectGeneratorPlugins(boolean autoDetectGeneratorPlugins) {
+        return configHandle.set(configNodes.autoDetectGeneratorPlugins, autoDetectGeneratorPlugins);
+    }
+
+    @ApiStatus.AvailableSince("5.3")
+    public boolean getAutoDetectGeneratorPlugins() {
+        return configHandle.get(configNodes.autoDetectGeneratorPlugins);
+    }
+
     /**
      * {@inheritDoc}
      */

src/main/java/org/mvplugins/multiverse/core/config/CoreConfigNodes.java

@@ -4,6 +4,7 @@ import com.dumptruckman.minecraft.util.Logging;
 import io.vavr.control.Try;
 import jakarta.inject.Inject;
 import jakarta.inject.Provider;
+import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.event.EventPriority;
 import org.bukkit.plugin.PluginManager;
@@ -76,13 +77,10 @@ final class CoreConfigNodes {
             .comment("#                    █░▀░█ █▄█ █▄▄ ░█░ █ ▀▄▀ ██▄ █▀▄ ▄█ ██▄   █▄▄ █▄█ █▀▄ ██▄                      #")
             .comment("#                                                                                                  #")
             .comment("#                                                                                                  #")
-            .comment("#    WIKI:        https://github.com/Multiverse/Multiverse-Core/wiki                               #")
+            .comment("#    WIKI:        https://mvplugins.org/core/                                                      #")
             .comment("#    DISCORD:     https://discord.gg/NZtfKky                                                       #")
             .comment("#    BUG REPORTS: https://github.com/Multiverse/Multiverse-Core/issues                             #")
-            .comment("#                                                                                                  #")
-            .comment("#                                                                                                  #")
-            .comment("#    Each option in this file is documented and explained here:                                    #")
-            .comment("#     ==>  https://github.com/Multiverse/Multiverse-Core/wiki/config.yml                           #")
+            .comment("#    DONATE:      https://github.com/sponsors/Multiverse                                           #")
             .comment("#                                                                                                  #")
             .comment("#                                                                                                  #")
             .comment("#    New options are added to this file automatically. If you manually made changes                #")
@@ -137,6 +135,42 @@ final class CoreConfigNodes {
             .name("enforce-flight")
             .build());
 
+    final ConfigNode<Integer> gamemodeAndFlightEnforceDelay = node(ConfigNode.builder("world.gamemode-and-flight-enforce-delay", Integer.class)
+            .comment("")
+            .comment("Sets the delay in ticks before Multiverse enforces gamemode and flight ability on world change.")
+            .comment("Increase this value if you are experiencing issues with other plugins overriding gamemode or flight ability.")
+            .comment("Or set to 0 to enforce immediately during world change event.")
+            .defaultValue(1)
+            .name("gamemode-and-flight-enforce-delay")
+            .suggester((sender -> List.of("0", "1", "2", "5", "10")))
+            .build());
+
+    final ConfigNode<Boolean> applyEntitySpawnRate = node(ConfigNode.builder("world.apply-entity-spawn-rate", Boolean.class)
+            .comment("")
+            .comment("Sets whether Multiverse will apply the world's entity `tick-rate` config in worlds.yml.")
+            .comment("If disabled, the `tick-rate` config in worlds.yml will be ignored.")
+            .comment("Disable this if you want paper-world.yml or another plugin to handle entity spawn rate per world.")
+            .comment("!!!NOTE: This will only apply after a server restart!")
+            .defaultValue(true)
+            .name("apply-entity-spawn-rate")
+            .onChange(((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'apply-entity-spawn-rate' config option will only take " +
+                            "full effect after a server restart.")))
+            .build());
+
+    final ConfigNode<Boolean> applyEntitySpawnLimit = node(ConfigNode.builder("world.apply-entity-spawn-limit", Boolean.class)
+            .comment("")
+            .comment("Sets whether Multiverse will apply the world's entity `spawn-limit` config when a world is loaded.")
+            .comment("If disabled, the `spawn-limit` config in worlds.yml will be ignored.")
+            .comment("Disable this if you want paper-world.yml or another plugin to handle entity limits per world.")
+            .comment("!!!NOTE: This will only apply after a server restart!")
+            .defaultValue(true)
+            .name("apply-entity-spawn-limit")
+            .onChange(((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'apply-entity-spawn-limit' config option will only take" +
+                            " full effect after a server restart.")))
+            .build());
+
     final ConfigNode<Boolean> autoPurgeEntities = node(ConfigNode.builder("world.auto-purge-entities", Boolean.class)
             .comment("")
             .comment("Sets whether Multiverse will purge entities on world load based world's entity spawn config.")
@@ -187,7 +221,8 @@ final class CoreConfigNodes {
     final ConfigNode<PassengerModes> passengerMode = node(ConfigNode.builder("teleport.passenger-mode", PassengerModes.class)
             .comment("")
             .comment("Configures how passengers and vehicles are handled when an entity is teleported.")
-            .comment("  default: Server will handle passengers and vehicles, this usually means entities will not be teleported to a different world if they have passengers.")
+            .comment("  default: Server will handle passengers and vehicles. On papermc 1.21.10+, all will be retained by default.")
+            .comment("                                                       On older versions, all will be dismounted if world changes.")
             .comment("  dismount_passengers: Passengers will be removed from the parent entity before the teleport.")
             .comment("  dismount_vehicle: Vehicle will be removed and from the parent entity before the teleport.")
             .comment("  dismount_all: All passengers and vehicles will be removed from the parent entity before the teleport.")
@@ -365,12 +400,29 @@ final class CoreConfigNodes {
             .name("register-papi-hook")
             .build());
 
+    final ConfigNode<Boolean> warnInvalidPapiFormat = node(ConfigNode.builder("messaging.warn-invalid-papi-format", Boolean.class)
+            .comment("")
+            .comment("This config option defines whether or not Multiverse should warn about invalid PlaceholderAPI formats.")
+            .comment("Only applies if PlaceholderAPI is installed, and only to multiverse placeholders.")
+            .defaultValue(true)
+            .name("warn-invalid-papi-format")
+            .build());
+
+    final ConfigNode<Boolean> invalidPapiFormatReturnsBlank = node(ConfigNode.builder("messaging.invalid-papi-format-returns-blank", Boolean.class)
+            .comment("")
+            .comment("By default, invalid formats will return the original placeholder string.")
+            .comment("This config option defines whether or not Multiverse should show invalid PlaceholderAPI formats as blank.")
+            .comment("Only applies if PlaceholderAPI is installed, and only to multiverse placeholders.")
+            .defaultValue(false)
+            .name("invalid-papi-format-returns-blank")
+            .build());
+
     final ConfigNode<Locale> defaultLocale = node(ConfigNode.builder("messaging.default-locale", Locale.class)
             .comment("")
             .comment("This config option defines the default language Multiverse should use.")
             .defaultValue(Locale.ENGLISH)
             .name("default-locale")
-            .onSetValue((oldValue, newValue) ->
+            .onLoadAndChange((oldValue, newValue) ->
                     commandManager.get().getLocales().setDefaultLocale(newValue))
             .build());
 
@@ -380,9 +432,8 @@ final class CoreConfigNodes {
             .comment("If the player's language does not have a translation, it will use the default language set above instead.")
             .defaultValue(true)
             .name("per-player-locale")
-            .onSetValue((oldValue, newValue) -> {
-                commandManager.get().usePerIssuerLocale(newValue);
-            })
+            .onLoadAndChange((oldValue, newValue) ->
+                    commandManager.get().usePerIssuerLocale(newValue))
             .build());
 
     private final ConfigHeaderNode commandHeader = node(ConfigHeaderNode.builder("command")
@@ -398,6 +449,15 @@ final class CoreConfigNodes {
             .name("resolve-alias-name")
             .build());
 
+    final ConfigNode<Boolean> simplifiedDestinationTabCompletion = node(ConfigNode.builder("command.simplified-destination-tab-completion", Boolean.class)
+            .comment("")
+            .comment("If this is set to true, Multiverse will only suggest simple destination formats in tab completion.")
+            .comment("This means only world names will be suggested without other destination type such as `e:worldname:x,y,z` or `p:playername`.")
+            .comment("Note: This DOES NOT prevent players from using the destinations, as that is controlled by permissions.")
+            .defaultValue(false)
+            .name("simplified-destination-tab-completion")
+            .build());
+
     final ConfigNode<ConfirmMode> confirmMode = node(ConfigNode.builder("command.confirm-mode", ConfirmMode.class)
             .comment("")
             .comment("This config option defines whether `/mv confirm` is needed before running a DANGEROUS action.")
@@ -452,8 +512,11 @@ final class CoreConfigNodes {
             .comment("")
             .comment("This config option defines the priority for the PlayerPortalEvent.")
             .name("event-priority-player-portal")
-            .onSetValue((oldValue, newValue) ->
+            .onLoadAndChange((oldValue, newValue) ->
                     eventPriorityMapper.get().setPriority("mvcore-player-portal", newValue))
+            .onChange(((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'event-priority.player-portal' config option will only take " +
+                            "full effect after a server restart.")))
             .build());
 
     final ConfigNode<EventPriority> eventPriorityPlayerRespawn = node(ConfigNode.builder("event-priority.player-respawn", EventPriority.class)
@@ -461,16 +524,23 @@ final class CoreConfigNodes {
             .name("event-priority-player-respawn")
             .comment("")
             .comment("This config option defines the priority for the PlayerRespawnEvent.")
-            .onSetValue((oldValue, newValue) ->
+            .onLoadAndChange((oldValue, newValue) ->
                     eventPriorityMapper.get().setPriority("mvcore-player-respawn", newValue))
+            .onChange((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'event-priority.player-respawn' config option will only take " +
+                            "full effect after a server restart."))
             .build());
 
     final ConfigNode<EventPriority> eventPriorityPlayerSpawnLocation = node(ConfigNode.builder("event-priority.player-spawn-location", EventPriority.class)
             .defaultValue(EventPriority.NORMAL)
             .comment("")
             .comment("This config option defines the priority for the PlayerSpawnLocationEvent.")
-            .name("event-priority-player-spawn-location").onSetValue((oldValue, newValue) ->
+            .name("event-priority-player-spawn-location")
+            .onLoadAndChange((oldValue, newValue) ->
                     eventPriorityMapper.get().setPriority("mvcore-player-spawn-location", newValue))
+            .onChange((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'event-priority.player-spawn-location' config option will only take " +
+                            "full effect after a server restart."))
             .build());
 
     final ConfigNode<EventPriority> eventPriorityPlayerTeleport = node(ConfigNode.builder("event-priority.player-teleport", EventPriority.class)
@@ -478,8 +548,23 @@ final class CoreConfigNodes {
             .name("event-priority-player-teleport")
             .comment("")
             .comment("This config option defines the priority for the PlayerTeleportEvent.")
-            .onSetValue((oldValue, newValue) ->
+            .onLoadAndChange((oldValue, newValue) ->
                     eventPriorityMapper.get().setPriority("mvcore-player-teleport", newValue))
+            .onChange((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'event-priority.player-teleport' config option will only take " +
+                            "full effect after a server restart."))
+            .build());
+
+    final ConfigNode<EventPriority> eventPriorityPlayerWorldChange = node(ConfigNode.builder("event-priority.player-changed-world", EventPriority.class)
+            .defaultValue(EventPriority.NORMAL)
+            .name("event-priority-player-changed-world")
+            .comment("")
+            .comment("This config option defines the priority for the PlayerChangedWorldEvent.")
+            .onLoadAndChange((oldValue, newValue) ->
+                    eventPriorityMapper.get().setPriority("mvcore-player-changed-world", newValue))
+            .onChange((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'event-priority.player-changed-world' config option will only take " +
+                            "full effect after a server restart."))
             .build());
 
     private final ConfigHeaderNode miscHeader = node(ConfigHeaderNode.builder("misc")
@@ -492,6 +577,29 @@ final class CoreConfigNodes {
             .comment("Note: this config option needs a server restart to take effect.")
             .defaultValue("bukkit.yml")
             .name("bukkit-yml-path")
+            .onChange(((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'bukkit-yml-path' config option will only take " +
+                            "full effect after a server restart.")))
+            .build());
+
+    final ConfigNode<String> serverPropertiesPath = node(ConfigNode.builder("misc.server-properties-path", String.class)
+            .comment("")
+            .comment("Change this if you use a custom path for the server.properties file with `--config` startup flag.")
+            .comment("Note: this config option needs a server restart to take effect.")
+            .defaultValue("server.properties")
+            .name("server-properties-path")
+            .onChange(((sender, oldValue, newValue) ->
+                    sender.sendMessage(ChatColor.YELLOW + "'server-properties-path' config option will only take " +
+                            "full effect after a server restart.")))
+            .build());
+
+    final ConfigNode<Boolean> autoDetectGeneratorPlugins = node(ConfigNode.builder("misc.auto-detect-generator-plugins", Boolean.class)
+            .comment("")
+            .comment("When enabled, Multiverse will attempt to automatically detect world generator plugins installed on your server.")
+            .comment("This option only affects tab-completion within `/mv create` command and output of `/mv generators` command.")
+            .comment("Disabling this will not have any affect on the usages of world generator plugins itself.")
+            .defaultValue(true)
+            .name("auto-detect-generator-plugins")
             .build());
 
     final ConfigNode<Integer> globalDebug = node(ConfigNode.builder("misc.global-debug", Integer.class)
@@ -509,7 +617,7 @@ final class CoreConfigNodes {
             .validator(value -> (value < 0 || value > 3)
                     ? Try.failure(new MultiverseException("Debug level must be between 0 and 3."))
                     : Try.success(null))
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (newValue != Logging.getDebugLevel()) {
                     Logging.setDebugLevel(newValue);
                     pluginManager.callEvent(new MVDebugModeEvent(newValue));
@@ -518,11 +626,12 @@ final class CoreConfigNodes {
             .build());
 
     final ConfigNode<Boolean> debugPermissions = node(ConfigNode.builder("misc.debug-permissions", Boolean.class)
+            .comment("")
             .comment("Sets whether console will log every permission check done by all multiverse plugins.")
             .comment("This will only work if the above 'global-debug' is set to 1 or more.")
             .defaultValue(false)
             .name("debug-permissions")
-            .onSetValue((oldValue, newValue) -> PermissionUtils.setDebugPermissions(newValue))
+            .onLoadAndChange((oldValue, newValue) -> PermissionUtils.setDebugPermissions(newValue))
             .build());
 
     final ConfigNode<Boolean> silentStart = node(ConfigNode.builder("misc.silent-start", Boolean.class)
@@ -530,12 +639,13 @@ final class CoreConfigNodes {
             .comment("If true, the startup console messages will no longer show.")
             .defaultValue(false)
             .name("silent-start")
-            .onSetValue((oldValue, newValue) -> Logging.setShowingConfig(!newValue))
+            .onLoadAndChange((oldValue, newValue) -> Logging.setShowingConfig(!newValue))
             .build());
 
     final ConfigNode<Boolean> showDonationMessage = node(ConfigNode.builder("misc.show-donation-message", Boolean.class)
             .comment("")
             .comment("If you don't want to donate, you can set this to false and Multiverse will stop nagging you.")
+            .comment("But if you want to donate, here is our Github Sponsors page: https://github.com/sponsors/Multiverse")
             .defaultValue(true)
             .name("show-donation-message")
             .build());

src/main/java/org/mvplugins/multiverse/core/config/handle/BaseConfigurationHandle.java

@@ -3,19 +3,22 @@ package org.mvplugins.multiverse.core.config.handle;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.logging.Logger;
 
 import com.dumptruckman.minecraft.util.Logging;
 import io.vavr.control.Option;
 import io.vavr.control.Try;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.plugin.Plugin;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import org.mvplugins.multiverse.core.config.migration.ConfigMigrator;
 import org.mvplugins.multiverse.core.config.node.ListValueNode;
-import org.mvplugins.multiverse.core.config.node.Node;
 import org.mvplugins.multiverse.core.config.node.NodeGroup;
 import org.mvplugins.multiverse.core.config.node.ValueNode;
 
@@ -84,7 +87,8 @@ public abstract class BaseConfigurationHandle<C extends ConfigurationSection> {
         });
 
         nodeValueMap.forEach((valueNode, value) -> {
-            valueNode.onSetValue(value, value);
+            valueNode.onLoad(value);
+            valueNode.onLoadAndChange(Bukkit.getConsoleSender(), null, value);
         });
     }
 
@@ -156,10 +160,27 @@ public abstract class BaseConfigurationHandle<C extends ConfigurationSection> {
      * @return Empty try if the value was set, try containing an error otherwise.
      */
     public <T> Try<Void> set(@NotNull ValueNode<T> node, T value) {
+        return set(Bukkit.getConsoleSender(), node, value);
+    }
+
+    /**
+     * Sets the value of a node, if the validator is not null, it will be tested first.
+     *
+     * @param sender The sender who triggered the change.
+     * @param node   The node to set the value of.
+     * @param value  The value to set.
+     * @param <T>    The type of the node value.
+     * @return Empty try if the value was set, try containing an error otherwise.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    public <T> Try<Void> set(@NotNull CommandSender sender, @NotNull ValueNode<T> node, T value) {
         return node.validate(value).map(ignore -> {
             T oldValue = get(node);
             nodeValueMap.put(node, value);
-            node.onSetValue(oldValue, get(node));
+            node.onLoadAndChange(sender, oldValue, value);
+            node.onChange(sender, oldValue, value);
             return null;
         });
     }

src/main/java/org/mvplugins/multiverse/core/config/handle/StringPropertyHandle.java

@@ -226,7 +226,7 @@ public class StringPropertyHandle {
     public Try<Void> setPropertyString(@NotNull CommandSender sender, @Nullable String name, @Nullable String value) {
         return findNode(name, ValueNode.class)
                 .flatMap(node -> node.parseFromString(sender, value)
-                        .flatMap(parsedValue -> handle.set(node, parsedValue)));
+                        .flatMap(parsedValue -> handle.set(sender, node, parsedValue)));
     }
 
     /**

src/main/java/org/mvplugins/multiverse/core/config/node/ConfigNode.java

@@ -14,6 +14,9 @@ import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import org.mvplugins.multiverse.core.config.node.functions.NodeChangeCallback;
+import org.mvplugins.multiverse.core.config.node.functions.NodeValueCallback;
+import org.mvplugins.multiverse.core.config.node.functions.SenderNodeChangeCallback;
 import org.mvplugins.multiverse.core.config.node.functions.SenderNodeStringParser;
 import org.mvplugins.multiverse.core.config.node.functions.SenderNodeSuggester;
 import org.mvplugins.multiverse.core.config.node.serializer.DefaultSerializerProvider;
@@ -53,7 +56,9 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
     protected @Nullable NodeStringParser<T> stringParser;
     protected @Nullable NodeSerializer<T> serializer;
     protected @Nullable Function<T, Try<Void>> validator;
-    protected @Nullable BiConsumer<T, T> onSetValue;
+    protected @Nullable NodeValueCallback<T> onLoad;
+    protected @Nullable NodeChangeCallback<T> onLoadAndChange;
+    protected @Nullable NodeChangeCallback<T> onChange;
 
     protected ConfigNode(
             @NotNull String path,
@@ -66,7 +71,9 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
             @Nullable NodeStringParser<T> stringParser,
             @Nullable NodeSerializer<T> serializer,
             @Nullable Function<T, Try<Void>> validator,
-            @Nullable BiConsumer<T, T> onSetValue) {
+            @Nullable NodeValueCallback<T> onLoad,
+            @Nullable NodeChangeCallback<T> onLoadAndChange,
+            @Nullable NodeChangeCallback<T> onChange) {
         super(path, comments);
         this.name = name;
         this.type = type;
@@ -82,7 +89,9 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
                 ? serializer
                 : DefaultSerializerProvider.getDefaultSerializer(type);
         this.validator = validator;
-        this.onSetValue = onSetValue;
+        this.onLoad = onLoad;
+        this.onLoadAndChange = onLoadAndChange;
+        this.onChange = onChange;
     }
 
     /**
@@ -186,9 +195,29 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
      * {@inheritDoc}
      */
     @Override
-    public void onSetValue(@Nullable T oldValue, @Nullable T newValue) {
-        if (onSetValue != null) {
-            onSetValue.accept(oldValue, newValue);
+    public void onLoad(@Nullable T value) {
+        if (onLoad != null) {
+            onLoad.run(value);
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void onLoadAndChange(@NotNull CommandSender sender, @Nullable T oldValue, @Nullable T newValue) {
+        if (onLoadAndChange != null) {
+            onLoadAndChange.run(sender, oldValue, newValue);
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void onChange(@NotNull CommandSender sender, @Nullable T oldValue, @Nullable T newValue) {
+        if (onChange != null) {
+            onChange.run(sender, oldValue, newValue);
         }
     }
 
@@ -208,7 +237,9 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
         protected @Nullable NodeStringParser<T> stringParser;
         protected @Nullable NodeSerializer<T> serializer;
         protected @Nullable Function<T, Try<Void>> validator;
-        protected @Nullable BiConsumer<T, T> onSetValue;
+        protected @Nullable NodeValueCallback<T> onLoad;
+        protected @Nullable NodeChangeCallback<T> onLoadAndChange;
+        protected @Nullable NodeChangeCallback<T> onChange;
 
         /**
          * Creates a new builder.
@@ -368,15 +399,83 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
             return self();
         }
 
+        /**
+         * Sets the action to be performed when the value is loaded.
+         *
+         * @param onLoad    The action to be performed.
+         * @return This builder.
+         */
+        @ApiStatus.AvailableSince("5.4")
+        public @NotNull B onLoad(@NotNull NodeValueCallback<T> onLoad) {
+            this.onLoad = this.onLoad == null ? onLoad : this.onLoad.then(onLoad);
+            return self();
+        }
+
+        /**
+         * Sets the action to be performed when the value is loaded and changed.
+         *
+         * @param onLoadAndChange    The action to be performed.
+         * @return This builder.
+         *
+         * @since 5.4
+         */
+        @ApiStatus.AvailableSince("5.4")
+        public @NotNull B onLoadAndChange(@NotNull NodeChangeCallback<T> onLoadAndChange) {
+            this.onLoadAndChange = this.onLoadAndChange == null ? onLoadAndChange : this.onLoadAndChange.then(onLoadAndChange);
+            return self();
+        }
+
+        /**
+         * Sets the action to be performed when the value is loaded and changed.
+         *
+         * @param onLoadAndChange    The action to be performed.
+         * @return This builder.
+         *
+         * @since 5.4
+         */
+        @ApiStatus.AvailableSince("5.4")
+        public @NotNull B onLoadAndChange(@NotNull SenderNodeChangeCallback<T> onLoadAndChange) {
+            return onLoadAndChange((NodeChangeCallback<T>) onLoadAndChange);
+        }
+
+        /**
+         * Sets the action to be performed when the value is changed.
+         *
+         * @param onChange    The action to be performed.
+         * @return This builder.
+         *
+         * @since 5.4
+         */
+        @ApiStatus.AvailableSince("5.4")
+        public @NotNull B onChange(@NotNull NodeChangeCallback<T> onChange) {
+            this.onChange = this.onChange == null ? onChange : this.onChange.then(onChange);
+            return self();
+        }
+
+        /**
+         * Sets the action to be performed when the value is changed.
+         *
+         * @param onChange    The action to be performed.
+         * @return This builder.
+         *
+         * @since 5.4
+         */
+        @ApiStatus.AvailableSince("5.4")
+        public @NotNull B onChange(@NotNull SenderNodeChangeCallback<T> onChange) {
+            return onChange((NodeChangeCallback<T>) onChange);
+        }
+
         /**
          * Sets the action to be performed when the value is set.
          *
          * @param onSetValue    The action to be performed.
          * @return This builder.
+         *
+         * @deprecated Use {@link #onLoadAndChange(NodeChangeCallback)} instead.
          */
+        @Deprecated(since = "5.4", forRemoval = true)
         public @NotNull B onSetValue(@NotNull BiConsumer<T, T> onSetValue) {
-            this.onSetValue = this.onSetValue == null ? onSetValue : this.onSetValue.andThen(onSetValue);
-            return self();
+            return onLoadAndChange(onSetValue::accept);
         }
 
         /**
@@ -385,7 +484,8 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
         @Override
         public @NotNull ConfigNode<T> build() {
             return new ConfigNode<>(path, comments.toArray(new String[0]),
-                    name, type, aliases, defaultValue, suggester, stringParser, serializer, validator, onSetValue);
+                    name, type, aliases, defaultValue, suggester, stringParser, serializer, validator,
+                    onLoad, onLoadAndChange, onChange);
         }
     }
 }

src/main/java/org/mvplugins/multiverse/core/config/node/ListConfigNode.java

@@ -19,6 +19,8 @@ import org.jetbrains.annotations.Nullable;
 
 import org.mvplugins.multiverse.core.config.node.functions.DefaultStringParserProvider;
 import org.mvplugins.multiverse.core.config.node.functions.DefaultSuggesterProvider;
+import org.mvplugins.multiverse.core.config.node.functions.NodeChangeCallback;
+import org.mvplugins.multiverse.core.config.node.functions.NodeValueCallback;
 import org.mvplugins.multiverse.core.config.node.functions.NodeStringParser;
 import org.mvplugins.multiverse.core.config.node.functions.NodeSuggester;
 import org.mvplugins.multiverse.core.config.node.functions.SenderNodeStringParser;
@@ -67,7 +69,9 @@ public class ListConfigNode<I> extends ConfigNode<List<I>> implements ListValueN
             @Nullable NodeStringParser<List<I>> stringParser,
             @Nullable NodeSerializer<List<I>> serializer,
             @Nullable Function<List<I>, Try<Void>> validator,
-            @Nullable BiConsumer<List<I>, List<I>> onSetValue,
+            @Nullable NodeValueCallback<List<I>> onLoad,
+            @Nullable NodeChangeCallback<List<I>> onLoadAndChange,
+            @Nullable NodeChangeCallback<List<I>> onChange,
             @NotNull Class<I> itemType,
             @Nullable NodeSuggester itemSuggester,
             @Nullable NodeStringParser<I> itemStringParser,
@@ -75,7 +79,7 @@ public class ListConfigNode<I> extends ConfigNode<List<I>> implements ListValueN
             @Nullable Function<I, Try<Void>> itemValidator,
             @Nullable BiConsumer<I, I> onSetItemValue) {
         super(path, comments, name, type, aliases, defaultValueSupplier, suggester, stringParser, serializer,
-                validator, onSetValue);
+                validator, onLoad, onLoadAndChange, onChange);
         this.itemType = itemType;
         this.itemSuggester = itemSuggester != null
                 ? itemSuggester
@@ -105,8 +109,8 @@ public class ListConfigNode<I> extends ConfigNode<List<I>> implements ListValueN
         if (this.itemSerializer != null && this.serializer == null) {
             setDefaultSerialiser();
         }
-        if (this.onSetItemValue != null && this.onSetValue == null) {
-            setDefaultOnSetValue();
+        if (this.onSetItemValue != null && this.onLoadAndChange == null) {
+            setDefaultOnLoadAndChange();
         }
         if (this.defaultValue == null) {
             this.defaultValue = ArrayList::new;
@@ -116,9 +120,9 @@ public class ListConfigNode<I> extends ConfigNode<List<I>> implements ListValueN
     private void setDefaultSuggester() {
         if (itemSuggester instanceof SenderNodeSuggester senderItemSuggester) {
             this.suggester = (SenderNodeSuggester)(sender, input) ->
-                    StringFormatter.addonToCommaSeperated(input, senderItemSuggester.suggest(sender, input));
+                    StringFormatter.addOnToCommaSeparated(input, senderItemSuggester.suggest(sender, input));
         } else {
-            this.suggester = input -> StringFormatter.addonToCommaSeperated(input, itemSuggester.suggest(input));
+            this.suggester = input -> StringFormatter.addOnToCommaSeparated(input, itemSuggester.suggest(input));
         }
     }
 
@@ -168,8 +172,8 @@ public class ListConfigNode<I> extends ConfigNode<List<I>> implements ListValueN
         };
     }
 
-    private void setDefaultOnSetValue() {
-        this.onSetValue = (oldValue, newValue) -> {
+    private void setDefaultOnLoadAndChange() {
+        this.onLoadAndChange = (oldValue, newValue) -> {
             if (oldValue != null) {
                 oldValue.stream()
                         .filter(value -> !newValue.contains(value))
@@ -381,7 +385,9 @@ public class ListConfigNode<I> extends ConfigNode<List<I>> implements ListValueN
                     stringParser,
                     serializer,
                     validator,
-                    onSetValue,
+                    onLoad,
+                    onLoadAndChange,
+                    onChange,
                     itemType,
                     itemSuggester,
                     itemStringParser,

src/main/java/org/mvplugins/multiverse/core/config/node/ValueNode.java

@@ -5,11 +5,13 @@ import java.util.Collection;
 import io.vavr.control.Option;
 import io.vavr.control.Try;
 import org.apache.logging.log4j.util.Strings;
+import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import org.mvplugins.multiverse.core.config.handle.BaseConfigurationHandle;
 import org.mvplugins.multiverse.core.config.node.serializer.NodeSerializer;
 
 public interface ValueNode<T> extends Node {
@@ -108,11 +110,51 @@ public interface ValueNode<T> extends Node {
      */
     Try<Void> validate(@Nullable T value);
 
+    /**
+     * Called when the value of this node is loaded by {@link BaseConfigurationHandle#load()}.
+     *
+     * @param value The loaded value.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    void onLoad(@Nullable T value);
+
+    /**
+     * Called when the value of this node is loaded or changed.
+     *
+     * @param sender   The sender who triggered the change. If triggered by loading or no target sender is specified,
+     *                 it will be the console sender.
+     * @param oldValue The old value, will always be null on load.
+     * @param newValue The new value.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    void onLoadAndChange(@NotNull CommandSender sender, @Nullable T oldValue, @Nullable T newValue);
+
+    /**
+     * Called when the value of this node is changed by {@link BaseConfigurationHandle#set(ValueNode, Object)}.
+     *
+     * @param sender    The sender who changed the value, or console sender if no target sender specified.
+     * @param oldValue  The old value.
+     * @param newValue  The new value.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    void onChange(@NotNull CommandSender sender, @Nullable T oldValue, @Nullable T newValue);
+
     /**
      * Called when the value of this node is set.
      *
      * @param oldValue The old value.
      * @param newValue The new value.
+     *
+     * @deprecated Use {@link #onLoadAndChange(CommandSender, Object, Object)} instead.
      */
-    void onSetValue(@Nullable T oldValue, @Nullable T newValue);
+    @Deprecated(since = "5.4", forRemoval = true)
+    default void onSetValue(@Nullable T oldValue, @Nullable T newValue) {
+        onLoadAndChange(Bukkit.getConsoleSender(), oldValue, newValue);
+    }
 }

src/main/java/org/mvplugins/multiverse/core/config/node/functions/DefaultStringParserProvider.java

@@ -1,6 +1,7 @@
 package org.mvplugins.multiverse.core.config.node.functions;
 
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 
 import co.aikar.commands.ACFUtil;
@@ -41,13 +42,13 @@ public final class DefaultStringParserProvider {
     }
 
     private static final NodeStringParser<Enum> ENUM_STRING_PARSER = (input, type) -> Try.of(
-            () -> Enum.valueOf(type, input.toUpperCase()));
+            () -> Enum.valueOf(type, input.toUpperCase(Locale.ENGLISH)));
 
     private static final NodeStringParser<String> STRING_STRING_PARSER = (input, type) -> Try.of(
             () -> input);
 
     private static final NodeStringParser<Boolean> BOOLEAN_STRING_PARSER = (input, type) -> Try.of(
-            () -> switch (String.valueOf(input).toLowerCase()) {
+            () -> switch (String.valueOf(input).toLowerCase(Locale.ENGLISH)) {
                 case "t", "true", "on", "y", "yes", "1", "allow" -> true;
                 case "f", "false", "off", "n", "no", "0", "deny" -> false;
                 default -> throw new MultiverseException("Unable to convert '" + input + "' to boolean. Please use 'true' or 'false'");

src/main/java/org/mvplugins/multiverse/core/config/node/functions/DefaultSuggesterProvider.java

@@ -3,6 +3,7 @@ package org.mvplugins.multiverse.core.config.node.functions;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
@@ -43,7 +44,7 @@ public final class DefaultSuggesterProvider {
     private static NodeSuggester enumSuggester(Class<?> clazz) {
         return input -> Arrays.stream(clazz.getEnumConstants())
                 .map(Object::toString)
-                .map(String::toLowerCase)
+                .map(name -> name.toLowerCase(Locale.ENGLISH))
                 .collect(Collectors.toList());
     }
 

src/main/java/org/mvplugins/multiverse/core/config/node/functions/NodeChangeCallback.java

@@ -0,0 +1,65 @@
+package org.mvplugins.multiverse.core.config.node.functions;
+
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.ApiStatus;
+
+/**
+ * A callback interface for handling changes to configuration node values.
+ *
+ * @param <T> The type of the node value.
+ *
+ * @since 5.4
+ */
+@ApiStatus.AvailableSince("5.4")
+@FunctionalInterface
+public interface NodeChangeCallback<T> {
+    /**
+     * Called when the value of a node changes.
+     *
+     * @param oldValue The old value of the node.
+     * @param newValue The new value of the node.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    void run(T oldValue, T newValue);
+
+    /**
+     * Called when the value of a node changes, with the sender of the change.
+     *
+     * @param sender   The sender of the change.
+     * @param oldValue The old value of the node.
+     * @param newValue The new value of the node.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    default void run(CommandSender sender, T oldValue, T newValue) {
+        run(oldValue, newValue);
+    }
+
+    /**
+     * Chains another {@link NodeChangeCallback} to be executed after this one.
+     *
+     * @param after The callback to execute after this one.
+     * @return A new {@link NodeChangeCallback} that executes both callbacks in order.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    default NodeChangeCallback<T> then(NodeChangeCallback<T> after) {
+        return new SenderNodeChangeCallback<T>() {
+            @Override
+            public void run(CommandSender sender, T oldValue, T newValue) {
+                NodeChangeCallback.this.run(sender, oldValue, newValue);
+                after.run(sender, oldValue, newValue);
+            }
+
+            @Override
+            public void run(T oldValue, T newValue) {
+                NodeChangeCallback.this.run(oldValue, newValue);
+                after.run(oldValue, newValue);
+            }
+        };
+    }
+}

src/main/java/org/mvplugins/multiverse/core/config/node/functions/NodeValueCallback.java

@@ -0,0 +1,38 @@
+package org.mvplugins.multiverse.core.config.node.functions;
+
+import org.jetbrains.annotations.ApiStatus;
+
+/**
+ * Handler called when an action is performed on a node such as loading.
+ *
+ * @since 5.4
+ */
+@ApiStatus.AvailableSince("5.4")
+@FunctionalInterface
+public interface NodeValueCallback<T> {
+    /**
+     * Called when an action is performed on a node.
+     *
+     * @param value The value of the node.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    void run(T value);
+
+    /**
+     * Chains another {@link NodeValueCallback} to be executed after this one.
+     *
+     * @param after The callback to execute after this one.
+     * @return A new {@link NodeValueCallback} that executes both callbacks in order.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    default NodeValueCallback<T> then(NodeValueCallback<T> after) {
+        return (T value) -> {
+            this.run(value);
+            after.run(value);
+        };
+    }
+}

src/main/java/org/mvplugins/multiverse/core/config/node/functions/SenderNodeChangeCallback.java

@@ -0,0 +1,31 @@
+package org.mvplugins.multiverse.core.config.node.functions;
+
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.ApiStatus;
+
+/**
+ * A callback interface for handling changes to configuration node values with contextual information from the sender.
+ *
+ * @param <T> The type of the node value.
+ *
+ * @since 5.4
+ */
+@ApiStatus.AvailableSince("5.4")
+@FunctionalInterface
+public interface SenderNodeChangeCallback<T> extends NodeChangeCallback<T> {
+    /**
+     * {@inheritDoc}
+     */
+    @ApiStatus.AvailableSince("5.4")
+    void run(CommandSender sender, T oldValue, T newValue);
+
+    /**
+     * {@inheritDoc}
+     */
+    @ApiStatus.AvailableSince("5.4")
+    @Override
+    default void run(T oldValue, T newValue) {
+        run(Bukkit.getConsoleSender(), oldValue, newValue);
+    }
+}

src/main/java/org/mvplugins/multiverse/core/config/node/functions/SenderNodeStringParser.java

@@ -11,8 +11,11 @@ import org.jetbrains.annotations.Nullable;
  * A function that parses a string into a node value object of type {@link T} with contextual information from the sender.
  *
  * @param <T>   The type of the object to parse.
+ *
+ * @since 5.1
  */
 @ApiStatus.AvailableSince("5.1")
+@FunctionalInterface
 public interface SenderNodeStringParser<T> extends NodeStringParser<T> {
     /**
      * Parses a string into a node value object of type {@link T} with contextual information from the sender.

src/main/java/org/mvplugins/multiverse/core/config/node/serializer/DefaultSerializerProvider.java

@@ -48,12 +48,12 @@ public final class DefaultSerializerProvider {
             if (type.isInstance(object)) {
                 return (Enum<?>) object;
             }
-            return Enum.valueOf(type, String.valueOf(object).toUpperCase());
+            return Enum.valueOf(type, String.valueOf(object).toUpperCase(Locale.ENGLISH));
         }
 
         @Override
         public Object serialize(Enum object, Class<Enum> type) {
-            return object.name().toLowerCase();
+            return object.name().toLowerCase(Locale.ENGLISH);
         }
     };
 
@@ -80,7 +80,7 @@ public final class DefaultSerializerProvider {
             }
             String input = String.valueOf(object);
             //todo: this is a copy from string parser
-            return switch (input.toLowerCase()) {
+            return switch (input.toLowerCase(Locale.ENGLISH)) {
                 case "t", "true", "on", "y", "yes", "1", "allow" -> true;
                 case "f", "false", "off", "n", "no", "0", "deny" -> false;
                 default -> throw new RuntimeException("Unable to convert '" + input + "' to boolean.");

src/main/java/org/mvplugins/multiverse/core/destination/DestinationInstance.java

@@ -4,8 +4,9 @@ import io.vavr.control.Option;
 import org.bukkit.Location;
 import org.bukkit.entity.Entity;
 import org.bukkit.util.Vector;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
-import org.mvplugins.multiverse.core.utils.result.FailureReason;
+import org.mvplugins.multiverse.core.locale.message.Message;
 import org.mvplugins.multiverse.core.world.location.UnloadedWorldLocation;
 
 /**
@@ -79,6 +80,20 @@ public abstract class DestinationInstance<I extends  DestinationInstance<I, T>,
      */
     public abstract @NotNull Option<String> getFinerPermissionSuffix();
 
+    /**
+     * Gets a user-friendly display text for this destination instance. This is used when displaying the destination
+     * to the player. By default, this returns the same as {@link #toString()}. Override this method to provide a more
+     * user-friendly display text with colors, formatting and localization support.
+     *
+     * @return The display message.
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    @NotNull
+    public Message getDisplayMessage() {
+        return Message.of(this.toString());
+    }
+
     /**
      * Serialises the destination instance to a savable string.
      *

src/main/java/org/mvplugins/multiverse/core/destination/core/AnchorDestinationInstance.java

@@ -7,6 +7,7 @@ import org.bukkit.util.Vector;
 import org.jetbrains.annotations.NotNull;
 
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
+import org.mvplugins.multiverse.core.locale.message.Message;
 
 /**
  * Destination instance implementation for the {@link AnchorDestination}.
@@ -63,6 +64,15 @@ public final class AnchorDestinationInstance extends DestinationInstance<AnchorD
         return Option.of(anchorName);
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Message getDisplayMessage() {
+        //TODO Localize
+        return Message.of("anchor '" + anchorName + "'");
+    }
+
     /**
      * {@inheritDoc}
      */

src/main/java/org/mvplugins/multiverse/core/destination/core/BedDestination.java

@@ -6,7 +6,7 @@ import java.util.stream.Collectors;
 
 import co.aikar.locales.MessageKey;
 import co.aikar.locales.MessageKeyProvider;
-import org.bukkit.Bukkit;
+import jakarta.inject.Inject;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
@@ -20,8 +20,7 @@ import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.utils.PlayerFinder;
 import org.mvplugins.multiverse.core.utils.result.Attempt;
 import org.mvplugins.multiverse.core.utils.result.FailureReason;
-
-import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+import org.mvplugins.multiverse.core.world.helpers.ConcurrentPlayerWorldTracker;
 
 /**
  * {@link Destination} implementation for beds.
@@ -30,7 +29,11 @@ import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.re
 public final class BedDestination implements Destination<BedDestination, BedDestinationInstance, BedDestination.InstanceFailureReason> {
     static final String OWN_BED_STRING = "playerbed";
 
-    BedDestination() {
+    private final ConcurrentPlayerWorldTracker worldTracker;
+
+    @Inject
+    BedDestination(@NotNull ConcurrentPlayerWorldTracker worldTracker) {
+        this.worldTracker = worldTracker;
     }
 
     /**
@@ -62,8 +65,8 @@ public final class BedDestination implements Destination<BedDestination, BedDest
     @Override
     public @NotNull Collection<DestinationSuggestionPacket> suggestDestinations(
             @NotNull CommandSender sender, @Nullable String destinationParams) {
-        List<DestinationSuggestionPacket> collect = Bukkit.getOnlinePlayers().stream()
-                .map(player -> new DestinationSuggestionPacket(this, player.getName(), player.getName()))
+        List<DestinationSuggestionPacket> collect = worldTracker.getOnlinePlayers().stream()
+                .map(player -> new DestinationSuggestionPacket(this, player, player))
                 .collect(Collectors.toList());
         if (sender instanceof Player) {
             collect.add(new DestinationSuggestionPacket(this, OWN_BED_STRING, OWN_BED_STRING));

src/main/java/org/mvplugins/multiverse/core/destination/core/BedDestinationInstance.java

@@ -9,12 +9,13 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
+import org.mvplugins.multiverse.core.locale.message.Message;
 
 /**
  * Destination instance implementation for the {@link BedDestination}.
  */
 public final class BedDestinationInstance extends DestinationInstance<BedDestinationInstance, BedDestination> {
-    private final Player player;
+    private final @Nullable Player player;
 
     /**
      * Constructor.
@@ -64,6 +65,15 @@ public final class BedDestinationInstance extends DestinationInstance<BedDestina
         return Option.of(player != null ? player.getName() : BedDestination.OWN_BED_STRING);
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Message getDisplayMessage() {
+        //TODO Localize
+        return Message.of(player == null ? "your bed/respawn point" : player.getName() + "'s bed/respawn point");
+    }
+
     /**
      * {@inheritDoc}
      */

src/main/java/org/mvplugins/multiverse/core/destination/core/ExactDestination.java

@@ -19,14 +19,15 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.destination.Destination;
 import org.mvplugins.multiverse.core.destination.DestinationSuggestionPacket;
+import org.mvplugins.multiverse.core.exceptions.utils.position.PositionParseException;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.utils.REPatterns;
+import org.mvplugins.multiverse.core.utils.position.EntityPosition;
 import org.mvplugins.multiverse.core.utils.result.Attempt;
 import org.mvplugins.multiverse.core.utils.result.FailureReason;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.entrycheck.WorldEntryCheckerProvider;
-import org.mvplugins.multiverse.core.world.location.UnloadedWorldLocation;
 
 import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.*;
 
@@ -62,7 +63,12 @@ public final class ExactDestination implements Destination<ExactDestination, Exa
      * @return A new {@link ExactDestinationInstance}
      */
     public @NotNull ExactDestinationInstance fromLocation(@NotNull Location location) {
-        return new ExactDestinationInstance(this, new UnloadedWorldLocation(location));
+        return new ExactDestinationInstance(
+                this,
+                worldManager,
+                location.getWorld().getName(),
+                EntityPosition.ofLocation(location)
+        );
     }
 
     /**
@@ -73,12 +79,17 @@ public final class ExactDestination implements Destination<ExactDestination, Exa
             @NotNull CommandSender sender,
             @NotNull String destinationParams
     ) {
-        String[] items = REPatterns.COLON.split(destinationParams);
+        String[] items = REPatterns.COLON.split(destinationParams, 2);
         if (items.length < 2) {
             if (items[0].equals("@here")) {
                 return getLocationFromSender(sender)
                         .map(location -> Attempt.<ExactDestinationInstance, InstanceFailureReason>success(
-                                new ExactDestinationInstance(this, new UnloadedWorldLocation(location))
+                                new ExactDestinationInstance(
+                                        this,
+                                        worldManager,
+                                        location.getWorld().getName(),
+                                        EntityPosition.ofLocation(location)
+                                )
                         ))
                         .getOrElse(() -> Attempt.failure(InstanceFailureReason.INVALID_COORDINATES_FORMAT)); // todo: specific failure reason for this case
             }
@@ -86,41 +97,21 @@ public final class ExactDestination implements Destination<ExactDestination, Exa
         }
 
         String worldName = items[0];
-        String coordinates = items[1];
-        String[] coordinatesParams = REPatterns.COMMA.split(coordinates);
-        if (coordinatesParams.length != 3) {
-            return Attempt.failure(InstanceFailureReason.INVALID_COORDINATES_FORMAT);
-        }
+        String positionStr = items[1];
 
         World world = getLoadedMultiverseWorld(worldName).flatMap(LoadedMultiverseWorld::getBukkitWorld).getOrNull();
         if (world == null) {
             return Attempt.failure(InstanceFailureReason.WORLD_NOT_FOUND, Replace.WORLD.with(worldName));
         }
 
-        UnloadedWorldLocation location;
+        EntityPosition position;
         try {
-            location = new UnloadedWorldLocation(
-                    world,
-                    Double.parseDouble(coordinatesParams[0]),
-                    Double.parseDouble(coordinatesParams[1]),
-                    Double.parseDouble(coordinatesParams[2])
-            );
-        } catch (NumberFormatException e) {
+            position = EntityPosition.fromString(positionStr);
+        } catch (PositionParseException e) {
             return Attempt.failure(InstanceFailureReason.INVALID_NUMBER_FORMAT, Replace.ERROR.with(e));
         }
 
-        if (items.length == 4) {
-            String pitch = items[2];
-            String yaw = items[3];
-            try {
-                location.setPitch(Float.parseFloat(pitch));
-                location.setYaw(Float.parseFloat(yaw));
-            } catch (NumberFormatException e) {
-                return Attempt.failure(InstanceFailureReason.INVALID_NUMBER_FORMAT, Replace.ERROR.with(e));
-            }
-        }
-
-        return Attempt.success(new ExactDestinationInstance(this, location));
+        return Attempt.success(new ExactDestinationInstance(this, worldManager, worldName, position));
     }
 
     //TODO: Extract to a world finder class

src/main/java/org/mvplugins/multiverse/core/destination/core/ExactDestinationInstance.java

@@ -1,6 +1,7 @@
 package org.mvplugins.multiverse.core.destination.core;
 
 import io.vavr.control.Option;
+import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.World;
 import org.bukkit.entity.Entity;
@@ -8,22 +9,34 @@ import org.bukkit.util.Vector;
 import org.jetbrains.annotations.NotNull;
 
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
-import org.mvplugins.multiverse.core.world.location.UnloadedWorldLocation;
+import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.utils.position.EntityPosition;
+import org.mvplugins.multiverse.core.world.MultiverseWorld;
+import org.mvplugins.multiverse.core.world.WorldManager;
 
 /**
  * Destination instance implementation for the {@link ExactDestination}.
  */
 public final class ExactDestinationInstance extends DestinationInstance<ExactDestinationInstance, ExactDestination> {
-    private final UnloadedWorldLocation location;
+    private final WorldManager worldManager;
+    private final String worldName;
+    private final EntityPosition position;
 
     /**
      * Constructor.
      *
-     * @param location The location to teleport to.
+     * @param destination The parent destination.
+     * @param worldName   The name of the world.
+     * @param position    The position in the world.
      */
-    ExactDestinationInstance(@NotNull ExactDestination destination, @NotNull UnloadedWorldLocation location) {
+    ExactDestinationInstance(@NotNull ExactDestination destination,
+                             @NotNull WorldManager worldManager,
+                             @NotNull String worldName,
+                             @NotNull EntityPosition position) {
         super(destination);
-        this.location = location;
+        this.worldManager = worldManager;
+        this.worldName = worldName;
+        this.position = position;
     }
 
     /**
@@ -31,10 +44,13 @@ public final class ExactDestinationInstance extends DestinationInstance<ExactDes
      */
     @Override
     public @NotNull Option<Location> getLocation(@NotNull Entity teleportee) {
-        if (location.getWorld() == null) {
+        World world = Bukkit.getWorld(worldName);
+        if (world == null) {
             return Option.none();
         }
-        return Option.of(location.toBukkitLocation());
+        Location destinationLocation = position.toBukkitLocation(teleportee.getLocation());
+        destinationLocation.setWorld(world);
+        return Option.of(destinationLocation);
     }
 
     /**
@@ -58,7 +74,18 @@ public final class ExactDestinationInstance extends DestinationInstance<ExactDes
      */
     @Override
     public @NotNull Option<String> getFinerPermissionSuffix() {
-        return Option.of(location.getWorld()).map(World::getName);
+        return Option.of(worldName);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Message getDisplayMessage() {
+        String displayWorldName = worldManager.getWorld(worldName)
+                .map(MultiverseWorld::getAliasOrName)
+                .getOrElse(worldName);
+        return Message.of(displayWorldName + " at " + position.toString());
     }
 
     /**
@@ -66,7 +93,6 @@ public final class ExactDestinationInstance extends DestinationInstance<ExactDes
      */
     @Override
     public @NotNull String serialise() {
-        return location.getWorldName() + ":" + location.getX() + "," + location.getY()
-                + "," + location.getZ() + ":" + location.getPitch() + ":" + location.getYaw();
+        return worldName + ":" + position.toString();
     }
 }

src/main/java/org/mvplugins/multiverse/core/destination/core/PlayerDestination.java

@@ -4,7 +4,7 @@ import java.util.Collection;
 
 import co.aikar.locales.MessageKey;
 import co.aikar.locales.MessageKeyProvider;
-import org.bukkit.Bukkit;
+import jakarta.inject.Inject;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
@@ -14,21 +14,26 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.destination.Destination;
 import org.mvplugins.multiverse.core.destination.DestinationSuggestionPacket;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
-import org.mvplugins.multiverse.core.locale.message.MessageReplacement;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.utils.PlayerFinder;
 import org.mvplugins.multiverse.core.utils.result.Attempt;
 import org.mvplugins.multiverse.core.utils.result.FailureReason;
+import org.mvplugins.multiverse.core.world.helpers.ConcurrentPlayerWorldTracker;
 
 /**
  * {@link Destination} implementation for players.s
  */
 @Service
 public final class PlayerDestination implements Destination<PlayerDestination, PlayerDestinationInstance, PlayerDestination.InstanceFailureReason> {
+
+    private final ConcurrentPlayerWorldTracker playerWorldTracker;
+
     /**
      * Creates a new instance of the PlayerDestination.
      */
-    PlayerDestination() {
+    @Inject
+    PlayerDestination(@NotNull ConcurrentPlayerWorldTracker playerWorldTracker) {
+        this.playerWorldTracker = playerWorldTracker;
     }
 
     /**
@@ -60,8 +65,8 @@ public final class PlayerDestination implements Destination<PlayerDestination, P
     @Override
     public @NotNull Collection<DestinationSuggestionPacket> suggestDestinations(
             @NotNull CommandSender sender, @Nullable String destinationParams) {
-        return Bukkit.getOnlinePlayers().stream()
-                .map(p -> new DestinationSuggestionPacket(this, p.getName(), p.getName()))
+        return playerWorldTracker.getOnlinePlayers().stream()
+                .map(player -> new DestinationSuggestionPacket(this, player, player))
                 .toList();
     }
 

src/main/java/org/mvplugins/multiverse/core/destination/core/PlayerDestinationInstance.java

@@ -9,6 +9,7 @@ import org.bukkit.util.Vector;
 import org.jetbrains.annotations.NotNull;
 
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
+import org.mvplugins.multiverse.core.locale.message.Message;
 
 import java.util.UUID;
 
@@ -66,6 +67,14 @@ public final class PlayerDestinationInstance extends DestinationInstance<PlayerD
         return Option.of(playerName);
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Message getDisplayMessage() {
+        return Message.of(playerName);
+    }
+
     /**
      * {@inheritDoc}
      */

src/main/java/org/mvplugins/multiverse/core/destination/core/WorldDestinationInstance.java

@@ -8,12 +8,9 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
-import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
+import org.mvplugins.multiverse.core.locale.message.Message;
 import org.mvplugins.multiverse.core.world.MultiverseWorld;
 
-import java.lang.ref.Reference;
-import java.lang.ref.WeakReference;
-
 /**
  * Destination instance implementation for the {@link WorldDestination}.
  */
@@ -87,6 +84,14 @@ public final class WorldDestinationInstance extends DestinationInstance<WorldDes
         return Option.of(world.getName());
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Message getDisplayMessage() {
+        return Message.of(world.getAliasOrName());
+    }
+
     /**
      * {@inheritDoc}
      */

src/main/java/org/mvplugins/multiverse/core/display/filters/RegexContentFilter.java

@@ -69,9 +69,12 @@ public class RegexContentFilter implements ContentFilter {
         if (!hasValidRegex()) {
             return false;
         }
-        String text = ChatTextFormatter.removeColor(String.valueOf(value)).toLowerCase();
+        String text = ChatTextFormatter.removeColor(String.valueOf(value));
+        if (text == null) {
+            return false;
+        }
         try {
-            return regexPattern.matcher(text).find();
+            return regexPattern.matcher(text.toLowerCase()).find();
         } catch (PatternSyntaxException ignored) {
             Logging.warning("Error parsing regex '%s' for input '%s'", regexString, text);
             return false;

src/main/java/org/mvplugins/multiverse/core/exceptions/utils/position/PositionParseException.java

@@ -0,0 +1,23 @@
+package org.mvplugins.multiverse.core.exceptions.utils.position;
+
+import org.jetbrains.annotations.Nullable;
+import org.mvplugins.multiverse.core.exceptions.MultiverseException;
+import org.mvplugins.multiverse.core.locale.message.Message;
+
+public class PositionParseException extends MultiverseException {
+    public PositionParseException(String message) {
+        super(message);
+    }
+
+    public PositionParseException(@Nullable Message message) {
+        super(message);
+    }
+
+    public PositionParseException(@Nullable String message, @Nullable Throwable cause) {
+        super(message, cause);
+    }
+
+    public PositionParseException(@Nullable Message message, @Nullable Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/org/mvplugins/multiverse/core/listeners/MVChatListener.java

@@ -16,6 +16,7 @@ import org.mvplugins.multiverse.core.dynamiclistener.annotations.IgnoreIfCancell
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.SkipIfEventExist;
 import org.mvplugins.multiverse.core.utils.text.ChatTextFormatter;
 import org.mvplugins.multiverse.core.world.WorldManager;
+import org.mvplugins.multiverse.core.world.helpers.ConcurrentPlayerWorldTracker;
 
 /**
  * Multiverse's Listener for players.
@@ -24,16 +25,17 @@ import org.mvplugins.multiverse.core.world.WorldManager;
 final class MVChatListener implements CoreListener {
     private final CoreConfig config;
     private final WorldManager worldManager;
-    private final MVPlayerListener playerListener;
+    private final ConcurrentPlayerWorldTracker playerWorldTracker;
 
     @Inject
     MVChatListener(
             CoreConfig config,
             WorldManager worldManager,
-            MVPlayerListener playerListener) {
+            ConcurrentPlayerWorldTracker playerWorldTracker
+    ) {
         this.config = config;
         this.worldManager = worldManager;
-        this.playerListener = playerListener;
+        this.playerWorldTracker = playerWorldTracker;
     }
 
     @EventClass("io.papermc.paper.event.player.AsyncChatEvent")
@@ -88,17 +90,15 @@ final class MVChatListener implements CoreListener {
         String prefixChatFormat = config.getPrefixChatFormat();
         prefixChatFormat = prefixChatFormat.replace("%world%", worldName).replace("%chat%", chat);
         prefixChatFormat = ChatTextFormatter.colorize(prefixChatFormat);
-
-        event.setFormat(prefixChatFormat);
+        if (prefixChatFormat != null) {
+            event.setFormat(prefixChatFormat);
+        }
     }
 
     private String getWorldName(Player player) {
-        String world = playerListener.getPlayerWorld().get(player.getName());
-        if (world == null) {
-            world = player.getWorld().getName();
-            playerListener.getPlayerWorld().put(player.getName(), world);
-        }
-        return this.worldManager.getLoadedWorld(world)
+        String worldName = playerWorldTracker.getPlayerWorld(player.getName())
+                .getOrElse(() -> player.getWorld().getName());
+        return this.worldManager.getLoadedWorld(worldName)
                 .map(mvworld -> mvworld.isHidden() ? "" : mvworld.getAliasOrName())
                 .getOrElse("");
     }

src/main/java/org/mvplugins/multiverse/core/listeners/MVEntityListener.java

@@ -11,7 +11,6 @@ import com.dumptruckman.minecraft.util.Logging;
 import jakarta.inject.Inject;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Player;
-import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.entity.CreatureSpawnEvent;
 import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;
@@ -43,7 +42,7 @@ final class MVEntityListener implements CoreListener {
      * @param event The Event that was fired.
      */
     @EventMethod
-    public void foodLevelChange(FoodLevelChangeEvent event) {
+    void foodLevelChange(FoodLevelChangeEvent event) {
         if (event.isCancelled()) {
             return;
         }
@@ -65,7 +64,7 @@ final class MVEntityListener implements CoreListener {
      * @param event The Event that was fired.
      */
     @EventMethod
-    public void entityRegainHealth(EntityRegainHealthEvent event) {
+    void entityRegainHealth(EntityRegainHealthEvent event) {
         if (event.isCancelled() || event.getRegainReason() != RegainReason.REGEN) {
             return;
         }
@@ -84,7 +83,7 @@ final class MVEntityListener implements CoreListener {
      * @param event The event.
      */
     @EventMethod
-    public void creatureSpawn(CreatureSpawnEvent event) {
+    void creatureSpawn(CreatureSpawnEvent event) {
         if (event.isCancelled()) {
             return;
         }
@@ -110,7 +109,7 @@ final class MVEntityListener implements CoreListener {
      * Handle Spawn Category settings for non-creature entities.
      */
     @EventMethod
-    public void entitySpawn(EntitySpawnEvent event) {
+    void entitySpawn(EntitySpawnEvent event) {
         if (event.getEntity() instanceof LivingEntity) {
             // Handled by CreatureSpawnEvent
             return;

src/main/java/org/mvplugins/multiverse/core/listeners/MVPlayerListener.java

@@ -7,9 +7,7 @@
 
 package org.mvplugins.multiverse.core.listeners;
 
-import java.util.Map;
 import java.util.Objects;
-import java.util.concurrent.ConcurrentHashMap;
 
 import com.dumptruckman.minecraft.util.Logging;
 import io.vavr.control.Option;
@@ -23,6 +21,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.event.player.PlayerPortalEvent;
 import org.bukkit.event.player.PlayerRespawnEvent;
 import org.bukkit.event.player.PlayerTeleportEvent;
@@ -32,15 +31,17 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.MultiverseCore;
 import org.mvplugins.multiverse.core.command.MVCommandManager;
 import org.mvplugins.multiverse.core.config.CoreConfig;
+import org.mvplugins.multiverse.core.destination.DestinationInstance;
 import org.mvplugins.multiverse.core.destination.DestinationsProvider;
-import org.mvplugins.multiverse.core.dynamiclistener.EventRunnable;
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.DefaultEventPriority;
-import org.mvplugins.multiverse.core.dynamiclistener.annotations.EventClass;
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.EventMethod;
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.EventPriorityKey;
+import org.mvplugins.multiverse.core.dynamiclistener.annotations.IgnoreIfCancelled;
 import org.mvplugins.multiverse.core.economy.MVEconomist;
 import org.mvplugins.multiverse.core.event.MVRespawnEvent;
 import org.mvplugins.multiverse.core.locale.PluginLocales;
+import org.mvplugins.multiverse.core.permissions.CorePermissionsChecker;
+import org.mvplugins.multiverse.core.teleportation.AsyncSafetyTeleporter;
 import org.mvplugins.multiverse.core.teleportation.BlockSafety;
 import org.mvplugins.multiverse.core.teleportation.TeleportQueue;
 import org.mvplugins.multiverse.core.utils.result.ResultChain;
@@ -51,7 +52,6 @@ import org.mvplugins.multiverse.core.world.entrycheck.EntryFeeResult;
 import org.mvplugins.multiverse.core.world.entrycheck.WorldEntryCheckerProvider;
 import org.mvplugins.multiverse.core.world.helpers.DimensionFinder;
 import org.mvplugins.multiverse.core.world.helpers.EnforcementHandler;
-import org.spigotmc.event.player.PlayerSpawnLocationEvent;
 
 /**
  * Multiverse's Listener for players.
@@ -70,8 +70,8 @@ final class MVPlayerListener implements CoreListener {
     private final DestinationsProvider destinationsProvider;
     private final EnforcementHandler enforcementHandler;
     private final DimensionFinder dimensionFinder;
-
-    private final Map<String, String> playerWorld = new ConcurrentHashMap<>();
+    private final CorePermissionsChecker corePermissionsChecker;
+    private final AsyncSafetyTeleporter asyncSafetyTeleporter;
 
     @Inject
     MVPlayerListener(
@@ -86,7 +86,9 @@ final class MVPlayerListener implements CoreListener {
             Provider<MVCommandManager> commandManagerProvider,
             DestinationsProvider destinationsProvider,
             EnforcementHandler enforcementHandler,
-            DimensionFinder dimensionFinder) {
+            DimensionFinder dimensionFinder,
+            CorePermissionsChecker corePermissionsChecker,
+            AsyncSafetyTeleporter asyncSafetyTeleporter) {
         this.plugin = plugin;
         this.config = config;
         this.worldManagerProvider = worldManagerProvider;
@@ -99,6 +101,8 @@ final class MVPlayerListener implements CoreListener {
         this.destinationsProvider = destinationsProvider;
         this.enforcementHandler = enforcementHandler;
         this.dimensionFinder = dimensionFinder;
+        this.corePermissionsChecker = corePermissionsChecker;
+        this.asyncSafetyTeleporter = asyncSafetyTeleporter;
     }
 
     private WorldManager getWorldManager() {
@@ -109,19 +113,10 @@ final class MVPlayerListener implements CoreListener {
         return commandManagerProvider.get();
     }
 
-    public PluginLocales getLocales() {
+    private PluginLocales getLocales() {
         return getCommandManager().getLocales();
     }
 
-    /**
-     * Gets the map of player and the world name they are in.
-     *
-     * @return the playerWorld-map
-     */
-    public Map<String, String> getPlayerWorld() {
-        return playerWorld;
-    }
-
     /**
      * This method is called when a player respawns.
      *
@@ -130,7 +125,7 @@ final class MVPlayerListener implements CoreListener {
     @EventMethod
     @EventPriorityKey("mvcore-player-respawn")
     @DefaultEventPriority(EventPriority.LOW)
-    public void playerRespawn(PlayerRespawnEvent event) {
+    void playerRespawn(PlayerRespawnEvent event) {
         Player player = event.getPlayer();
         LoadedMultiverseWorld mvWorld = getWorldManager().getLoadedWorld(player.getWorld()).getOrNull();
         if (mvWorld == null) {
@@ -197,64 +192,63 @@ final class MVPlayerListener implements CoreListener {
         return Option.of(mvWorld.getSpawnLocation());
     }
 
-    @EventClass("org.spigotmc.event.player.PlayerSpawnLocationEvent")
+    @EventMethod
+    // TODO: Consider if this key is needed anymore, need to remove from config.yml as well
     @EventPriorityKey("mvcore-player-spawn-location")
-    EventRunnable playerSpawnLocation() {
-        return new EventRunnable<PlayerSpawnLocationEvent>() {
-            @Override
-            public void onEvent(PlayerSpawnLocationEvent event) {
-                Player player = event.getPlayer();
-                MultiverseWorld world = getWorldManager().getLoadedWorld(player.getWorld()).getOrNull();
-                if (world == null) {
-                    Logging.finer("Player joined in a world that is not managed by Multiverse.");
-                    return;
-                }
-                if (!player.hasPlayedBefore()) {
-                    handleFirstSpawn(event);
-                } else {
-                    handleJoinLocation(event);
-                }
-                handleGameModeAndFlight(player, event.getSpawnLocation().getWorld());
-            }
+    void onPlayerJoin(PlayerJoinEvent event) {
+        Player player = event.getPlayer();
+        if (player.hasPlayedBefore()) {
+            handleJoinLocation(player);
+        } else {
+            handleFirstSpawn(player);
+        }
+        handleGameModeAndFlight(player, player.getWorld());
+    }
 
-            private void handleFirstSpawn(PlayerSpawnLocationEvent event) {
-                if (!config.getFirstSpawnOverride()) {
-                    Logging.finer("FirstSpawnOverride is disabled");
-                    // User has disabled the feature in config
-                    return;
-                }
-                Logging.fine("Moving NEW player to(firstspawnoverride): %s", config.getFirstSpawnLocation());
-                destinationsProvider.parseDestination(config.getFirstSpawnLocation())
-                        .map(destination -> destination.getLocation(event.getPlayer())
-                                .peek(event::setSpawnLocation)
-                                .onEmpty(() -> Logging.warning("The destination in FirstSpawnLocation in config is invalid")))
-                        .onFailure(failure -> {
-                            Logging.warning("Invalid destination in FirstSpawnLocation in config: %s");
-                            Logging.warning(failure.getFailureMessage().formatted(getLocales()));
-                        });
-            }
+    private void handleFirstSpawn(Player player) {
+        if (!config.getFirstSpawnOverride()) {
+            Logging.finer("FirstSpawnOverride is disabled");
+            // User has disabled the feature in config
+            return;
+        }
+        Logging.fine("Moving NEW player to(firstspawnoverride): %s", config.getFirstSpawnLocation());
+        destinationsProvider.parseDestination(config.getFirstSpawnLocation())
+                .peek(destination -> teleportToDestinationOnJoin(player, destination))
+                .onFailure(failure -> {
+                    Logging.warning("Invalid destination in FirstSpawnLocation in config: %s");
+                    Logging.warning(failure.getFailureMessage().formatted(getLocales()));
+                });
+    }
 
-            private void handleJoinLocation(PlayerSpawnLocationEvent event) {
-                if (!config.getEnableJoinDestination()) {
-                    Logging.finer("JoinDestination is disabled");
-                    // User has disabled the feature in config
-                    return;
-                }
-                if (config.getJoinDestination().isBlank()) {
-                    Logging.warning("Joindestination is enabled but no destination has been specified in config!");
-                    return;
-                }
-                Logging.finer("JoinDestination is " + config.getJoinDestination());
-                destinationsProvider.parseDestination(config.getJoinDestination())
-                        .map(destination -> destination.getLocation(event.getPlayer())
-                                .peek(event::setSpawnLocation)
-                                .onEmpty(() -> Logging.warning("The destination in JoinDestination in config is invalid")))
-                        .onFailure(failure -> {
-                            Logging.warning("Invalid destination in JoinDestination in config: %s");
-                            Logging.warning(failure.getFailureMessage().formatted(getLocales()));
-                        });
-            }
-        };
+    private void handleJoinLocation(Player player) {
+        if (!config.getEnableJoinDestination()) {
+            Logging.finer("JoinDestination is disabled");
+            // User has disabled the feature in config
+            return;
+        }
+        if (config.getJoinDestination().isBlank()) {
+            Logging.warning("Joindestination is enabled but no destination has been specified in config!");
+            return;
+        }
+        if (corePermissionsChecker.hasJoinLocationBypassPermission(player)) {
+            Logging.finer("Player %s has bypass permission for JoinDestination", player.getName());
+            return;
+        }
+        Logging.finer("JoinDestination is " + config.getJoinDestination());
+        destinationsProvider.parseDestination(config.getJoinDestination())
+                .peek(destination -> teleportToDestinationOnJoin(player, destination))
+                .onFailure(failure -> {
+                    Logging.warning("Invalid destination in JoinDestination in config: %s");
+                    Logging.warning(failure.getFailureMessage().formatted(getLocales()));
+                });
+    }
+
+    private void teleportToDestinationOnJoin(Player player, DestinationInstance<?, ?> destination) {
+        asyncSafetyTeleporter.to(destination).teleportSingle(player)
+                .onSuccess(result -> Logging.fine("Player %s has been teleported on join",
+                        player.getName()))
+                .onFailure(failure -> Logging.warning("Failed to teleport player %s on join: %s",
+                        player.getName(), failure.get(0)));
     }
 
     /**
@@ -262,11 +256,10 @@ final class MVPlayerListener implements CoreListener {
      * @param event The Event that was fired.
      */
     @EventMethod
-    @DefaultEventPriority(EventPriority.MONITOR)
-    public void playerChangedWorld(PlayerChangedWorldEvent event) {
-        // Permissions now determine whether or not to handle a gamemode.
+    @EventPriorityKey("mvcore-player-changed-world")
+    @DefaultEventPriority(EventPriority.NORMAL)
+    void playerChangedWorld(PlayerChangedWorldEvent event) {
         this.handleGameModeAndFlight(event.getPlayer(), event.getPlayer().getWorld());
-        playerWorld.put(event.getPlayer().getName(), event.getPlayer().getWorld().getName());
     }
 
     /**
@@ -276,13 +269,29 @@ final class MVPlayerListener implements CoreListener {
     @EventMethod
     @EventPriorityKey("mvcore-player-teleport")
     @DefaultEventPriority(EventPriority.HIGHEST)
-    public void playerTeleport(PlayerTeleportEvent event) {
-        Logging.finer("Got teleport event for player '"
-                + event.getPlayer().getName() + "' with cause '" + event.getCause() + "'");
+    void playerTeleport(PlayerTeleportEvent event) {
+        Player teleportee = event.getPlayer();
+
         if (event.isCancelled()) {
+            Logging.finer("Teleport event for player '" + teleportee.getName() + "' was already cancelled.");
             return;
         }
-        Player teleportee = event.getPlayer();
+
+        Logging.finer("Got teleport event for player '"
+                + teleportee.getName() + "' with cause '" + event.getCause() + "'");
+
+        Location fromLocation = event.getFrom();
+        if (fromLocation == null || fromLocation.getWorld() == null) { // should never be null, but just in case
+            Logging.finer("Teleport event for player '" + teleportee.getName() + "' has null from-location or world.");
+            return;
+        }
+
+        Location toLocation = event.getTo();
+        if (toLocation == null || toLocation.getWorld() == null) { // may be null on spigot
+            Logging.finer("Teleport event for player '" + teleportee.getName() + "' has null to-location or world.");
+            return;
+        }
+
         Option<String> teleporterName = teleportQueue.popFromQueue(teleportee.getName());
         CommandSender teleporter = teleporterName.map(name -> {
             if (name.equalsIgnoreCase("CONSOLE")) {
@@ -303,17 +312,17 @@ final class MVPlayerListener implements CoreListener {
         }
 
         Logging.finer("Teleporter %s is teleporting %s from %s to %s", teleporter.getName(), teleportee.getName(),
-                event.getFrom(), event.getTo());
+                fromLocation, toLocation);
 
-        MultiverseWorld fromWorld = getWorldManager().getLoadedWorld(event.getFrom().getWorld()).getOrNull();
-        LoadedMultiverseWorld toWorld = getWorldManager().getLoadedWorld(event.getTo().getWorld()).getOrNull();
+        MultiverseWorld fromWorld = getWorldManager().getLoadedWorld(fromLocation.getWorld()).getOrNull();
+        LoadedMultiverseWorld toWorld = getWorldManager().getLoadedWorld(toLocation.getWorld()).getOrNull();
         if (toWorld == null) {
             Logging.fine("Player '" + teleportee.getName() + "' is teleporting to world '"
-                    + event.getTo().getWorld().getName() + "' which is not managed by Multiverse-Core.  No further "
+                    + toLocation.getWorld().getName() + "' which is not managed by Multiverse-Core.  No further "
                     + "actions will be taken by Multiverse-Core.");
             return;
         }
-        if (event.getFrom().getWorld().equals(event.getTo().getWorld())) {
+        if (fromLocation.getWorld().equals(toLocation.getWorld())) {
             // The player is Teleporting to the same world.
             Logging.finer("Player '" + teleportee.getName() + "' is teleporting to the same world.");
             this.stateSuccess(teleportee.getName(), toWorld.getName());
@@ -347,20 +356,19 @@ final class MVPlayerListener implements CoreListener {
      */
     @EventMethod
     @DefaultEventPriority(EventPriority.LOWEST)
-    public void playerPortalCheck(PlayerPortalEvent event) {
-        if (event.isCancelled()) {
-            return;
-        }
-        if (event.getFrom().getWorld() == null) {
+    @IgnoreIfCancelled
+    void playerPortalCheck(PlayerPortalEvent event) {
+        Location fromLocation = event.getFrom();
+        if (fromLocation == null || fromLocation.getWorld() == null) {
             Logging.warning("PlayerPortalEvent's from world is null!");
             return;
         }
-        if (event.getFrom().getWorld().getBlockAt(event.getFrom()).getType() == Material.NETHER_PORTAL) {
+        if (fromLocation.getWorld().getBlockAt(fromLocation).getType() == Material.NETHER_PORTAL) {
             return;
         }
 
         // Player was actually outside of the portal, adjust the from location
-        Location newLocation = blockSafety.findPortalBlockNextTo(event.getFrom());
+        Location newLocation = blockSafety.findPortalBlockNextTo(fromLocation);
         if (newLocation != null) {
             event.setFrom(newLocation);
         }
@@ -373,28 +381,33 @@ final class MVPlayerListener implements CoreListener {
     @EventMethod
     @EventPriorityKey("mvcore-player-portal")
     @DefaultEventPriority(EventPriority.HIGH)
-    public void playerPortal(PlayerPortalEvent event) {
-        if (event.isCancelled()) {
+    @IgnoreIfCancelled
+    void playerPortal(PlayerPortalEvent event) {
+        Location fromLocation = event.getFrom();
+        if (fromLocation == null || fromLocation.getWorld() == null) { // should never be null, but just in case
+            Logging.finer("PlayerPortalEvent's from world is null!");
             return;
         }
-        if (event.getTo() == null || event.getTo().getWorld() == null) {
+
+        Location toLocation = event.getTo();
+        if (toLocation == null || toLocation.getWorld() == null) { // may be null on spigot
             Logging.finer("PlayerPortalEvent's to world is null!");
             return;
         }
         if (config.isUsingCustomPortalSearch()) {
             event.setSearchRadius(config.getCustomPortalSearchRadius());
         }
-        if (Objects.equals(event.getFrom().getWorld(), event.getTo().getWorld())) {
+        if (Objects.equals(fromLocation.getWorld(), toLocation.getWorld())) {
             // The player is Portaling to the same world.
             Logging.finer("Player '" + event.getPlayer().getName() + "' is portaling to the same world.");
             return;
         }
 
-        MultiverseWorld fromWorld = getWorldManager().getLoadedWorld(event.getFrom().getWorld()).getOrNull();
-        LoadedMultiverseWorld toWorld = getWorldManager().getLoadedWorld(event.getTo().getWorld()).getOrNull();
+        MultiverseWorld fromWorld = getWorldManager().getLoadedWorld(fromLocation.getWorld()).getOrNull();
+        LoadedMultiverseWorld toWorld = getWorldManager().getLoadedWorld(toLocation.getWorld()).getOrNull();
         if (toWorld == null) {
             Logging.fine("Player '" + event.getPlayer().getName() + "' is portaling to world '"
-                    + event.getTo().getWorld().getName() + "' which is not managed by Multiverse-Core.  No further "
+                    + toLocation.getWorld().getName() + "' which is not managed by Multiverse-Core.  No further "
                     + "actions will be taken by Multiverse-Core.");
             return;
         }
@@ -408,21 +421,31 @@ final class MVPlayerListener implements CoreListener {
     }
 
     /**
-     * Handles the gamemode for the specified {@link Player}.
+     * Handles the gamemode for the specified {@link Player}. Delays the enforcement if configured to do so
+     * to ensure multiverse has final say over other plugins changing gamemodes.
      *
      * @param player The {@link Player}.
      * @param world  The {@link World} the player is supposed to be in.
      */
     private void handleGameModeAndFlight(final Player player, World world) {
-        // We perform this task one tick later to MAKE SURE that the player actually reaches the
-        // destination world, otherwise we'd be changing the player mode if they havent moved anywhere.
-        this.server.getScheduler().runTaskLater(this.plugin, () -> {
-            if (!player.isOnline() || !player.getWorld().equals(world)) {
-                return;
-            }
-            Logging.finer("Handling gamemode and flight for player %s in world '%s'", player.getName(), world.getName());
-            enforcementHandler.handleFlightEnforcement(player);
-            enforcementHandler.handleGameModeEnforcement(player);
-        }, 1L);
+        if (config.getGamemodeAndFlightEnforceDelay() <= 0) {
+            doGameModeAndFlightEnforcement(player, world);
+            return;
+        }
+        server.getScheduler().runTaskLater(
+                this.plugin,
+                () -> doGameModeAndFlightEnforcement(player, world),
+                config.getGamemodeAndFlightEnforceDelay()
+        );
+    }
+
+    private void doGameModeAndFlightEnforcement(Player player, World world) {
+        if (!player.isOnline() || !player.getWorld().equals(world)) {
+            Logging.finer("Player %s is no longer online or not in the expected world '%s'", player.getName(), world.getName());
+            return;
+        }
+        Logging.finer("Handling gamemode and flight for player %s in world '%s'", player.getName(), world.getName());
+        enforcementHandler.handleFlightEnforcement(player);
+        enforcementHandler.handleGameModeEnforcement(player);
     }
 }

src/main/java/org/mvplugins/multiverse/core/listeners/MVPortalListener.java

@@ -12,7 +12,6 @@ import jakarta.inject.Inject;
 import org.bukkit.Material;
 import org.bukkit.PortalType;
 import org.bukkit.block.BlockState;
-import org.bukkit.event.EventHandler;
 import org.bukkit.event.block.Action;
 import org.bukkit.event.entity.EntityPortalEvent;
 import org.bukkit.event.player.PlayerInteractEvent;
@@ -48,7 +47,7 @@ final class MVPortalListener implements CoreListener {
      */
     @EventMethod
     @IgnoreIfCancelled
-    public void portalCreate(PortalCreateEvent event) {
+    void portalCreate(PortalCreateEvent event) {
         Logging.fine("Attempting to create portal at '%s' with reason: %s",
                 event.getWorld().getName(), event.getReason());
 
@@ -93,7 +92,7 @@ final class MVPortalListener implements CoreListener {
      */
     @EventMethod
     @IgnoreIfCancelled
-    public void playerInteract(PlayerInteractEvent event) {
+    void playerInteract(PlayerInteractEvent event) {
         if (isCreateEndPortalInteraction(event)) {
             return;
         }
@@ -122,7 +121,7 @@ final class MVPortalListener implements CoreListener {
      * @param event The Event that was fired.
      */
     @EventMethod
-    public void entityPortal(EntityPortalEvent event) {
+    void entityPortal(EntityPortalEvent event) {
         if (event.isCancelled() || event.getTo() == null) {
             return;
         }

src/main/java/org/mvplugins/multiverse/core/listeners/MVWeatherListener.java

@@ -9,7 +9,6 @@ package org.mvplugins.multiverse.core.listeners;
 
 import com.dumptruckman.minecraft.util.Logging;
 import jakarta.inject.Inject;
-import org.bukkit.event.EventHandler;
 import org.bukkit.event.weather.ThunderChangeEvent;
 import org.bukkit.event.weather.WeatherChangeEvent;
 import org.jvnet.hk2.annotations.Service;
@@ -35,7 +34,7 @@ final class MVWeatherListener implements CoreListener {
      * @param event The Event that was fired.
      */
     @EventMethod
-    public void weatherChange(WeatherChangeEvent event) {
+    void weatherChange(WeatherChangeEvent event) {
         if (event.isCancelled() || !event.toWeatherState()) {
             return;
         }
@@ -54,7 +53,7 @@ final class MVWeatherListener implements CoreListener {
      * @param event The Event that was fired.
      */
     @EventMethod
-    public void thunderChange(ThunderChangeEvent event) {
+    void thunderChange(ThunderChangeEvent event) {
         if (event.isCancelled() || !event.toThunderState()) {
             return;
         }

src/main/java/org/mvplugins/multiverse/core/listeners/MVWorldListener.java

@@ -18,6 +18,7 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.DefaultEventPriority;
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.EventMethod;
 import org.mvplugins.multiverse.core.world.WorldManager;
+import org.mvplugins.multiverse.core.world.options.LoadWorldOptions;
 import org.mvplugins.multiverse.core.world.options.UnloadWorldOptions;
 import org.mvplugins.multiverse.core.world.reasons.LoadFailureReason;
 import org.mvplugins.multiverse.core.world.reasons.UnloadFailureReason;
@@ -68,7 +69,7 @@ final class MVWorldListener implements CoreListener {
         worldManager.getUnloadedWorld(event.getWorld().getName())
                 .peek(world -> {
                     Logging.fine("Loading world: " + world.getName());
-                    worldManager.loadWorld(world).onFailure(failure -> {
+                    worldManager.loadWorld(LoadWorldOptions.world(world)).onFailure(failure -> {
                         if (failure.getFailureReason() != LoadFailureReason.WORLD_ALREADY_LOADING) {
                             Logging.severe("Failed to load world: " + failure);
                         }

src/main/java/org/mvplugins/multiverse/core/locale/MVCorei18n.java

@@ -308,11 +308,13 @@ public enum MVCorei18n implements MessageKeyProvider {
     IMPORTWORLD_WORLDEXISTUNLOADED,
     IMPORTWORLD_WORLDEXISTLOADED,
     IMPORTWORLD_WORLDFOLDERINVALID,
+    IMPORTWORLD_BUKKITENVIRONMENTMISMATCH,
 
     LOADWORLD_WORLDALREADYLOADING,
     LOADWORLD_WORLDNONEXISTENT,
     LOADWORLD_WORLDEXISTFOLDER,
     LOADWORLD_WORLDEXISTLOADED,
+    LOADWORLD_BUKKITENVIRONMENTMISMATCH,
 
     REMOVEWORLD_WORLDNONEXISTENT,
 
@@ -344,6 +346,11 @@ public enum MVCorei18n implements MessageKeyProvider {
     EXCEPTION_MULTIVERSEWORLD_UNLOADPLAYERSINWORLD,
     EXCEPTION_MULTIVERSEWORLD_UNLOADERROR,
 
+    // multiverse position parse exception
+    EXCEPTION_POSITIONPARSE_INVALIDDIRECTION,
+    EXCEPTION_POSITIONPARSE_INVALIDCOORDINATES,
+    EXCEPTION_POSITIONPARSE_INVALIDNUMBER,
+
     // generic
     GENERIC_SUCCESS,
     GENERIC_FAILURE,

src/main/java/org/mvplugins/multiverse/core/locale/message/LocalizedMessage.java

@@ -27,39 +27,12 @@ public final class LocalizedMessage extends Message implements MessageKeyProvide
         return messageKeyProvider.getMessageKey();
     }
 
-    @Override
-    public @NotNull String[] getReplacements(@NotNull Locales locales, @Nullable CommandIssuer commandIssuer) {
-        return toReplacementsArray(locales, commandIssuer, replacements);
-    }
-
-    @Override
-    public @NotNull String formatted(@NotNull CommandIssuer commandIssuer) {
-        return formatted(commandIssuer.getManager().getLocales(), commandIssuer);
-    }
-
     @Override
     public @NotNull String formatted(@NotNull Locales locales, @Nullable CommandIssuer commandIssuer) {
-        Objects.requireNonNull(locales, "locales must not be null");
-
         String[] parsedReplacements = getReplacements(locales, commandIssuer);
         if (parsedReplacements.length == 0) {
             return locales.getMessage(commandIssuer, getMessageKey());
         }
         return ACFUtil.replaceStrings(locales.getMessage(commandIssuer, getMessageKey()), parsedReplacements);
     }
-
-    private static String[] toReplacementsArray(
-            @NotNull Locales locales,
-            @Nullable CommandIssuer commandIssuer,
-            @NotNull MessageReplacement... replacements) {
-        String[] replacementsArray = new String[replacements.length * 2];
-        int i = 0;
-        for (MessageReplacement replacement : replacements) {
-            replacementsArray[i++] = replacement.getKey();
-            replacementsArray[i++] = replacement.getReplacement().fold(
-                    str -> str,
-                    message -> message.formatted(locales, commandIssuer));
-        }
-        return replacementsArray;
-    }
 }

src/main/java/org/mvplugins/multiverse/core/locale/message/Message.java

@@ -103,7 +103,7 @@ public sealed class Message permits LocalizedMessage {
      * @return The replacements
      */
     public @NotNull String[] getReplacements(@NotNull Locales locales, @Nullable CommandIssuer commandIssuer) {
-        return getReplacements();
+        return toReplacementsArray(locales, commandIssuer, replacements);
     }
 
     /**
@@ -152,7 +152,7 @@ public sealed class Message permits LocalizedMessage {
      * @return The formatted, localized message
      */
     public @NotNull String formatted(@NotNull CommandIssuer commandIssuer) {
-        return formatted();
+        return formatted(commandIssuer.getManager().getLocales(), commandIssuer);
     }
 
     /**
@@ -166,7 +166,11 @@ public sealed class Message permits LocalizedMessage {
      * @return The formatted, localized message
      */
     public @NotNull String formatted(@NotNull Locales locales, @Nullable CommandIssuer commandIssuer) {
-        return formatted();
+        String[] parsedReplacements = getReplacements(locales, commandIssuer);
+        if (parsedReplacements.length == 0) {
+            return raw();
+        }
+        return ACFUtil.replaceStrings(message, parsedReplacements);
     }
 
     private static String[] toReplacementsArray(@NotNull MessageReplacement... replacements) {
@@ -178,4 +182,19 @@ public sealed class Message permits LocalizedMessage {
         }
         return replacementsArray;
     }
+
+    private static String[] toReplacementsArray(
+            @NotNull Locales locales,
+            @Nullable CommandIssuer commandIssuer,
+            @NotNull MessageReplacement... replacements) {
+        String[] replacementsArray = new String[replacements.length * 2];
+        int i = 0;
+        for (MessageReplacement replacement : replacements) {
+            replacementsArray[i++] = replacement.getKey();
+            replacementsArray[i++] = replacement.getReplacement().fold(
+                    str -> str,
+                    message -> message.formatted(locales, commandIssuer));
+        }
+        return replacementsArray;
+    }
 }

src/main/java/org/mvplugins/multiverse/core/module/MultiverseModule.java

@@ -10,18 +10,16 @@ import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.ApiStatus;
 import org.jvnet.hk2.annotations.Contract;
 import org.mvplugins.multiverse.core.MultiverseCore;
-import org.mvplugins.multiverse.core.MultiverseCoreApi;
 import org.mvplugins.multiverse.core.command.MVCommandManager;
 import org.mvplugins.multiverse.core.command.MultiverseCommand;
-import org.mvplugins.multiverse.core.commands.CoreCommand;
 import org.mvplugins.multiverse.core.dynamiclistener.DynamicListener;
 import org.mvplugins.multiverse.core.dynamiclistener.DynamicListenerRegistration;
 import org.mvplugins.multiverse.core.inject.PluginServiceLocator;
 import org.mvplugins.multiverse.core.inject.PluginServiceLocatorFactory;
-import org.mvplugins.multiverse.core.inject.binder.PluginBinder;
-import org.mvplugins.multiverse.core.listeners.CoreListener;
 import org.mvplugins.multiverse.core.utils.REPatterns;
 
+import java.util.Locale;
+
 /**
  * Common plugin class for all Multiverse plugins.
  */
@@ -151,7 +149,7 @@ public abstract class MultiverseModule extends JavaPlugin {
                 .andThen(pluginLocales -> {
                     pluginLocales.addFileResClassLoader(this);
                     pluginLocales.addBundleClassLoader(this.getClassLoader());
-                    pluginLocales.addMessageBundles(this.getDescription().getName().toLowerCase());
+                    pluginLocales.addMessageBundles(this.getName().toLowerCase(Locale.ENGLISH));
                 })
                 .onFailure(e -> {
                     Logging.severe("Failed to register locales");

src/main/java/org/mvplugins/multiverse/core/permissions/CorePermissions.java

@@ -2,6 +2,7 @@ package org.mvplugins.multiverse.core.permissions;
 
 import com.dumptruckman.minecraft.util.Logging;
 import io.vavr.control.Try;
+import jakarta.annotation.PostConstruct;
 import jakarta.inject.Inject;
 import org.bukkit.permissions.Permission;
 import org.bukkit.permissions.PermissionDefault;
@@ -12,9 +13,15 @@ import org.mvplugins.multiverse.core.destination.Destination;
 import org.mvplugins.multiverse.core.world.MultiverseWorld;
 
 import static org.mvplugins.multiverse.core.permissions.PermissionUtils.concatPermission;
+import static org.mvplugins.multiverse.core.permissions.PermissionUtils.registerPermissionWithWildcards;
 
 @Service
 public final class CorePermissions {
+    /**
+     * Permission to bypass the join location.
+     */
+    static final String JOINLOCATION_BYPASS = "mv.bypass.joinlocation";
+
     /**
      * Permission to access a world.
      */
@@ -52,24 +59,36 @@ public final class CorePermissions {
         this.pluginManager = pluginManager;
     }
 
+    @PostConstruct
+    void registerBasePermissions() {
+        Try.run(() -> {
+            registerPermissionWithWildcards(new Permission(JOINLOCATION_BYPASS, PermissionDefault.FALSE));
+        }).onSuccess(ignore -> {
+            Logging.fine("Successfully registered base permissions");
+        }).onFailure(e -> {
+            Logging.fine("Failed to register base permissions: %s", e.getMessage());
+        });
+    }
+
     public Try<Void> addWorldPermissions(@NotNull MultiverseWorld world) {
         return Try.run(() -> {
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(WORLD_ACCESS, world.getName()), PermissionDefault.OP));
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(WORLD_EXEMPT, world.getName()), PermissionDefault.OP));
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(GAMEMODE_BYPASS, world.getName()), PermissionDefault.FALSE));
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(PLAYERLIMIT_BYPASS, world.getName()), PermissionDefault.FALSE));
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(SPAWN, world.getName()), PermissionDefault.OP));
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(SPAWN, "self", world.getName()), PermissionDefault.OP));
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(SPAWN, "other", world.getName()), PermissionDefault.OP));
             Logging.fine("Successfully registered permissions for world %s", world.getName());
-        });
+        }).onFailure(e -> Logging.fine("Failed to register permissions for world %s: %s",
+                world.getName(), e.getMessage()));
     }
 
     public Try<Void> removeWorldPermissions(@NotNull MultiverseWorld world) {
@@ -78,20 +97,23 @@ public final class CorePermissions {
             pluginManager.removePermission(concatPermission(WORLD_EXEMPT, world.getName()));
             pluginManager.removePermission(concatPermission(GAMEMODE_BYPASS, world.getName()));
             pluginManager.removePermission(concatPermission(PLAYERLIMIT_BYPASS, world.getName()));
+            pluginManager.removePermission(concatPermission(SPAWN, world.getName()));
             pluginManager.removePermission(concatPermission(SPAWN, "self", world.getName()));
             pluginManager.removePermission(concatPermission(SPAWN, "other", world.getName()));
             Logging.fine("Successfully removed permissions for world %s", world.getName());
-        });
+        }).onFailure(e -> Logging.fine("Failed to remove permissions for world %s: %s",
+                world.getName(), e.getMessage()));
     }
 
     public Try<Void> addDestinationPermissions(@NotNull Destination destination) {
         return Try.run(() -> {
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(TELEPORT, "self", destination.getIdentifier()), PermissionDefault.OP));
-            pluginManager.addPermission(new Permission(
+            registerPermissionWithWildcards(new Permission(
                     concatPermission(TELEPORT, "other", destination.getIdentifier()), PermissionDefault.OP));
             Logging.fine("Successfully registered permissions for destination %s", destination.getIdentifier());
-        });
+        }).onFailure(e -> Logging.fine("Failed to register permissions for destination %s: %s",
+                destination.getIdentifier(), e.getMessage()));
     }
 
     public Try<Void> removeDestinationPermissions(@NotNull Destination destination) {
@@ -99,6 +121,7 @@ public final class CorePermissions {
             pluginManager.removePermission(concatPermission(TELEPORT, "self", destination.getIdentifier()));
             pluginManager.removePermission(concatPermission(TELEPORT, "other", destination.getIdentifier()));
             Logging.fine("Successfully removed permissions for destination %s", destination.getIdentifier());
-        });
+        }).onFailure(e -> Logging.fine("Failed to remove permissions for destination %s: %s",
+                destination.getIdentifier(), e.getMessage()));
     }
 }

src/main/java/org/mvplugins/multiverse/core/permissions/CorePermissionsChecker.java

@@ -3,6 +3,7 @@ package org.mvplugins.multiverse.core.permissions;
 import jakarta.inject.Inject;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Entity;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jvnet.hk2.annotations.Service;
@@ -50,6 +51,19 @@ public final class CorePermissionsChecker {
         this.worldManager = worldManager;
     }
 
+    /**
+     * Checks if the sender has permission to bypass the join location restriction.
+     *
+     * @param sender The command sender.
+     * @return True if the sender has bypass permission, false otherwise.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public boolean hasJoinLocationBypassPermission(@NotNull CommandSender sender) {
+        return hasPermission(sender, CorePermissions.JOINLOCATION_BYPASS);
+    }
+
     /**
      * Checks if the sender has permission to access the specified world.
      *

src/main/java/org/mvplugins/multiverse/core/permissions/PermissionUtils.java

@@ -1,8 +1,14 @@
 package org.mvplugins.multiverse.core.permissions;
 
 import com.dumptruckman.minecraft.util.Logging;
+import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.ConsoleCommandSender;
+import org.bukkit.permissions.Permission;
+import org.bukkit.permissions.PermissionDefault;
+import org.jetbrains.annotations.ApiStatus;
+
+import java.util.Arrays;
 
 public final class PermissionUtils {
 
@@ -20,6 +26,37 @@ public final class PermissionUtils {
         PermissionUtils.debugPermissions = debugPermissions;
     }
 
+    /**
+     * Registers a permission along with all its wildcard parents.
+     * <br />
+     * For example, registering "mv.bypass.joinlocation" will also register "mv.*" and "mv.bypass.*" as parents.
+     *
+     * @param permission    The permission to register.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    public static void registerPermissionWithWildcards(Permission permission) {
+        Bukkit.getServer().getPluginManager().addPermission(permission);
+        String[] split = permission.getName().split("\\.");
+        StringBuilder prefix = new StringBuilder();
+        // Skip the last element since it's the actual permission
+        Arrays.stream(Arrays.copyOfRange(split, 0, split.length - 1)).forEach(s -> {
+            prefix.append(s).append(".");
+            Permission perm = getOrAddPermission(prefix + "*");
+            permission.addParent(perm, true);
+        });
+    }
+
+    private static Permission getOrAddPermission(String permission) {
+        Permission perm = Bukkit.getServer().getPluginManager().getPermission(permission);
+        if (perm == null) {
+            perm = new Permission(permission, PermissionDefault.FALSE);
+            Bukkit.getServer().getPluginManager().addPermission(perm);
+        }
+        return perm;
+    }
+
     /**
      * Joins permissions with a dot.
      *

src/main/java/org/mvplugins/multiverse/core/teleportation/BlockSafety.java

@@ -132,6 +132,10 @@ public final class BlockSafety {
      */
     public boolean canSpawnAtBlockSafely(@NotNull Block block) {
         Logging.finest("Checking spawn safety for location: %s, %s, %s", block.getX(), block.getY(), block.getZ());
+        if (!block.getWorld().getWorldBorder().isInside(block.getLocation())) {
+            Logging.finest("Location is outside world border.");
+            return false;
+        }
         if (isUnsafeSpawnBody(block)) {
             // Player body will be stuck in solid
             Logging.finest("Unsafe location for player's body: " + block);

src/main/java/org/mvplugins/multiverse/core/teleportation/LocationManipulation.java

@@ -228,8 +228,8 @@ public final class LocationManipulation {
         if (orientation == null) {
             return 0;
         }
-        if (ORIENTATION_INTS.containsKey(orientation.toLowerCase())) {
-            return ORIENTATION_INTS.get(orientation.toLowerCase());
+        if (ORIENTATION_INTS.containsKey(orientation.toLowerCase(Locale.ENGLISH))) {
+            return ORIENTATION_INTS.get(orientation.toLowerCase(Locale.ENGLISH));
         }
         return 0;
     }

src/main/java/org/mvplugins/multiverse/core/utils/CaseInsensitiveStringMap.java

@@ -0,0 +1,92 @@
+package org.mvplugins.multiverse.core.utils;
+
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NonNull;
+import org.jspecify.annotations.Nullable;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * A map with case-insensitive String keys. All keys are stored in lower-case form.
+ *
+ * @param <T> the type of mapped values
+ *
+ * @since 5.5
+ */
+@ApiStatus.AvailableSince("5.5")
+public class CaseInsensitiveStringMap<T> implements Map<String, T> {
+
+    private final Map<String, T> map;
+
+    public CaseInsensitiveStringMap() {
+        map = new HashMap<>();
+    }
+
+    @Override
+    public int size() {
+        return map.size();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return map.isEmpty();
+    }
+
+    @Override
+    public boolean containsKey(Object key) {
+        return map.containsKey(normalizeKey(key));
+    }
+
+    @Override
+    public boolean containsValue(Object value) {
+        return map.containsValue(value);
+    }
+
+    @Override
+    public T get(Object key) {
+        return map.get(normalizeKey(key));
+    }
+
+    @Override
+    public @Nullable T put(String key, T value) {
+        return map.put(normalizeKey(key), value);
+    }
+
+    @Override
+    public T remove(Object key) {
+        return map.remove(normalizeKey(key));
+    }
+
+    @Override
+    public void putAll(@NonNull Map<? extends String, ? extends T> m) {
+        m.forEach((key, value) -> map.put(normalizeKey(key), value));
+    }
+
+    @Override
+    public void clear() {
+        map.clear();
+    }
+
+    @Override
+    public @NonNull Set<String> keySet() {
+        return map.keySet();
+    }
+
+    @Override
+    public @NonNull Collection<T> values() {
+        return map.values();
+    }
+
+    @Override
+    public @NonNull Set<Entry<String, T>> entrySet() {
+        return map.entrySet();
+    }
+
+    private String normalizeKey(Object key) {
+        return String.valueOf(key).toLowerCase(Locale.ROOT);
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/FileUtils.java

@@ -77,7 +77,7 @@ public final class FileUtils {
      */
     public @Nullable File getServerProperties() {
         if (this.serverProperties == null) {
-            this.serverProperties = findFileFromServerDirectory("server.properties");
+            this.serverProperties = findFileFromServerDirectory(config.getServerPropertiesPath());
             Logging.finer("server.properties: %s", this.serverProperties);
         }
         return this.serverProperties;

src/main/java/org/mvplugins/multiverse/core/utils/PlayerFinder.java

@@ -1,16 +1,18 @@
 package org.mvplugins.multiverse.core.utils;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.UUID;
-import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
 import com.dumptruckman.minecraft.util.Logging;
 import com.google.common.base.Strings;
+import io.vavr.control.Try;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -76,22 +78,33 @@ public final class PlayerFinder {
     public static @NotNull List<Player> getMulti(@Nullable String playerIdentifiers,
                                                  @NotNull CommandSender sender
     ) {
-        List<Player> playerResults = new ArrayList<>();
+        return tryGetMulti(playerIdentifiers, sender)
+                .getOrElse(Collections.emptyList());
+    }
 
+    /**
+     * Get multiple {@link Player} based on many identifiers of name UUID or selector.
+     *
+     * @param playerIdentifiers An identifier of multiple names, UUIDs or selectors, separated by comma.
+     * @param sender            Target sender for selector.
+     * @return A list of all the {@link Player} found.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    public static @NotNull Try<@NotNull List<Player>> tryGetMulti(@Nullable String playerIdentifiers,
+                                                                   @NotNull CommandSender sender
+    ) {
         if (playerIdentifiers == null || Strings.isNullOrEmpty(playerIdentifiers)) {
-            return playerResults;
+            return Try.success(Collections.emptyList());
         }
 
         // TODO: Currently just assume entire string is a selector. Add support for comma seperated mixture of names, uuids and selectors
         if (isSelector(playerIdentifiers)) {
-            Logging.finer("Using selector: %s", playerIdentifiers);
-            List<Player> targetPlayers = getMultiBySelector(playerIdentifiers, sender);
-            if (targetPlayers != null) {
-                playerResults.addAll(targetPlayers);
-            }
-            return playerResults;
+            return tryGetMultiBySelector(playerIdentifiers, sender);
         }
 
+        List<Player> playerResults = new ArrayList<>();
         String[] playerIdentifierArray = REPatterns.COMMA.split(playerIdentifiers);
         for (String playerIdentifier : playerIdentifierArray) {
             Player targetPlayer = getByName(playerIdentifier);
@@ -104,15 +117,25 @@ public final class PlayerFinder {
                 playerResults.add(targetPlayer);
                 continue;
             }
-            List<Player> targetPlayers = getMultiBySelector(playerIdentifier, sender);
-            if (targetPlayers != null) {
-                playerResults.addAll(targetPlayers);
+            Try<@NotNull List<Player>> selectorParseResult = tryGetMultiBySelector(playerIdentifier, sender);
+            if  (selectorParseResult.isFailure()) {
+                return Try.failure(selectorParseResult.getCause());
             }
+            playerResults.addAll(selectorParseResult.getOrElse(Collections.emptyList()));
         }
-        return playerResults;
+        return Try.success(playerResults);
     }
 
-    private static boolean isSelector(@NotNull String playerIdentifier) {
+    /**
+     * Check if the player identifier is a selector.
+     *
+     * @param playerIdentifier  An identifier of name, UUID or selector.
+     * @return True if the identifier is a selector, else false.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    public static boolean isSelector(@NotNull String playerIdentifier) {
         return VANILLA_SELECTORS.stream().anyMatch(playerIdentifier::startsWith);
     }
 
@@ -167,7 +190,7 @@ public final class PlayerFinder {
                                                  @NotNull CommandSender sender
     ) {
         List<Player> matchedPlayers = getMultiBySelector(playerSelector, sender);
-        if (matchedPlayers == null || matchedPlayers.isEmpty()) {
+        if (matchedPlayers.isEmpty()) {
             Logging.fine("No player found with selector '%s' for %s.", playerSelector, sender.getName());
             return null;
         }
@@ -186,22 +209,36 @@ public final class PlayerFinder {
      * @param sender            Target sender for selector.
      * @return A list of all the {@link Player} found.
      */
-    public static @Nullable List<Player> getMultiBySelector(@NotNull String playerSelector,
+    public static @NotNull List<Player> getMultiBySelector(@NotNull String playerSelector,
                                                             @NotNull CommandSender sender
+    ) {
+        return tryGetMultiBySelector(playerSelector, sender)
+                .onFailure(throwable -> Logging.warning(
+                        "Error selecting entities with selector '%s' for %s: %s",
+                        playerSelector, sender.getName(), throwable.getMessage()
+                ))
+                .getOrElse(Collections::emptyList);
+    }
+
+    /**
+     * Get multiple {@link Player} based on <a href="https://minecraft.gamepedia.com/Commands#Target_selectors">vanilla selectors</a>.
+     *
+     * @param playerSelector    A target selector, usually starts with an '@'.
+     * @param sender            Target sender for selector.
+     * @return A list of all the {@link Player} found.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    public static @NotNull Try<@NotNull List<Player>> tryGetMultiBySelector(@NotNull String playerSelector,
+                                                                            @NotNull CommandSender sender
     ) {
         if (playerSelector.charAt(0) != '@') {
-            return null;
-        }
-        try {
-            return Bukkit.selectEntities(sender, playerSelector).stream()
-                    .filter(e -> e instanceof Player)
-                    .map(e -> ((Player) e))
-                    .collect(Collectors.toList());
-        } catch (IllegalArgumentException e) {
-            Logging.warning("An error occurred while parsing selector '%s' for %s. Is it is the correct format?",
-                    playerSelector, sender.getName());
-            e.printStackTrace();
-            return null;
+            return Try.success(Collections.emptyList());
         }
+        return Try.of(() -> Bukkit.selectEntities(sender, playerSelector).stream()
+                .filter(e -> e instanceof Player)
+                .map(e -> ((Player) e))
+                .collect(Collectors.toList()));
     }
 }

src/main/java/org/mvplugins/multiverse/core/utils/REPatterns.java

@@ -1,5 +1,7 @@
 package org.mvplugins.multiverse.core.utils;
 
+import org.jetbrains.annotations.ApiStatus;
+
 import java.util.HashMap;
 import java.util.Map;
 import java.util.regex.Pattern;
@@ -16,7 +18,17 @@ public class REPatterns {
     public static final Pattern COMMA = get(",");
     public static final Pattern DOT = get("\\.");
     public static final Pattern EQUALS = get("=");
+    @ApiStatus.AvailableSince("5.4")
+    public static final Pattern HYPHEN = get("-");
+    @ApiStatus.AvailableSince("5.4")
+    public static final Pattern NAMESPACE = get("^[a-z0-9_.-]+$");
+    @ApiStatus.AvailableSince("5.4")
+    public static final Pattern NAMESPACE_KEY = get("^[a-z0-9/_.-]+$");
     public static final Pattern SEMICOLON = get(";");
+    @ApiStatus.AvailableSince("5.4")
+    public static final Pattern SPACE = get(" ");
     public static final Pattern UNDERSCORE = get("_");
     public static final Pattern UUID = get("[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}");
+    @ApiStatus.AvailableSince("5.4")
+    public static final Pattern YAML_KEY = get("^[a-zA-Z0-9\\[\\]_-]+$");
 }

src/main/java/org/mvplugins/multiverse/core/utils/StringFormatter.java

@@ -2,13 +2,17 @@ package org.mvplugins.multiverse.core.utils;
 
 import com.google.common.base.Strings;
 import com.google.common.collect.Sets;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.Unmodifiable;
 
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 
@@ -30,15 +34,15 @@ public final class StringFormatter {
      * @param list the list of strings to join. If the list is empty, an empty string is returned.
      * @return the concatenated string
      */
-    public static @NotNull String joinAnd(List<String> list) {
+    public static @NotNull String joinAnd(@Nullable List<String> list) {
         return join(list, ", ", " and ");
     }
 
-    public static @NotNull String join(Collection list, String separator) {
+    public static @NotNull String join(@Nullable Collection<?> list, @NotNull String separator) {
         if (list == null || list.isEmpty()) {
             return "";
         }
-        return list.stream().map(String::valueOf).collect(Collectors.joining(separator)).toString();
+        return list.stream().map(String::valueOf).collect(Collectors.joining(separator));
     }
 
     /**
@@ -50,7 +54,7 @@ public final class StringFormatter {
      * @param lastSeparator the separator to use before the last element. For example, " and ".
      * @return the concatenated string
      */
-    public static @NotNull String join(List<String> list, String separator, String lastSeparator) {
+    public static @NotNull String join(@Nullable List<String> list, @NotNull String separator, @NotNull String lastSeparator) {
         if (list == null || list.isEmpty()) {
             return "";
         }
@@ -71,11 +75,30 @@ public final class StringFormatter {
 
     /**
      * Appends a list of suggestions to the end of the input string, separated by commas.
+     *
      * @param input     The current input
      * @param addons    The autocomplete suggestions
      * @return A collection of suggestions with the next suggestion appended
+     *
+     * @deprecated Method name has a spelling error. Use {@link #addOnToCommaSeparated(String, Collection)} instead.
      */
+    @Deprecated(forRemoval = true, since = "5.5")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     public static Collection<String> addonToCommaSeperated(@Nullable String input, @NotNull Collection<String> addons) {
+        return addOnToCommaSeparated(input, addons);
+    }
+
+    /**
+     * Appends a list of suggestions to the end of the input string, separated by commas.
+     *
+     * @param input     The current input
+     * @param addons    The autocomplete suggestions
+     * @return A collection of suggestions with the next suggestion appended
+     *
+     * @since 5.5
+     */
+    @ApiStatus.AvailableSince("5.5")
+    public static Collection<String> addOnToCommaSeparated(@Nullable String input, @NotNull Collection<String> addons) {
         if (Strings.isNullOrEmpty(input)) {
             return addons;
         }
@@ -94,7 +117,7 @@ public final class StringFormatter {
      * @param args  The args to parse
      * @return The parsed args
      */
-    public static Collection<String> parseQuotesInArgs(String[] args) {
+    public static @NotNull Collection<String> parseQuotesInArgs(@NotNull String[] args) {
         List<String> result = new ArrayList<>(args.length);
         StringBuilder current = new StringBuilder();
         boolean inQuotes = false;
@@ -139,7 +162,28 @@ public final class StringFormatter {
      * @param input The string to add quotes to
      * @return The quoted string
      */
-    public static String quoteMultiWordString(String input) {
-        return input.contains(" ") ? "\"" + input + "\"" : input;
+    @Contract("null -> null")
+    public static @Nullable String quoteMultiWordString(@Nullable String input) {
+        return input != null && input.contains(" ") ? "\"" + input + "\"" : input;
+    }
+
+    /**
+     * Parses a CSV string of key=value pairs into a map.
+     * E.g. "key1=value1,key2=value2" -> {key1=value1, key2=value2}
+     *
+     * @param input The CSV string to parse
+     * @return The parsed map
+     *
+     * @since 5.5
+     */
+    @ApiStatus.AvailableSince("5.5")
+    public static @Unmodifiable Map<String, String> parseCSVMap(@Nullable String input) {
+        if (Strings.isNullOrEmpty(input)) {
+            return Map.of();
+        }
+        return REPatterns.COMMA.splitAsStream(input)
+                .map(s -> REPatterns.EQUALS.split(s, 2))
+                .filter(parts -> parts.length == 2)
+                .collect(Collectors.toUnmodifiableMap(parts -> parts[0], parts -> parts[1]));
     }
 }

src/main/java/org/mvplugins/multiverse/core/utils/matcher/ExactStringMatcher.java

@@ -0,0 +1,75 @@
+package org.mvplugins.multiverse.core.utils.matcher;
+
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * ExactStringMatcher is a StringMatcher that matches strings against a set of exact values.
+ * It can be initialized with a single string, a collection of strings, or can have exact matches added later.
+ *
+ * @since 5.2
+ */
+@ApiStatus.AvailableSince("5.2")
+public class ExactStringMatcher implements StringMatcher {
+    private final Set<String> exactMatches;
+
+    /**
+     * Creates a new ExactStringMatcher with no initial matches. Use {@link #addExactMatch(String)} to add matches later.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public ExactStringMatcher() {
+        this.exactMatches = new HashSet<>();
+    }
+
+    /**
+     * Creates a new ExactStringMatcher with a single exact match.
+     *
+     * @param exactMatch the exact string to match against
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public ExactStringMatcher(@NotNull String exactMatch) {
+        this.exactMatches = new HashSet<>();
+        this.exactMatches.add(exactMatch);
+    }
+
+    /**
+     * Creates a new ExactStringMatcher with multiple exact matches.
+     *
+     * @param exactMatches the collection of exact strings to match against
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public ExactStringMatcher(@NotNull Collection<String> exactMatches) {
+        this.exactMatches = new HashSet<>(exactMatches);
+    }
+
+    /**
+     * Adds an exact match string to this matcher.
+     *
+     * @param value the exact string to add to the matcher
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public void addExactMatch(@NotNull String value) {
+        this.exactMatches.add(value);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean matches(@Nullable String value) {
+        return exactMatches.contains(value);
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/matcher/MatcherGroup.java

@@ -0,0 +1,107 @@
+package org.mvplugins.multiverse.core.utils.matcher;
+
+import com.dumptruckman.minecraft.util.Logging;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * MatcherGroup is a collection of StringMatchers that can match against a string.
+ * It works with all format supported by {@link StringMatcher#fromString(String)}.
+ *
+ * @since 5.2
+ */
+@ApiStatus.AvailableSince("5.2")
+public class MatcherGroup implements StringMatcher {
+
+    private final ExactStringMatcher exactMatcher;
+    private final List<StringMatcher> stringMatchers;
+
+    /**
+     * Creates a new empty MatcherGroup.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public MatcherGroup() {
+        this.exactMatcher = new ExactStringMatcher();
+        this.stringMatchers = new ArrayList<>();
+    }
+
+    /**
+     * Creates a new MatcherGroup with multiple strings to be parsed into matchers.
+     *
+     * @param matchStrings the collection of match strings
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public MatcherGroup(@NotNull Collection<String> matchStrings) {
+        this();
+        for (String matchString : matchStrings) {
+            addMatcher(matchString);
+        }
+    }
+
+    /**
+     * Creates a new MatcherGroup with a single exact match.
+     *
+     * @param matchString the single match string
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public void addMatcher(@Nullable String matchString) {
+        if (matchString == null || matchString.isEmpty()) {
+            return;
+        }
+        if (isExact(matchString)) {
+            exactMatcher.addExactMatch(matchString);
+        } else {
+            stringMatchers.add(StringMatcher.fromString(matchString));
+        }
+    }
+
+    private boolean isExact(@NotNull String matcherString) {
+        return !matcherString.contains("*") && !matcherString.startsWith("r=");
+    }
+
+    /**
+     * Adds an existing matcher to the group.
+     *
+     * @param matcher the StringMatcher to add
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public void addMatcher(@NotNull StringMatcher matcher) {
+        stringMatchers.add(matcher);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean matches(@Nullable String value) {
+        if (exactMatcher.matches(value)) {
+            return true;
+        }
+        for (StringMatcher matcher : stringMatchers) {
+            if (matcher.matches(value)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return "MatcherGroup{" + "exactMatcher=" + exactMatcher +
+                ", stringMatchers=" + stringMatchers +
+                '}';
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/matcher/RegexStringMatcher.java

@@ -0,0 +1,57 @@
+package org.mvplugins.multiverse.core.utils.matcher;
+
+import com.dumptruckman.minecraft.util.Logging;
+import io.vavr.control.Try;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.regex.Pattern;
+
+/**
+ * RegexStringMatcher is a StringMatcher that matches strings against a regex pattern.
+ * It can be initialized with a regex string, which can optionally start with 'r=' to indicate it's a regex.
+ *
+ * @since 5.2
+ */
+@ApiStatus.AvailableSince("5.2")
+public class RegexStringMatcher implements StringMatcher {
+    private final @NotNull String regexString;
+    private final @Nullable Pattern regexPattern;
+
+    /**
+     * Creates a new RegexStringMatcher with a regex string. 'r=' prefix will be stripped if present.
+     *
+     * @param regexString the regex string to match against. If it starts with 'r=', that part will be ignored.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public RegexStringMatcher(@NotNull String regexString) {
+        this.regexString = regexString;
+        this.regexPattern = compileRegex(regexString);
+    }
+
+    private Pattern compileRegex(String regexString) {
+        if (regexString.startsWith("r=")) {
+            regexString = regexString.substring(2);
+        }
+
+        String finalRegexString = regexString;
+        return Try.of(() -> Pattern.compile(finalRegexString))
+                .onFailure(ex -> Logging.warning("Failed to compile regex '%s': %s",
+                        finalRegexString, ex.getMessage()))
+                .getOrNull();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean matches(@Nullable String value) {
+        if (regexPattern == null || value == null) {
+            return false;
+        }
+        return regexPattern.matcher(value).matches();
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/matcher/StringMatcher.java

@@ -0,0 +1,67 @@
+package org.mvplugins.multiverse.core.utils.matcher;
+
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * StringMatcher is an interface for matching strings against various patterns.
+ * It currently built-in supports exact matches, wildcard matches, and regex matches.
+ * <br />
+ * Implement this interface to create your own custom string matchers.
+ *
+ * @since 5.2
+ */
+@ApiStatus.AvailableSince("5.2")
+public interface StringMatcher {
+
+    /**
+     * Creates a StringMatcher from a string representation. When the string starts with "r=", it is treated as a regex.
+     * If the string contains a '*', it is treated as a wildcard match.
+     *
+     * @param matcherString the string to be parsed into a matcher.
+     * @return a StringMatcher instance based on the provided string.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    static @NotNull StringMatcher fromString(@NotNull String matcherString) {
+        if (matcherString.startsWith("r=")) {
+            return new RegexStringMatcher(matcherString);
+        } else if (matcherString.contains("*")) {
+            return new WildcardStringMatcher(matcherString);
+        } else {
+            return new ExactStringMatcher(matcherString);
+        }
+    }
+
+    /**
+     * Checks if the given value matches the pattern defined by this StringMatcher.
+     *
+     * @param value the string to match against the pattern.
+     * @return true if the value matches, false otherwise.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    boolean matches(@Nullable String value);
+
+    /**
+     * Filters a list of strings, returning only those that match the pattern defined by this StringMatcher.
+     * This method is a convenience for applying the matcher to a collection of strings.
+     *
+     * @param values the list of strings to filter.
+     * @return A list of strings that match the pattern defined by this StringMatcher.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    default @NotNull List<String> filter(@NotNull List<String> values) {
+        return values.stream()
+                .filter(this::matches)
+                .collect(Collectors.toList());
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/matcher/WildcardStringMatcher.java

@@ -0,0 +1,50 @@
+package org.mvplugins.multiverse.core.utils.matcher;
+
+import com.dumptruckman.minecraft.util.Logging;
+import io.vavr.control.Try;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.regex.Pattern;
+
+/**
+ * WildcardStringMatcher is a StringMatcher that matches strings against a wildcard pattern.
+ * It supports '*' as a wildcard character, which can match any sequence of characters.
+ * <br />
+ * For example, the wildcard "foo*bar" will match any string that starts with "foo" and ends with "bar",
+ *
+ * @since 5.2
+ */
+@ApiStatus.AvailableSince("5.2")
+public class WildcardStringMatcher implements StringMatcher {
+
+    private final String wildcard;
+    private final Pattern pattern;
+
+    /**
+     * Creates a new WildcardStringMatcher with a wildcard string.
+     * The wildcard string can contain '*' characters, which will be replaced with a regex equivalent.
+     *
+     * @param wildcard the wildcard string to match against.
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public WildcardStringMatcher(@NotNull String wildcard) {
+        this.wildcard = wildcard;
+        this.pattern = Try.of(() -> Pattern.compile(("\\Q" + wildcard + "\\E").replace("*", "\\E.*\\Q")))
+                .onFailure(ex -> Logging.warning("Failed to compile wildcard '%s': %s",
+                        wildcard, ex.getMessage()))
+                .getOrNull();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean matches(@Nullable String value) {
+        if (pattern == null || value == null) {
+            return false;
+        }
+        return pattern.matcher(value).matches();
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/position/EntityPosition.java

@@ -0,0 +1,150 @@
+package org.mvplugins.multiverse.core.utils.position;
+
+import org.bukkit.Location;
+import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.exceptions.utils.position.PositionParseException;
+import org.mvplugins.multiverse.core.utils.REPatterns;
+
+/**
+ * Represents a position for an entity in 3D space, including both coordinates and facing direction.
+ *
+ * @since 5.3
+ */
+@ApiStatus.AvailableSince("5.3")
+public class EntityPosition {
+
+    /**
+     * Creates an EntityPosition with absolute coordinates and direction.
+     *
+     * @param x     The absolute X coordinate.
+     * @param y     The absolute Y coordinate.
+     * @param z     The absolute Z coordinate.
+     * @param pitch The absolute pitch (vertical angle).
+     * @param yaw   The absolute yaw (horizontal angle).
+     * @return A new EntityPosition instance with the specified absolute coordinates and direction.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static EntityPosition ofAbsolute(double x, double y, double z, double pitch, double yaw) {
+        return new EntityPosition(
+                VectorPosition.ofAbsolute(x, y, z),
+                FaceDirection.ofAbsolute(pitch, yaw)
+        );
+    }
+
+    /**
+     * Creates an EntityPosition from a Bukkit Location with absolute coordinates and direction.
+     *
+     * @param location The Bukkit Location to convert.
+     * @return A new EntityPosition instance representing the given location.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static EntityPosition ofLocation(Location location) {
+        return new EntityPosition(VectorPosition.ofLocation(location), FaceDirection.ofLocation(location));
+    }
+
+    /**
+     * Parses an EntityPosition from a string representation.
+     * The expected format is "<x>,<y>,<z>:<pitch>:<yaw>" for absolute coordinates and direction,
+     * or "<x>,<y>,<z>" for absolute coordinates with default direction (0 pitch, 0 yaw).
+     * <br>
+     * Relative coordinates and direction can be specified using the '~' prefix, e.g., "~10,~,~-10:0:90".
+     *
+     * @param positionStr The string representation of the position.
+     * @return A new EntityPosition instance parsed from the string.
+     * @throws PositionParseException If the string format is invalid.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static EntityPosition fromString(String positionStr) throws PositionParseException {
+        String[] parts = REPatterns.COLON.split(positionStr, 2);
+        return parts.length == 2
+                ? new EntityPosition(VectorPosition.fromString(parts[0]), FaceDirection.fromString(parts[1]))
+                : new EntityPosition(VectorPosition.fromString(parts[0]), FaceDirection.ofAbsolute(0, 0));
+    }
+
+    private final VectorPosition vector;
+    private final FaceDirection direction;
+
+    /**
+     * Creates a new EntityPosition with the specified vector and direction.
+     *
+     * @param vector    The vector position (coordinates).
+     * @param direction The facing direction (pitch and yaw).
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public EntityPosition(VectorPosition vector, FaceDirection direction) {
+        this.vector = vector;
+        this.direction = direction;
+    }
+
+    /**
+     * Gets the vector position (coordinates).
+     *
+     * @return The vector position.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public VectorPosition getVector() {
+        return vector;
+    }
+
+    /**
+     * Gets the facing direction (pitch and yaw).
+     *
+     * @return The facing direction.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public FaceDirection getDirection() {
+        return direction;
+    }
+
+    /**
+     * Augments a given Bukkit Location by applying the relative components of this EntityPosition.
+     * This modifies the provided Location in place.
+     *
+     * @param base The base Bukkit Location to augment and offset for relative positioning as required.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public void augmentBukkitLocation(Location base) {
+        vector.augmentBukkitLocation(base);
+        direction.augmentBukkitLocation(base);
+    }
+
+    /**
+     * Converts this EntityPosition to a new Bukkit Location based on a given base Location.
+     * This does not modify the base Location, but returns a new Location instance.
+     *
+     * @param base The base Bukkit Location to use as a reference for relative positioning as required.
+     * @return A new Bukkit Location representing this EntityPosition.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public Location toBukkitLocation(Location base) {
+        return new Location(
+                base.getWorld(),
+                vector.getX().getValue(base.getX()),
+                vector.getY().getValue(base.getY()),
+                vector.getZ().getValue(base.getZ()),
+                (float) direction.getYaw().getValue(base.getYaw()),
+                (float) direction.getPitch().getValue(base.getPitch())
+        );
+    }
+
+    @Override
+    public String toString() {
+        return vector + ":" + direction;
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/position/FaceDirection.java

@@ -0,0 +1,138 @@
+package org.mvplugins.multiverse.core.utils.position;
+
+import org.bukkit.Location;
+import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.exceptions.utils.position.PositionParseException;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.utils.REPatterns;
+
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
+/**
+ * Represents a direction to face, defined by pitch and yaw.
+ *
+ * @since 5.3
+ */
+@ApiStatus.AvailableSince("5.3")
+public class FaceDirection {
+
+    /**
+     * Creates a FaceDirection with absolute pitch and yaw.
+     *
+     * @param pitch The absolute pitch (vertical angle).
+     * @param yaw   The absolute yaw (horizontal angle).
+     * @return A new FaceDirection instance with the specified absolute pitch and yaw.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static FaceDirection ofAbsolute(double pitch, double yaw) {
+        return new FaceDirection(
+                PositionNumber.ofAbsolute(pitch),
+                PositionNumber.ofAbsolute(yaw)
+        );
+    }
+
+    /**
+     * Gets the pitch and yaw from a Bukkit Location to create an FaceDirection with absolute values.
+     *
+     * @param location The Bukkit Location to convert.
+     * @return A new FaceDirection instance representing the direction of the given location.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static FaceDirection ofLocation(org.bukkit.Location location) {
+        return new FaceDirection(
+                PositionNumber.ofAbsolute(location.getPitch()),
+                PositionNumber.ofAbsolute(location.getYaw())
+        );
+    }
+
+    /**
+     * Parses a FaceDirection from a string representation.
+     * The expected format is "<pitch>:<yaw>" for absolute pitch and yaw.
+     * <br>
+     * Relative pitch and yaw can be specified using the '~' prefix, e.g., "~:~5".
+     *
+     * @param directionStr The string representation of the direction.
+     * @return A new FaceDirection instance parsed from the string.
+     * @throws PositionParseException If the string format is invalid.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static FaceDirection fromString(String directionStr) throws PositionParseException {
+        String[] parts = REPatterns.COLON.split(directionStr, 2);
+        if (parts.length != 2) {
+            throw new PositionParseException(Message.of(MVCorei18n.EXCEPTION_POSITIONPARSE_INVALIDDIRECTION,
+                    replace("{format}").with(directionStr)));
+        }
+        //TODO: Add support for compass directions (N, S, E, W, NE, NW, SE, SW) for yaw
+        PositionNumber pitch = PositionNumber.fromString(parts[0]);
+        PositionNumber yaw = PositionNumber.fromString(parts[1]);
+        return new FaceDirection(pitch, yaw);
+    }
+
+    private final PositionNumber pitch;
+    private final PositionNumber yaw;
+
+    /**
+     * Creates a new FaceDirection with the specified pitch and yaw.
+     *
+     * @param pitch The pitch (vertical angle).
+     * @param yaw   The yaw (horizontal angle).
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public FaceDirection(PositionNumber pitch, PositionNumber yaw) {
+        this.pitch = pitch;
+        this.yaw = yaw;
+    }
+
+    /**
+     * Gets the pitch component of this FaceDirection.
+     *
+     * @return The pitch number representation.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public PositionNumber getPitch() {
+        return pitch;
+    }
+
+    /**
+     * Gets the yaw component of this FaceDirection.
+     *
+     * @return The yaw number representation.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public PositionNumber getYaw() {
+        return yaw;
+    }
+
+    /**
+     * Applies this FaceDirection to a given Bukkit Location, modifying its pitch and yaw.
+     * <br>
+     * Relative pitch and yaw will be offset based on the current values in the Location.
+     *
+     * @param base The Bukkit Location to modify.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public void augmentBukkitLocation(Location base) {
+        base.setPitch((float) pitch.getValue(base.getPitch()));
+        base.setYaw((float) yaw.getValue(base.getYaw()));
+    }
+
+    @Override
+    public String toString() {
+        return pitch + ":" + yaw;
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/position/PositionNumber.java

@@ -0,0 +1,187 @@
+package org.mvplugins.multiverse.core.utils.position;
+
+import io.vavr.control.Try;
+import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.exceptions.utils.position.PositionParseException;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
+
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
+/**
+ * Represents a number that can be either absolute or relative (prefixed with '~').
+ *
+ * @since 5.3
+ */
+@ApiStatus.AvailableSince("5.3")
+public sealed interface PositionNumber permits PositionNumber.Relative, PositionNumber.Absolute {
+
+    /**
+     * Creates an absolute PositionNumber. Absolute numbers represent fixed coordinates that will not be adjusted
+     * based on any base value.
+     *
+     * @param value the absolute value
+     * @return a PositionNumber representing the absolute value
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    static PositionNumber ofAbsolute(double value) {
+        return new Absolute(value);
+    }
+
+    /**
+     *  Creates a relative PositionNumber. Relative numbers are prefixed with '~' and represent an offset
+     *  from a base value. For example, a relative PositionNumber of '~5' means 5 units more than the base value,
+     *  while '~ -3' means 3 units less than the base value.
+     *
+     * @param value the relative offset value
+     * @return a PositionNumber representing the relative offset
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    static PositionNumber ofRelative(double value) {
+        return new Relative(value);
+    }
+
+    /**
+     * Parses a PositionNumber from a string. The string can represent either an absolute number (e.g., "10.5")
+     * or a relative number prefixed with '~' (e.g., "~5" or "~ -3"). If the string is "~" with no number,
+     * it is treated as a relative value of 0.
+     *
+     * @param string the string to parse
+     * @return a PositionNumber representing the parsed value.
+     * @throws PositionParseException If the string format is invalid.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    static PositionNumber fromString(String string) throws PositionParseException {
+        if (string.startsWith("~")) {
+            if (string.length() == 1) {
+                return new Relative(0);
+            }
+            return new Relative(tryParseDouble(string.substring(1)));
+        }
+        return new Absolute(tryParseDouble(string));
+    }
+
+    private static double tryParseDouble(String str) throws PositionParseException {
+        return Try.of(() -> Double.parseDouble(str))
+                .getOrElseThrow(throwable -> new PositionParseException(
+                        Message.of(MVCorei18n.EXCEPTION_POSITIONPARSE_INVALIDNUMBER,
+                                replace("{number}").with(str))));
+    }
+
+    /**
+     * Calculates the effective value based on the base value.
+     * For absolute PositionNumbers, this returns the stored value.
+     * For relative PositionNumbers, this returns base + stored value.
+     *
+     * @param base the base value to use for relative calculations
+     * @return the calculated effective value
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    double getValue(double base);
+
+    /**
+     * Checks if this PositionNumber is relative.
+     *
+     * @return true if this is a relative PositionNumber, false if absolute
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    boolean isRelative();
+
+    /**
+     * Checks if this PositionNumber is absolute.
+     *
+     * @return true if this is an absolute PositionNumber, false if relative
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    boolean isAbsolute();
+
+    /**
+     * Gets the raw stored value without any base adjustment.
+     *
+     * @return the raw value (for relative, this is the offset; for absolute, this is the fixed value)
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    double getRawValue();
+
+    final class Relative implements PositionNumber {
+
+        private final double value;
+
+        Relative(double value) {
+            this.value = value;
+        }
+
+        @Override
+        public double getValue(double base) {
+            return base + value;
+        }
+
+        @Override
+        public boolean isRelative() {
+            return true;
+        }
+
+        @Override
+        public boolean isAbsolute() {
+            return false;
+        }
+
+        @Override
+        public double getRawValue() {
+            return value;
+        }
+
+        @Override
+        public String toString() {
+            return "~" + value;
+        }
+    }
+
+     final class Absolute implements PositionNumber {
+
+        private final double value;
+
+        Absolute(double value) {
+        this.value = value;
+        }
+
+        @Override
+        public double getValue(double base) {
+        return value;
+        }
+
+        @Override
+        public boolean isRelative() {
+            return false;
+        }
+
+        @Override
+        public boolean isAbsolute() {
+            return true;
+        }
+
+        @Override
+        public double getRawValue() {
+        return value;
+        }
+
+        @Override
+        public String toString() {
+            return Double.toString(value);
+        }
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/position/VectorPosition.java

@@ -0,0 +1,227 @@
+package org.mvplugins.multiverse.core.utils.position;
+
+import org.bukkit.Location;
+import org.bukkit.util.Vector;
+import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.exceptions.utils.position.PositionParseException;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.utils.REPatterns;
+
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
+/**
+ * Represents an x, y, z position in 3D space, with support for absolute and relative coordinates.
+ *
+ * @since 5.3
+ */
+@ApiStatus.AvailableSince("5.3")
+public class VectorPosition {
+
+    /**
+     * Creates a VectorPosition with absolute coordinates.
+     * @param x The absolute x coordinate.
+     * @param y The absolute y coordinate.
+     * @param z The absolute z coordinate.
+     * @return A new VectorPosition instance with the specified absolute coordinates.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static VectorPosition ofAbsolute(double x, double y, double z) {
+        return new VectorPosition(
+                PositionNumber.ofAbsolute(x),
+                PositionNumber.ofAbsolute(y),
+                PositionNumber.ofAbsolute(z)
+        );
+    }
+
+    /**
+     * Creates a VectorPosition from a Bukkit Vector, using absolute coordinates.
+     *
+     * @param vector The Bukkit Vector to convert.
+     * @return A new VectorPosition instance representing the given vector.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static VectorPosition ofVector(Vector vector) {
+        return new VectorPosition(
+                PositionNumber.ofAbsolute(vector.getX()),
+                PositionNumber.ofAbsolute(vector.getY()),
+                PositionNumber.ofAbsolute(vector.getZ())
+        );
+    }
+
+    /**
+     * Creates a VectorPosition from a Bukkit Location, using absolute coordinates.
+     *
+     * @param location The Bukkit Location to convert.
+     * @return A new VectorPosition instance representing the given location.
+     *
+     * @since 5.3
+     */
+    public static VectorPosition ofLocation(Location location) {
+        return new VectorPosition(
+                PositionNumber.ofAbsolute(location.getX()),
+                PositionNumber.ofAbsolute(location.getY()),
+                PositionNumber.ofAbsolute(location.getZ())
+        );
+    }
+
+    /**
+     * Parses a VectorPosition from a string representation.
+     * The expected format is "<x>,<y>,<z>" for absolute or relative coordinates.
+     * <br>
+     * Relative coordinates can be specified using the '~' prefix, e.g., "~10,~,~-10".
+     *
+     * @param coordStr The string representation of the coordinates.
+     * @return A new VectorPosition instance parsed from the string.
+     * @throws PositionParseException If the string format is invalid.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public static VectorPosition fromString(String coordStr) throws PositionParseException {
+        String[] parts = REPatterns.COMMA.split(coordStr);
+        if (parts.length != 3) {
+            throw new PositionParseException(Message.of(MVCorei18n.EXCEPTION_POSITIONPARSE_INVALIDCOORDINATES,
+                    replace("{format}").with(coordStr)));
+        }
+        return new VectorPosition(
+                PositionNumber.fromString(parts[0]),
+                PositionNumber.fromString(parts[1]),
+                PositionNumber.fromString(parts[2])
+        );
+    }
+
+    private final PositionNumber x;
+    private final PositionNumber y;
+    private final PositionNumber z;
+
+    /**
+     * Creates a new VectorPosition with the specified PositionNumbers for x, y, and z.
+     *
+     * @param x The PositionNumber for the x coordinate.
+     * @param y The PositionNumber for the y coordinate.
+     * @param z The PositionNumber for the z coordinate.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public VectorPosition(PositionNumber x, PositionNumber y, PositionNumber z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    /**
+     * Gets the PositionNumber for the x coordinate.
+     *
+     * @return The PositionNumber representing the x coordinate.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public PositionNumber getX() {
+        return x;
+    }
+
+    /**
+     * Gets the PositionNumber for the y coordinate.
+     *
+     * @return The PositionNumber representing the y coordinate.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public PositionNumber getY() {
+        return y;
+    }
+
+    /**
+     * Gets the PositionNumber for the z coordinate.
+     *
+     * @return The PositionNumber representing the z coordinate.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public PositionNumber getZ() {
+        return z;
+    }
+
+    /**
+     * Augments the given Bukkit Vector in place by applying this VectorPosition's coordinates.
+     * Relative coordinates will adjust the existing values, while absolute coordinates will set them directly.
+     *
+     * @param base The Bukkit Vector to augment.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public void augmentBukkitVector(Vector base) {
+        base.setX(x.getValue(base.getX()));
+        base.setY(y.getValue(base.getY()));
+        base.setZ(z.getValue(base.getZ()));
+    }
+
+    /**
+     * Augments the given Bukkit Location in place by applying this VectorPosition's coordinates.
+     * Relative coordinates will adjust the existing values, while absolute coordinates will set them directly.
+     *
+     * @param location The Bukkit Location to augment.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public void augmentBukkitLocation(Location location) {
+        location.setX(x.getValue(location.getX()));
+        location.setY(y.getValue(location.getY()));
+        location.setZ(z.getValue(location.getZ()));
+    }
+
+    /**
+     * Converts this VectorPosition to a new Bukkit Vector based on a given base Vector.
+     * This does not modify the base Vector, but returns a new Vector instance.
+     *
+     * @param base The base Bukkit Vector to use as a reference for relative positioning as required.
+     * @return A new Bukkit Vector representing this VectorPosition.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public Vector toBukkitVector(Vector base) {
+        return new Vector(
+                x.getValue(base.getX()),
+                y.getValue(base.getY()),
+                z.getValue(base.getZ())
+        );
+    }
+
+    /**
+     * Converts this VectorPosition to a new Bukkit Location based on a given base Location.
+     * This does not modify the base Location, but returns a new Location instance.
+     *
+     * @param base The base Bukkit Location to use as a reference for relative positioning as required.
+     * @return A new Bukkit Location representing this VectorPosition.
+     *
+     * @since 5.3
+     */
+    @ApiStatus.AvailableSince("5.3")
+    public Location toBukkitLocation(Location base) {
+        return new Location(
+                base.getWorld(),
+                x.getValue(base.getX()),
+                y.getValue(base.getY()),
+                z.getValue(base.getZ()),
+                base.getYaw(),
+                base.getPitch()
+        );
+    }
+
+    @Override
+    public String toString() {
+        return x + "," + y + "," + z;
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/result/Attempt.java

@@ -107,18 +107,14 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      *
      * @return Whether this attempt is a success.
      */
-    default boolean isSuccess() {
-        return this instanceof Success;
-    }
+    boolean isSuccess();
 
     /**
      * Returns whether this attempt is a failure.
      *
      * @return Whether this attempt is a failure.
      */
-    default boolean isFailure() {
-        return this instanceof Failure;
-    }
+    boolean isFailure();
 
     /**
      * Converts this {@link Attempt} instance to an equivalent {@link Try} representation. Defaults to a
@@ -143,19 +139,25 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
     @ApiStatus.AvailableSince("5.1")
     Try<T> toTry(Function<Failure<T, F>, Throwable> throwableFunction);
 
+    /**
+     * Runs the given runnable after this attempt regardless of success or failure.
+     *
+     * @param runnable  The runnable.
+     * @return This attempt.
+     */
     default Attempt<T, F> thenRun(Runnable runnable) {
         runnable.run();
         return this;
     }
 
-    default Attempt<T, F> thenAccept(Consumer<Either<T, F>> consumer) {
-        if (this instanceof Success) {
-            consumer.accept(Either.left(get()));
-        } else {
-            consumer.accept(Either.right(getFailureReason()));
-        }
-        return this;
-    }
+    /**
+     * Accepts either the value or the failure reason depending on the result type.
+     * This will run regardless of success or failure.
+     *
+     * @param consumer The consumer with either the value or the failure reason.
+     * @return This attempt.
+     */
+    Attempt<T, F> thenAccept(Consumer<Either<T, F>> consumer);
 
     /**
      * Peeks at the value if this is a success attempt.
@@ -163,12 +165,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param consumer The consumer with the value.
      * @return This attempt.
      */
-    default Attempt<T, F> peek(Consumer<T> consumer) {
-        if (this instanceof Success) {
-            consumer.accept(get());
-        }
-        return this;
-    }
+     Attempt<T, F> peek(Consumer<T> consumer);
 
     /**
      * Maps the value to another value if this is a success attempt.
@@ -177,13 +174,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param <U>       The type of the new value.
      * @return The new attempt.
      */
-    default <U> Attempt<U, F> map(Function<? super T, ? extends U> mapper) {
-        if (this instanceof Success) {
-            return new Success<>(mapper.apply(get()));
-        } else {
-            return new Failure<>(getFailureReason(), getFailureMessage());
-        }
-    }
+    <U> Attempt<U, F> map(Function<? super T, ? extends U> mapper);
 
     /**
      * Maps the value to another attempt if this is a success attempt.
@@ -192,13 +183,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param <U>       The type of the new value.
      * @return The new attempt.
      */
-    default <U> Attempt<U, F> map(Supplier<? extends U> mapper) {
-        if (this instanceof Success) {
-            return new Success<>(mapper.get());
-        } else {
-            return new Failure<>(getFailureReason(), getFailureMessage());
-        }
-    }
+    <U> Attempt<U, F> map(Supplier<? extends U> mapper);
 
     /**
      * Maps the value to another attempt with the same fail reason if this is a success attempt.
@@ -207,13 +192,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param <U>       The type of the new value.
      * @return The new attempt.
      */
-    default <U> Attempt<U, F> mapAttempt(Function<? super T, Attempt<U, F>> mapper) {
-        if (this instanceof Success) {
-            return mapper.apply(get());
-        } else {
-            return new Failure<>(getFailureReason(), getFailureMessage());
-        }
-    }
+    <U> Attempt<U, F> mapAttempt(Function<? super T, Attempt<U, F>> mapper);
 
     /**
      * Maps the value to another attempt with the same fail reason if this is a success attempt.
@@ -222,13 +201,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param <U>       The type of the new value.
      * @return The new attempt.
      */
-    default <U> Attempt<U, F> mapAttempt(Supplier<Attempt<U, F>> mapper) {
-        if (this instanceof Success) {
-            return mapper.get();
-        } else {
-            return new Failure<>(getFailureReason(), getFailureMessage());
-        }
-    }
+    <U> Attempt<U, F> mapAttempt(Supplier<Attempt<U, F>> mapper);
 
     /**
      * Maps to another attempt with a different fail reason.
@@ -237,13 +210,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param <UF>          The type of the new fail reason.
      * @return The new attempt.
      */
-    default <UF extends FailureReason> Attempt<T, UF> transform(UF failureReason) {
-        if (this instanceof Success) {
-            return new Success<>(get());
-        } else {
-            return new Failure<>(failureReason, getFailureMessage());
-        }
-    }
+    <UF extends FailureReason> Attempt<T, UF> transform(UF failureReason);
 
     /**
      * Maps attempt result to another value.
@@ -256,13 +223,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @since 5.1
      */
     @ApiStatus.AvailableSince("5.1")
-    default <U> U transform(Function<T, U> successMapper, Function<F, U> failureMapper) {
-        if (this instanceof Success) {
-            return successMapper.apply(get());
-        } else {
-            return failureMapper.apply(getFailureReason());
-        }
-    }
+    <U> U transform(Function<T, U> successMapper, Function<F, U> failureMapper);
 
     /**
      * Calls either the failure or success function depending on the result type.
@@ -272,13 +233,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param <N>           The type of the new value.
      * @return The result of the function.
      */
-    default <N> N fold(Function<Failure<T, F>, N> failureMapper, Function<T, N> successMapper) {
-        if (this instanceof Success) {
-            return successMapper.apply(get());
-        } else {
-            return failureMapper.apply((Failure<T, F>) this);
-        }
-    }
+    <N> N fold(Function<Failure<T, F>, N> failureMapper, Function<T, N> successMapper);
 
     /**
      * Calls the given runnable if this is a success attempt.
@@ -286,12 +241,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param runnable  The runnable.
      * @return This attempt.
      */
-    default Attempt<T, F> onSuccess(Runnable runnable) {
-        if (this instanceof Success) {
-            runnable.run();
-        }
-        return this;
-    }
+    Attempt<T, F> onSuccess(Runnable runnable);
 
     /**
      * Calls the given consumer if this is a success attempt.
@@ -299,12 +249,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param consumer  The consumer with the value.
      * @return This attempt.
      */
-    default Attempt<T, F> onSuccess(Consumer<T> consumer) {
-        if (this instanceof Success) {
-            consumer.accept(get());
-        }
-        return this;
-    }
+    Attempt<T, F> onSuccess(Consumer<T> consumer);
 
     /**
      * Calls the given consumer if this is a failure attempt.
@@ -312,12 +257,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param runnable  The runnable.
      * @return This attempt.
      */
-    default Attempt<T, F> onFailure(Runnable runnable) {
-        if (this instanceof Failure) {
-            runnable.run();
-        }
-        return this;
-    }
+    Attempt<T, F> onFailure(Runnable runnable);
 
     /**
      * Calls the given consumer if this is a failure attempt.
@@ -325,12 +265,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param consumer  The consumer with the failure instance.
      * @return This attempt.
      */
-    default Attempt<T, F> onFailure(Consumer<Failure<T, F>> consumer) {
-        if (this instanceof Failure) {
-            consumer.accept((Failure<T, F>) this);
-        }
-        return this;
-    }
+    Attempt<T, F> onFailure(Consumer<Failure<T, F>> consumer);
 
     /**
      * Calls the given runnable if this is a failure attempt.
@@ -338,12 +273,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @param consumer  The consumer with the failure reason.
      * @return This attempt.
      */
-    default Attempt<T, F> onFailureReason(Consumer<F> consumer) {
-        if (this instanceof Failure) {
-            consumer.accept(getFailureReason());
-        }
-        return this;
-    }
+    Attempt<T, F> onFailureReason(Consumer<F> consumer);
 
     /**
      * Represents a successful attempt with a value.
@@ -378,6 +308,26 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
             return value;
         }
 
+        @Override
+        public F getFailureReason() {
+            throw new UnsupportedOperationException("No failure reason as attempt is a success");
+        }
+
+        @Override
+        public Message getFailureMessage() {
+            throw new UnsupportedOperationException("No failure message as attempt is a success");
+        }
+
+        @Override
+        public boolean isSuccess() {
+            return true;
+        }
+
+        @Override
+        public boolean isFailure() {
+            return false;
+        }
+
         @Override
         public Try<T> toTry() {
             return Try.success(value);
@@ -389,13 +339,83 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
         }
 
         @Override
-        public F getFailureReason() {
-            throw new UnsupportedOperationException("No failure reason as attempt is a success");
+        public Attempt<T, F> thenAccept(Consumer<Either<T, F>> consumer) {
+            consumer.accept(Either.left(value));
+            return this;
         }
 
         @Override
-        public Message getFailureMessage() {
-            throw new UnsupportedOperationException("No failure message as attempt is a success");
+        public Attempt<T, F> peek(Consumer<T> consumer) {
+            consumer.accept(value);
+            return this;
+        }
+
+        @Override
+        public <U> Attempt<U, F> map(Function<? super T, ? extends U> mapper) {
+            return new Success<>(mapper.apply(value));
+        }
+
+        @Override
+        public <U> Attempt<U, F> map(Supplier<? extends U> mapper) {
+            return new Success<>(mapper.get());
+        }
+
+        @Override
+        public <U> Attempt<U, F> mapAttempt(Function<? super T, Attempt<U, F>> mapper) {
+            return mapper.apply(value);
+        }
+
+        @Override
+        public <U> Attempt<U, F> mapAttempt(Supplier<Attempt<U, F>> mapper) {
+            return mapper.get();
+        }
+
+        @Override
+        public <UF extends FailureReason> Attempt<T, UF> transform(UF failureReason) {
+            return changeFailureType();
+        }
+
+        @Override
+        public <U> U transform(Function<T, U> successMapper, Function<F, U> failureMapper) {
+            return successMapper.apply(value);
+        }
+
+        @Override
+        public <N> N fold(Function<Failure<T, F>, N> failureMapper, Function<T, N> successMapper) {
+            return successMapper.apply(value);
+        }
+
+        @Override
+        public Attempt<T, F> onSuccess(Runnable runnable) {
+            runnable.run();
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> onSuccess(Consumer<T> consumer) {
+            consumer.accept(value);
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> onFailure(Runnable runnable) {
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> onFailure(Consumer<Failure<T, F>> consumer) {
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> onFailureReason(Consumer<F> consumer) {
+            return this;
+        }
+
+        private <UF extends FailureReason> Attempt<T, UF> changeFailureType() {
+            @SuppressWarnings("unchecked")
+            Attempt<T, UF> mappedSuccess = (Attempt<T, UF>) this;
+            return mappedSuccess;
         }
 
         @Override
@@ -415,10 +435,20 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
     final class Failure<T, F extends FailureReason> implements Attempt<T, F> {
         private final F failureReason;
         private final Message message;
+        private final Failure<?, ?> causeBy;
 
         Failure(F failureReason, Message message) {
+            this(failureReason, message, null);
+        }
+
+        Failure(Failure<?, F> failure) {
+            this(failure.failureReason, failure.message, failure.causeBy);
+        }
+
+        Failure(F failureReason, Message message, Failure<?, ?> causeBy) {
             this.failureReason = failureReason;
             this.message = message;
+            this.causeBy = causeBy;
         }
 
         @Override
@@ -441,16 +471,6 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
             throw exceptionSupplier.apply(this);
         }
 
-        @Override
-        public Try<T> toTry() {
-            return Try.failure(new MultiverseException(message));
-        }
-
-        @Override
-        public Try<T> toTry(Function<Failure<T, F>, Throwable> throwableFunction) {
-            return Try.failure(throwableFunction.apply(this));
-        }
-
         @Override
         public F getFailureReason() {
             return failureReason;
@@ -461,10 +481,111 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
             return message;
         }
 
+        @Override
+        public boolean isSuccess() {
+            return false;
+        }
+
+        @Override
+        public boolean isFailure() {
+            return true;
+        }
+
+        @Override
+        public Try<T> toTry() {
+            return Try.failure(new MultiverseException(message));
+        }
+
+        @Override
+        public Try<T> toTry(Function<Failure<T, F>, Throwable> throwableFunction) {
+            return Try.failure(throwableFunction.apply(this));
+        }
+
+        @Override
+        public Attempt<T, F> thenAccept(Consumer<Either<T, F>> consumer) {
+            consumer.accept(Either.right(failureReason));
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> peek(Consumer<T> consumer) {
+            return this;
+        }
+
+        @Override
+        public <U> Attempt<U, F> map(Function<? super T, ? extends U> mapper) {
+            return changeValueType();
+        }
+
+        @Override
+        public <U> Attempt<U, F> map(Supplier<? extends U> mapper) {
+            return changeValueType();
+        }
+
+        @Override
+        public <U> Attempt<U, F> mapAttempt(Function<? super T, Attempt<U, F>> mapper) {
+            return changeValueType();
+        }
+
+        @Override
+        public <U> Attempt<U, F> mapAttempt(Supplier<Attempt<U, F>> mapper) {
+            return changeValueType();
+        }
+
+        @Override
+        public <UF extends FailureReason> Attempt<T, UF> transform(UF failureReason) {
+            return new Failure<>(failureReason, getFailureMessage(), this);
+        }
+
+        @Override
+        public <U> U transform(Function<T, U> successMapper, Function<F, U> failureMapper) {
+            return failureMapper.apply(failureReason);
+        }
+
+        @Override
+        public <N> N fold(Function<Failure<T, F>, N> failureMapper, Function<T, N> successMapper) {
+            return failureMapper.apply(this);
+        }
+
+        @Override
+        public Attempt<T, F> onSuccess(Runnable runnable) {
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> onSuccess(Consumer<T> consumer) {
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> onFailure(Runnable runnable) {
+            runnable.run();
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> onFailure(Consumer<Failure<T, F>> consumer) {
+            consumer.accept(this);
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> onFailureReason(Consumer<F> consumer) {
+            consumer.accept(failureReason);
+            return this;
+        }
+
+        private <U> Attempt<U, F> changeValueType() {
+            @SuppressWarnings("unchecked")
+            Attempt<U, F> mappedFailure = (Attempt<U, F>) this;
+            return mappedFailure;
+        }
+
         @Override
         public String toString() {
             return "Failure{"
                     + "reason=" + failureReason
+                    + (causeBy != null ? ", causeBy=" + causeBy : "")
                     + '}';
         }
     }

src/main/java/org/mvplugins/multiverse/core/utils/result/FailureReason.java

@@ -3,12 +3,21 @@ package org.mvplugins.multiverse.core.utils.result;
 import co.aikar.locales.MessageKey;
 import co.aikar.locales.MessageKeyProvider;
 
+import org.jetbrains.annotations.ApiStatus;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 
 /**
  * Represents a failure reason for an {@link Attempt}.
  */
 public interface FailureReason extends MessageKeyProvider {
+    /**
+     * A generic failure reason that can be used when no specific reason is applicable.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    FailureReason GENERIC = new FailureReason() { };
+
     default MessageKey getMessageKey() {
         return MVCorei18n.GENERIC_FAILURE.getMessageKey();
     }

src/main/java/org/mvplugins/multiverse/core/utils/result/SuccessReason.java

@@ -3,9 +3,21 @@ package org.mvplugins.multiverse.core.utils.result;
 import co.aikar.locales.MessageKey;
 import co.aikar.locales.MessageKeyProvider;
 
+import org.jetbrains.annotations.ApiStatus;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 
+/**
+ * Represents a success reason for an {@link Attempt}.
+ */
 public interface SuccessReason extends MessageKeyProvider {
+    /**
+     * A generic success reason that can be used when no specific reason is applicable.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    SuccessReason GENERIC = new SuccessReason() { };
+
     default MessageKey getMessageKey() {
         return MVCorei18n.GENERIC_SUCCESS.getMessageKey();
     }

src/main/java/org/mvplugins/multiverse/core/utils/text/AdventureTextFormatter.java

@@ -4,37 +4,45 @@ import net.kyori.adventure.text.TextComponent;
 import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
 import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 final class AdventureTextFormatter implements TextFormatter {
     @Override
-    public void sendFormattedMessage(CommandSender sender, String message) {
-        sender.sendMessage(colorize(message));
+    public void sendFormattedMessage(@NotNull CommandSender sender, @Nullable String message) {
+        String colorizedMessage = colorize(message);
+        if (colorizedMessage == null) {
+            return; // Avoid sending null messages
+        }
+        sender.sendMessage(colorizedMessage);
     }
 
     @Override
-    public String removeColor(String message) {
-        TextComponent sectionComponent = LegacyComponentSerializer.legacySection().deserialize(colorize(message));
-        return PlainTextComponentSerializer.plainText().serialize(sectionComponent);
-    }
-
-    public String removeAmpColor(String message) {
-        return PlainTextComponentSerializer.plainText().serialize(toAmpComponent(message));
-    }
-
-    public String removeSectionColor(String message) {
-        return PlainTextComponentSerializer.plainText().serialize(toSectionComponent(message));
+    public @Nullable String removeColor(@Nullable String message) {
+        TextComponent sectionComponent = LegacyComponentSerializer.legacySection().deserializeOrNull(colorize(message));
+        return PlainTextComponentSerializer.plainText().serializeOrNull(sectionComponent);
     }
 
     @Override
-    public String colorize(String message) {
-        return LegacyComponentSerializer.legacySection().serialize(toAmpComponent(message));
+    public @Nullable String removeAmpColor(@Nullable String message) {
+        return PlainTextComponentSerializer.plainText().serializeOrNull(toAmpComponent(message));
     }
 
-    private TextComponent toAmpComponent(String message) {
-        return LegacyComponentSerializer.legacyAmpersand().deserialize(message);
+    @Override
+    public @Nullable String removeSectionColor(@Nullable String message) {
+        return PlainTextComponentSerializer.plainText().serializeOrNull(toSectionComponent(message));
     }
 
-    private TextComponent toSectionComponent(String message) {
-        return LegacyComponentSerializer.legacySection().deserialize(message);
+    @Override
+    public @Nullable String colorize(@Nullable String message) {
+        return LegacyComponentSerializer.legacySection().serializeOrNull(toAmpComponent(message));
+    }
+
+    private @Nullable TextComponent toAmpComponent(@Nullable String message) {
+        return LegacyComponentSerializer.legacyAmpersand().deserializeOrNull(message);
+    }
+
+    private @Nullable TextComponent toSectionComponent(@Nullable String message) {
+        return LegacyComponentSerializer.legacySection().deserializeOrNull(message);
     }
 }

src/main/java/org/mvplugins/multiverse/core/utils/text/ChatColorTextFormatter.java

@@ -2,30 +2,36 @@ package org.mvplugins.multiverse.core.utils.text;
 
 import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
+@SuppressWarnings("deprecation")
 final class ChatColorTextFormatter implements TextFormatter {
     @Override
-    public void sendFormattedMessage(CommandSender sender, String message) {
+    public void sendFormattedMessage(@NotNull CommandSender sender, String message) {
         sender.sendMessage(colorize(message));
     }
 
     @Override
-    public String removeColor(String message) {
+    public @Nullable String removeColor(@Nullable String message) {
         return ChatColor.stripColor(colorize(message));
     }
 
     @Override
-    public String removeAmpColor(String message) {
+    public @Nullable String removeAmpColor(@Nullable String message) {
         return removeColor(message);
     }
 
     @Override
-    public String removeSectionColor(String message) {
+    public @Nullable String removeSectionColor(@Nullable String message) {
         return ChatColor.stripColor(message);
     }
 
     @Override
-    public String colorize(String message) {
+    public @Nullable String colorize(@Nullable String message) {
+        if (message == null) {
+            return null;
+        }
         return ChatColor.translateAlternateColorCodes('&', message);
     }
 }

src/main/java/org/mvplugins/multiverse/core/utils/text/ChatTextFormatter.java

@@ -2,6 +2,8 @@ package org.mvplugins.multiverse.core.utils.text;
 
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.mvplugins.multiverse.core.utils.ReflectHelper;
 
 /**
@@ -16,7 +18,8 @@ public final class ChatTextFormatter {
     private static final TextFormatter wrapper;
 
     static {
-        if (ReflectHelper.hasClass("net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer")) {
+        if (ReflectHelper.hasClass("net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer")
+         && ReflectHelper.hasClass("net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer")) {
             wrapper = new AdventureTextFormatter();
         } else {
             wrapper = new ChatColorTextFormatter();
@@ -32,7 +35,7 @@ public final class ChatTextFormatter {
      * @since 5.1
      */
     @ApiStatus.AvailableSince("5.1")
-    public static void sendFormattedMessage(CommandSender sender, String message) {
+    public static void sendFormattedMessage(@NotNull CommandSender sender, @Nullable String message) {
         wrapper.sendFormattedMessage(sender, message);
     }
 
@@ -44,7 +47,7 @@ public final class ChatTextFormatter {
      *
      * @since 5.1
      */
-    public static String removeColor(String message) {
+    public static @Nullable String removeColor(@Nullable String message) {
         return wrapper.removeColor(message);
     }
 
@@ -57,7 +60,7 @@ public final class ChatTextFormatter {
      * @since 5.1
      */
     @ApiStatus.AvailableSince("5.1")
-    public static String removeAmpColor(String message) {
+    public static @Nullable String removeAmpColor(@Nullable String message) {
         return wrapper.removeAmpColor(message);
     }
 
@@ -70,7 +73,7 @@ public final class ChatTextFormatter {
      * @since 5.1
      */
     @ApiStatus.AvailableSince("5.1")
-    public static String removeSectionColor(String message) {
+    public static @Nullable String removeSectionColor(@Nullable String message) {
         return wrapper.removeSectionColor(message);
     }
 
@@ -83,7 +86,7 @@ public final class ChatTextFormatter {
      * @since 5.1
      */
     @ApiStatus.AvailableSince("5.1")
-    public static String colorize(String message) {
+    public static @Nullable String colorize(@Nullable String message) {
         return wrapper.colorize(message);
     }
 }

src/main/java/org/mvplugins/multiverse/core/utils/text/TextFormatter.java

@@ -1,15 +1,17 @@
 package org.mvplugins.multiverse.core.utils.text;
 
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 interface TextFormatter {
-    void sendFormattedMessage(CommandSender sender, String message);
+    void sendFormattedMessage(@NotNull CommandSender sender, @Nullable String message);
 
-    String removeColor(String message);
+    @Nullable String removeColor(@Nullable String message);
 
-    String removeAmpColor(String message);
+    @Nullable String removeAmpColor(@Nullable String message);
 
-    String removeSectionColor(String message);
+    @Nullable String removeSectionColor(@Nullable String message);
 
-    String colorize(String message);
+    @Nullable String colorize(@Nullable String message);
 }

src/main/java/org/mvplugins/multiverse/core/world/MultiverseWorld.java

@@ -3,6 +3,7 @@ package org.mvplugins.multiverse.core.world;
 import java.util.List;
 
 import com.google.common.base.Strings;
+import io.vavr.control.Option;
 import io.vavr.control.Try;
 import org.bukkit.Bukkit;
 import org.bukkit.Difficulty;
@@ -10,6 +11,7 @@ import org.bukkit.GameMode;
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.World;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -66,7 +68,8 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
     }
 
     /**
-     * Gets whether this world is loaded.
+     * Gets whether this world is loaded. Note that this may return false even if this is a stored instance of
+     * {@link LoadedMultiverseWorld} as worlds can be unloaded anytime.
      *
      * @return True if the world is loaded, else false.
      */
@@ -74,6 +77,23 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
         return worldConfig.isLoadedWorld();
     }
 
+    /**
+     * Attempts to get loaded world instance. Only returns a value if the world is loaded at the time of calling, even
+     * if this is a stored instance of {@link LoadedMultiverseWorld}.
+     * <br/>
+     * You may use {@link #isLoaded()} to check if the world is loaded first.
+     *
+     * @return Loaded world instance wrapped in an Option, or None if the world is not loaded.
+     *
+     * @since 5.5
+     */
+    @ApiStatus.AvailableSince("5.5")
+    public Option<LoadedMultiverseWorld> asLoadedWorld() {
+        return Option.of(worldConfig.getMVWorld())
+                .filter(world -> world instanceof LoadedMultiverseWorld)
+                .map(world -> (LoadedMultiverseWorld) world);
+    }
+
     /**
      * Gets the properties handler of this world.
      *

src/main/java/org/mvplugins/multiverse/core/world/WorldConfig.java

@@ -1,6 +1,7 @@
 package org.mvplugins.multiverse.core.world;
 
 import java.util.List;
+import java.util.Locale;
 import java.util.concurrent.atomic.AtomicReference;
 
 import com.dumptruckman.minecraft.util.Logging;
@@ -129,7 +130,9 @@ final class WorldConfig {
     }
 
     Try<Void> save() {
-        return configHandle.save();
+        return configHandle.save().onFailure(ex ->
+                Logging.warning("Failed to save world config for world '%s'. %s",
+                        worldName, ex.getLocalizedMessage()));
     }
 
     ConfigurationSection getConfigurationSection() {
@@ -378,6 +381,10 @@ final class WorldConfig {
         configNodes.setWorld(world);
     }
 
+    MultiverseWorld getMVWorld() {
+        return configNodes.getWorld();
+    }
+
     boolean isLoadedWorld() {
         return configNodes.getWorld() instanceof LoadedMultiverseWorld;
     }
@@ -417,7 +424,7 @@ final class WorldConfig {
 
             if (alias.get().isEmpty()) return;
 
-            Try.of(() -> Enum.valueOf(EnglishChatColor.class, color.toUpperCase()))
+            Try.of(() -> Enum.valueOf(EnglishChatColor.class, color.toUpperCase(Locale.ENGLISH)))
                     .map(c -> c.color)
                     .onSuccess(c -> {
                         if (c != ChatColor.WHITE) {
@@ -425,7 +432,7 @@ final class WorldConfig {
                         }
                     });
 
-            Try.of(() -> Enum.valueOf(EnglishChatStyle.class, style.toUpperCase()))
+            Try.of(() -> Enum.valueOf(EnglishChatStyle.class, style.toUpperCase(Locale.ENGLISH)))
                     .map(c -> c.color)
                     .onSuccess(s -> {
                         if (s != null) {

src/main/java/org/mvplugins/multiverse/core/world/WorldConfigNodes.java

@@ -16,6 +16,7 @@ import org.bukkit.configuration.MemoryConfiguration;
 import org.jetbrains.annotations.NotNull;
 
 import org.mvplugins.multiverse.core.MultiverseCore;
+import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.config.node.serializer.NodeSerializer;
 import org.mvplugins.multiverse.core.event.world.MVWorldPropertyChangedEvent;
 import org.mvplugins.multiverse.core.config.node.ConfigNode;
@@ -37,11 +38,13 @@ final class WorldConfigNodes {
     private final NodeGroup nodes = new NodeGroup();
     private WorldManager worldManager;
     private EnforcementHandler enforcementHandler;
+    private CoreConfig config;
     private MultiverseWorld world = null;
 
     WorldConfigNodes(@NotNull MultiverseCore multiverseCore) {
         this.worldManager = multiverseCore.getServiceLocator().getService(WorldManager.class);
         this.enforcementHandler = multiverseCore.getServiceLocator().getService(EnforcementHandler.class);
+        this.config = multiverseCore.getServiceLocator().getService(CoreConfig.class);
     }
 
     MultiverseWorld getWorld() {
@@ -57,11 +60,15 @@ final class WorldConfigNodes {
     }
 
     private <T> ConfigNode<T> node(ConfigNode.Builder<T, ?> nodeBuilder) {
-        nodeBuilder.onSetValue((oldValue, newValue) -> {
+        nodeBuilder.onChange((oldValue, newValue) -> {
             if (Objects.equals(oldValue, newValue)) return;
             if (world == null) return;
             MVWorldPropertyChangedEvent<?> mvWorldPropertyChangeEvent = new MVWorldPropertyChangedEvent<>(
-                    world, Option.of(nodeBuilder.name()).getOrElse(nodeBuilder.path()), oldValue, newValue);
+                    world,
+                    Option.of(nodeBuilder.name()).getOrElse(nodeBuilder.path()),
+                    oldValue,
+                    newValue
+            );
             Bukkit.getPluginManager().callEvent(mvWorldPropertyChangeEvent);
             Logging.finer("MVWorldPropertyChangeEvent fired for world '%s' with name '%s' and value '%s'",
                     world.getName(), nodeBuilder.path(), newValue);
@@ -80,7 +87,7 @@ final class WorldConfigNodes {
 
     final ConfigNode<String> alias = node(ConfigNode.builder("alias", String.class)
             .defaultValue("")
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (world == null) return;
                 world.updateColourlessAlias();
             }));
@@ -90,14 +97,14 @@ final class WorldConfigNodes {
 
     final ConfigNode<Boolean> allowFlight = node(ConfigNode.builder("allow-flight", Boolean.class)
             .defaultValue(false)
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (!(world instanceof LoadedMultiverseWorld loadedWorld)) return;
                 enforcementHandler.handleAllFlightEnforcement(loadedWorld);
             }));
 
     final ConfigNode<Boolean> allowWeather = node(ConfigNode.builder("allow-weather", Boolean.class)
             .defaultValue(true)
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (!(world instanceof LoadedMultiverseWorld loadedWorld)) return;
                 loadedWorld.getBukkitWorld().peek(world -> {
                     if (!world.isClearWeather() && !newValue) {
@@ -125,7 +132,7 @@ final class WorldConfigNodes {
 
     final ConfigNode<Difficulty> difficulty = node(ConfigNode.builder("difficulty", Difficulty.class)
             .defaultValue(Difficulty.NORMAL)
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (!(world instanceof LoadedMultiverseWorld loadedWorld)) return;
                 loadedWorld.getBukkitWorld().peek(bukkitWorld -> bukkitWorld.setDifficulty(newValue));
             }));
@@ -172,7 +179,7 @@ final class WorldConfigNodes {
 
     final ConfigNode<GameMode> gamemode = node(ConfigNode.builder("gamemode", GameMode.class)
             .defaultValue(GameMode.SURVIVAL)
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (!(world instanceof LoadedMultiverseWorld loadedWorld)) return;
                 enforcementHandler.handleAllGameModeEnforcement(loadedWorld);
             }));
@@ -191,7 +198,7 @@ final class WorldConfigNodes {
     final ConfigNode<Boolean> keepSpawnInMemory = node(ConfigNode
             .builder("keep-spawn-in-memory", Boolean.class)
             .defaultValue(true)
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (!(world instanceof LoadedMultiverseWorld loadedWorld)) return;
                 loadedWorld.getBukkitWorld().peek(bukkitWorld -> bukkitWorld.setKeepSpawnInMemory(newValue));
             }));
@@ -205,7 +212,7 @@ final class WorldConfigNodes {
 
     final ConfigNode<Boolean> pvp = node(ConfigNode.builder("pvp", Boolean.class)
             .defaultValue(true)
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (!(world instanceof LoadedMultiverseWorld loadedWorld)) return;
                 loadedWorld.getBukkitWorld().peek(bukkitWorld -> bukkitWorld.setPVP(newValue));
             }));
@@ -234,17 +241,17 @@ final class WorldConfigNodes {
     final ConfigNode<SpawnLocation> spawnLocation = node(ConfigNode.builder("spawn-location", SpawnLocation.class)
             .defaultValue(NullSpawnLocation.get())
             .hidden()
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 if (!(world instanceof LoadedMultiverseWorld loadedWorld)) return;
                 if (newValue == null || newValue instanceof NullSpawnLocation) return;
                 loadedWorld.getBukkitWorld().peek(bukkitWorld -> {
-                    bukkitWorld.setSpawnLocation(newValue.getBlockX(), newValue.getBlockY(), newValue.getBlockZ());
                     newValue.setWorld(bukkitWorld);
+                    bukkitWorld.setSpawnLocation(newValue);
                 });
             }));
 
     final ConfigNode<EntitySpawnConfig> enititySpawnConfig = node(ConfigNode.builder("spawning", EntitySpawnConfig.class)
-            .defaultValue(() -> EntitySpawnConfig.fromSection(new MemoryConfiguration()))
+            .defaultValue(() -> EntitySpawnConfig.fromSection(config, new MemoryConfiguration()))
             .hidden()
             .serializer(new NodeSerializer<>() {
                 @Override
@@ -252,7 +259,7 @@ final class WorldConfigNodes {
                     ConfigurationSection spawnSection = (object instanceof ConfigurationSection section)
                             ? section
                             : new MemoryConfiguration();
-                    return EntitySpawnConfig.fromSection(spawnSection);
+                    return EntitySpawnConfig.fromSection(config, spawnSection);
                 }
 
                 @Override
@@ -260,7 +267,7 @@ final class WorldConfigNodes {
                     return object.toSection();
                 }
             })
-            .onSetValue((oldValue, newValue) -> {
+            .onLoadAndChange((oldValue, newValue) -> {
                 newValue.setWorldRef(world);
                 newValue.applyConfigToWorld();
             }));

src/main/java/org/mvplugins/multiverse/core/world/WorldManager.java

@@ -1,11 +1,11 @@
 package org.mvplugins.multiverse.core.world;
 
 import java.io.File;
+import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -15,16 +15,17 @@ import java.util.stream.Collectors;
 
 import com.dumptruckman.minecraft.util.Logging;
 import com.google.common.base.Strings;
+import io.papermc.lib.PaperLib;
 import io.vavr.control.Option;
 import io.vavr.control.Try;
 import jakarta.inject.Inject;
 import org.bukkit.Bukkit;
-import org.bukkit.ChatColor;
 import org.bukkit.Location;
 import org.bukkit.World;
 import org.bukkit.WorldCreator;
 import org.bukkit.WorldType;
 import org.bukkit.plugin.PluginManager;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jvnet.hk2.annotations.Service;
@@ -45,6 +46,8 @@ import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.permissions.CorePermissions;
 import org.mvplugins.multiverse.core.teleportation.BlockSafety;
 import org.mvplugins.multiverse.core.teleportation.LocationManipulation;
+import org.mvplugins.multiverse.core.utils.CaseInsensitiveStringMap;
+import org.mvplugins.multiverse.core.utils.ReflectHelper;
 import org.mvplugins.multiverse.core.utils.ServerProperties;
 import org.mvplugins.multiverse.core.utils.result.Attempt;
 import org.mvplugins.multiverse.core.utils.result.FailureReason;
@@ -62,7 +65,9 @@ import org.mvplugins.multiverse.core.world.options.CreateWorldOptions;
 import org.mvplugins.multiverse.core.world.options.DeleteWorldOptions;
 import org.mvplugins.multiverse.core.world.options.ImportWorldOptions;
 import org.mvplugins.multiverse.core.world.options.KeepWorldSettingsOptions;
+import org.mvplugins.multiverse.core.world.options.LoadWorldOptions;
 import org.mvplugins.multiverse.core.world.options.RegenWorldOptions;
+import org.mvplugins.multiverse.core.world.options.RemoveWorldOptions;
 import org.mvplugins.multiverse.core.world.options.UnloadWorldOptions;
 import org.mvplugins.multiverse.core.world.reasons.CloneFailureReason;
 import org.mvplugins.multiverse.core.world.reasons.CreateFailureReason;
@@ -85,8 +90,8 @@ public final class WorldManager {
     private static final DimensionFormat DEFAULT_NETHER_FORMAT = new DimensionFormat("%overworld%_nether");
     private static final DimensionFormat DEFAULT_END_FORMAT = new DimensionFormat("%overworld%_the_end");
 
-    private final Map<String, MultiverseWorld> worldsMap;
-    private final Map<String, LoadedMultiverseWorld> loadedWorldsMap;
+    private final CaseInsensitiveStringMap<MultiverseWorld> worldsMap;
+    private final CaseInsensitiveStringMap<LoadedMultiverseWorld> loadedWorldsMap;
     private final List<String> unloadTracker;
     private final List<String> loadTracker;
     private final WorldsConfigManager worldsConfigManager;
@@ -129,8 +134,8 @@ public final class WorldManager {
         this.config = config;
         this.entityPurger = entityPurger;
 
-        this.worldsMap = new HashMap<>();
-        this.loadedWorldsMap = new HashMap<>();
+        this.worldsMap = new CaseInsensitiveStringMap<>();
+        this.loadedWorldsMap = new CaseInsensitiveStringMap<>();
         this.unloadTracker = new ArrayList<>();
         this.loadTracker = new ArrayList<>();
     }
@@ -140,6 +145,7 @@ public final class WorldManager {
      *
      * @return The result of the load.
      */
+    @ApiStatus.Internal
     public Try<Void> initAllWorlds() {
         return updateWorldsFromConfig().andThenTry(() -> {
             importExistingWorlds();
@@ -167,9 +173,13 @@ public final class WorldManager {
     }
 
     private void removeWorldsNotInConfigs(Collection<String> removedWorlds) {
-        removedWorlds.forEach(worldName -> removeWorld(worldName)
-                .onFailure(failure -> Logging.severe("Failed to unload world %s: %s", worldName, failure))
-                .onSuccess(success -> Logging.fine("Unloaded world %s as it was removed from config", worldName)));
+        removedWorlds.forEach(worldName -> getWorld(worldName)
+                .map(world -> removeWorld(RemoveWorldOptions.world(world)))
+                .getOrElse(() -> worldActionResult(RemoveFailureReason.WORLD_NON_EXISTENT, worldName))
+                .onFailure(failure ->
+                        Logging.severe("Failed to unload world %s: %s", worldName, failure))
+                .onSuccess(success ->
+                        Logging.fine("Unloaded world %s as it was removed from config", worldName)));
     }
 
     /**
@@ -198,29 +208,29 @@ public final class WorldManager {
     }
 
     private void importExistingBukkitWorld(World bukkitWorld) {
-        if (bukkitWorld == null || isWorld(bukkitWorld.getName())) {
-            return;
-        }
-        importWorld(ImportWorldOptions.worldName(bukkitWorld.getName())
-                .environment(bukkitWorld.getEnvironment())
-                .generator(generatorProvider.getDefaultGeneratorForWorld(bukkitWorld.getName())))
-                .onFailure(failure ->
-                        Logging.severe("Failed to import world %s: %s", bukkitWorld.getName(), failure))
-                .onSuccess(success ->
-                        Logging.fine("Imported existing world %s", bukkitWorld.getName()));
+        Option.of(bukkitWorld)
+                .filter(world -> !isWorld(world.getName()))
+                .map(world -> importWorld(
+                        ImportWorldOptions.worldName(world.getName())
+                                .environment(world.getEnvironment())
+                                .generator(generatorProvider.getDefaultGeneratorForWorld(world.getName())))
+                        .onFailure(failure ->
+                                Logging.severe("Failed to import world %s: %s", world.getName(), failure))
+                        .onSuccess(newMVWorld ->
+                                Logging.fine("Imported existing world %s", newMVWorld.getName())));
     }
 
     /**
      * Loads all worlds that are set to autoload.
      */
     private void autoLoadWorlds() {
-        getWorlds().forEach(world -> {
-            if (isLoadedWorld(world) || !world.isAutoLoad()) {
-                return;
-            }
-            loadWorld(world).onFailure(failure -> Logging.severe("Failed to load world %s: %s",
-                    world.getName(), failure));
-        });
+        getWorlds().stream()
+                .filter(world -> !isLoadedWorld(world) && world.isAutoLoad())
+                .forEach(world -> loadWorld(LoadWorldOptions.world(world))
+                        .onFailure(failure ->
+                                Logging.severe("Failed to autoload world %s: %s", world.getName(), failure))
+                        .onSuccess(newMVWorld ->
+                                Logging.fine("Autoloaded world %s", newMVWorld.getName())));
     }
 
     /**
@@ -261,15 +271,21 @@ public final class WorldManager {
                 .mapAttempt(creator -> addGeneratorToCreator(creator, generatorString))
                 .mapAttempt(this::createBukkitWorld)
                 .transform(CreateFailureReason.WORLD_CREATOR_FAILED)
-                .map(bukkitWorld -> {
-                    LoadedMultiverseWorld loadedWorld = newLoadedMultiverseWorld(
+                .map(bukkitWorld -> newLoadedMultiverseWorld(
                             bukkitWorld,
                             generatorString,
                             options.biome(),
-                            options.useSpawnAdjust());
-                    pluginManager.callEvent(new MVWorldCreatedEvent(loadedWorld));
-                    return loadedWorld;
-                });
+                            options.useSpawnAdjust()))
+                .peek(loadedWorld -> postCreateWorld(loadedWorld, options));
+    }
+
+    private void postCreateWorld(LoadedMultiverseWorld loadedWorld, CreateWorldOptions options) {
+        options.worldPropertyStrings().forEach((key, value) -> loadedWorld.getStringPropertyHandle()
+                .setPropertyString(key, value)
+                .onFailure(failure -> Logging.warning("Failed to set property '%s' to '%s' for world %s: %s",
+                        key, value, loadedWorld.getName(), failure.getMessage())));
+        pluginManager.callEvent(new MVWorldCreatedEvent(loadedWorld));
+        saveWorldsConfig();
     }
 
     /**
@@ -278,23 +294,25 @@ public final class WorldManager {
      * @param options The options for customizing the import of an existing world folder.
      * @return The result of the import.
      */
-    public Attempt<LoadedMultiverseWorld, ImportFailureReason> importWorld(
-            ImportWorldOptions options) {
-        return validateImportWorldOptions(options).mapAttempt(this::doImportWorld);
-    }
-
-    private Attempt<ImportWorldOptions, ImportFailureReason> validateImportWorldOptions(
-            ImportWorldOptions options) {
+    public Attempt<LoadedMultiverseWorld, ImportFailureReason> importWorld(ImportWorldOptions options) {
         String worldName = options.worldName();
-        if (!worldNameChecker.isValidWorldName(worldName)) {
-            return worldActionResult(ImportFailureReason.INVALID_WORLDNAME, worldName);
-        } else if (!worldNameChecker.isValidWorldFolder(worldName)) {
-            return worldActionResult(ImportFailureReason.WORLD_FOLDER_INVALID, worldName);
-        } else if (isLoadedWorld(worldName)) {
+        if (isLoadedWorld(worldName)) {
             return worldActionResult(ImportFailureReason.WORLD_EXIST_LOADED, worldName);
         } else if (isWorld(worldName)) {
             return worldActionResult(ImportFailureReason.WORLD_EXIST_UNLOADED, worldName);
         }
+        return Option.of(Bukkit.getWorld(worldName))
+                .map(bukkitWorld -> doImportBukkitWorld(options, bukkitWorld))
+                .getOrElse(() -> validateImportWorldOptions(options).mapAttempt(this::doImportWorld));
+    }
+
+    private Attempt<ImportWorldOptions, ImportFailureReason> validateImportWorldOptions(ImportWorldOptions options) {
+        String worldName = options.worldName();
+        if (!worldNameChecker.isValidWorldName(worldName)) {
+            return worldActionResult(ImportFailureReason.INVALID_WORLDNAME, worldName);
+        } else if (options.doFolderCheck() && !worldNameChecker.isValidWorldFolder(worldName)) {
+            return worldActionResult(ImportFailureReason.WORLD_FOLDER_INVALID, worldName);
+        }
         return worldActionResult(options);
     }
 
@@ -308,15 +326,29 @@ public final class WorldManager {
                 .mapAttempt(creator -> addGeneratorToCreator(creator, generatorString))
                 .mapAttempt(this::createBukkitWorld)
                 .transform(ImportFailureReason.WORLD_CREATOR_FAILED)
-                .map(bukkitWorld -> {
-                    LoadedMultiverseWorld loadedWorld = newLoadedMultiverseWorld(
-                            bukkitWorld,
-                            generatorString,
-                            options.biome(),
-                            options.useSpawnAdjust());
-                    pluginManager.callEvent(new MVWorldImportedEvent(loadedWorld));
-                    return loadedWorld;
-                });
+                .map(bukkitWorld -> newLoadedMultiverseWorld(
+                        bukkitWorld,
+                        generatorString,
+                        options.biome(),
+                        options.useSpawnAdjust()))
+                .peek(loadedWorld -> pluginManager.callEvent(new MVWorldImportedEvent(loadedWorld)));
+    }
+
+    private Attempt<LoadedMultiverseWorld, ImportFailureReason> doImportBukkitWorld(ImportWorldOptions options, World bukkitWorld) {
+        if (options.environment() != bukkitWorld.getEnvironment()) {
+            return Attempt.failure(ImportFailureReason.BUKKIT_ENVIRONMENT_MISMATCH,
+                    Replace.WORLD.with(bukkitWorld.getName()),
+                    replace("{bukkitEnvironment}").with(bukkitWorld.getEnvironment().name()),
+                    replace("{mvEnvironment}").with(options.environment().name()));
+        }
+
+        LoadedMultiverseWorld loadedWorld = newLoadedMultiverseWorld(
+                bukkitWorld,
+                generatorProvider.parseGeneratorString(options.worldName(), options.generator()),
+                options.biome(),
+                options.useSpawnAdjust());
+        pluginManager.callEvent(new MVWorldImportedEvent(loadedWorld));
+        return Attempt.success(loadedWorld);
     }
 
     private MultiverseWorld newMultiverseWorld(String worldName, WorldConfig worldConfig) {
@@ -336,12 +368,20 @@ public final class WorldManager {
     private LoadedMultiverseWorld newLoadedMultiverseWorld(
             @NotNull World world, @Nullable String generator, @Nullable String biome, boolean adjustSpawn) {
         WorldConfig worldConfig = worldsConfigManager.addWorldConfig(world.getName());
+
+        // Properties from multiverse input
         worldConfig.setAdjustSpawn(adjustSpawn);
         worldConfig.setGenerator(generator == null ? "" : generator);
         worldConfig.setBiome(biome == null ? "" : biome);
+
+        // Properties from the bukkit world
+        worldConfig.setDifficulty(world.getDifficulty());
+        worldConfig.setKeepSpawnInMemory(world.getKeepSpawnInMemory());
+        worldConfig.setScale(getCoordinateScale(world));
+
         worldConfig.save();
 
-        MultiverseWorld mvWorld = newMultiverseWorld(world.getName(), worldConfig);
+        newMultiverseWorld(world.getName(), worldConfig);
         LoadedMultiverseWorld loadedWorld = new LoadedMultiverseWorld(
                 world,
                 worldConfig,
@@ -350,20 +390,21 @@ public final class WorldManager {
                 locationManipulation,
                 entityPurger
         );
-        setDefaultEnvironmentScale(mvWorld);
         loadedWorldsMap.put(loadedWorld.getName(), loadedWorld);
         saveWorldsConfig();
         pluginManager.callEvent(new MVWorldLoadedEvent(loadedWorld));
         return loadedWorld;
     }
 
-    private void setDefaultEnvironmentScale(MultiverseWorld world) {
-        double scale = switch (world.getEnvironment()) {
-            case NETHER -> 8.0;
-            case THE_END -> 16.0;
-            default -> 1.0;
+    private double getCoordinateScale(World world) {
+        if (PaperLib.isPaper()) {
+            return world.getCoordinateScale();
+        }
+        return switch (world.getEnvironment()) {
+            case NORMAL -> 1;
+            case NETHER -> 8;
+            default -> 1;
         };
-        world.setScale(scale);
     }
 
     /**
@@ -371,10 +412,14 @@ public final class WorldManager {
      *
      * @param worldName The name of the world to load.
      * @return The result of the load.
+     *
+     * @deprecated Use {@link #loadWorld(LoadWorldOptions)} instead.
      */
+    @Deprecated(since = "5.2", forRemoval = true)
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     public Attempt<LoadedMultiverseWorld, LoadFailureReason> loadWorld(@NotNull String worldName) {
         return getWorld(worldName)
-                .map(this::loadWorld)
+                .map(world -> loadWorld(LoadWorldOptions.world(world)))
                 .getOrElse(() -> worldNameChecker.isValidWorldFolder(worldName)
                         ? worldActionResult(LoadFailureReason.WORLD_EXIST_FOLDER, worldName)
                         : worldActionResult(LoadFailureReason.WORLD_NON_EXISTENT, worldName));
@@ -385,12 +430,30 @@ public final class WorldManager {
      *
      * @param world The world to load.
      * @return The result of the load.
+     *
+     * @deprecated Use {@link #loadWorld(LoadWorldOptions)} instead.
      */
+    @Deprecated(since = "5.2", forRemoval = true)
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     public Attempt<LoadedMultiverseWorld, LoadFailureReason> loadWorld(@NotNull MultiverseWorld world) {
-        return validateWorldToLoad(world).mapAttempt(this::doLoadWorld);
+        return loadWorld(LoadWorldOptions.world(world));
     }
 
-    private Attempt<MultiverseWorld, LoadFailureReason> validateWorldToLoad(@NotNull MultiverseWorld mvWorld) {
+    /**
+     * Loads an existing world in config.
+     *
+     * @param options The options for customizing the loading of a world.
+     * @return The result of the load.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public Attempt<LoadedMultiverseWorld, LoadFailureReason> loadWorld(@NotNull LoadWorldOptions options) {
+        return validateWorldToLoad(options).mapAttempt(this::doLoadWorld);
+    }
+
+    private Attempt<LoadWorldOptions, LoadFailureReason> validateWorldToLoad(@NotNull LoadWorldOptions options) {
+        MultiverseWorld mvWorld = options.world();
         if (loadTracker.contains(mvWorld.getName())) {
             // This is to prevent recursive calls by WorldLoadEvent
             Logging.fine("World already loading: " + mvWorld.getName());
@@ -399,15 +462,19 @@ public final class WorldManager {
             Logging.severe("World already loaded: " + mvWorld.getName());
             return worldActionResult(LoadFailureReason.WORLD_EXIST_LOADED, mvWorld.getName());
         }
-        return worldActionResult(mvWorld);
+        return worldActionResult(options);
     }
 
-    private Attempt<LoadedMultiverseWorld, LoadFailureReason> doLoadWorld(@NotNull MultiverseWorld mvWorld) {
+    private Attempt<LoadedMultiverseWorld, LoadFailureReason> doLoadWorld(@NotNull LoadWorldOptions options) {
+        MultiverseWorld mvWorld = options.world();
+
         World bukkitWorld = Bukkit.getWorld(mvWorld.getName());
         if (bukkitWorld != null) {
-            // World already loaded, maybe by another plugin
-            Logging.finer("World already loaded in bukkit: " + mvWorld.getName());
-            return newLoadedMultiverseWorld(mvWorld, bukkitWorld);
+            return doLoadBukkitWorld(bukkitWorld, mvWorld);
+        }
+
+        if (options.doFolderCheck() && !worldNameChecker.isValidWorldFolder(mvWorld.getName())) {
+            return worldActionResult(LoadFailureReason.WORLD_FOLDER_INVALID, mvWorld.getName());
         }
 
         WorldCreator worldCreator = WorldCreator.name(mvWorld.getName())
@@ -420,6 +487,18 @@ public final class WorldManager {
                 .mapAttempt(newBukkitWorld -> newLoadedMultiverseWorld(mvWorld, newBukkitWorld));
     }
 
+    private @NotNull Attempt<LoadedMultiverseWorld, LoadFailureReason> doLoadBukkitWorld(World bukkitWorld, MultiverseWorld mvWorld) {
+        if (bukkitWorld.getEnvironment() != mvWorld.getEnvironment()) {
+            return Attempt.failure(LoadFailureReason.BUKKIT_ENVIRONMENT_MISMATCH,
+                    Replace.WORLD.with(mvWorld.getName()),
+                    replace("{bukkitEnvironment}").with(bukkitWorld.getEnvironment().name()),
+                    replace("{mvEnvironment}").with(mvWorld.getEnvironment().name()));
+        }
+        // World already loaded, maybe by another plugin
+        Logging.finer("World already loaded in bukkit: " + mvWorld.getName());
+        return newLoadedMultiverseWorld(mvWorld, bukkitWorld);
+    }
+
     private Attempt<LoadedMultiverseWorld, LoadFailureReason> newLoadedMultiverseWorld(MultiverseWorld mvWorld, World bukkitWorld) {
         WorldConfig worldConfig = worldsConfigManager.getWorldConfig(mvWorld.getName()).get(); //TODO: null check here, but logically it should never be null.
         LoadedMultiverseWorld loadedWorld = new LoadedMultiverseWorld(
@@ -481,11 +560,14 @@ public final class WorldManager {
      *
      * @param worldName The name of the world to remove.
      * @return The result of the remove.
+     *
+     * @deprecated Get the {@link MultiverseWorld} yourself and use {@link #removeWorld(RemoveWorldOptions)} instead.
      */
-    public Attempt<String, RemoveFailureReason> removeWorld(
-            @NotNull String worldName) {
+    @Deprecated(since = "5.2", forRemoval = true)
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
+    public Attempt<String, RemoveFailureReason> removeWorld(@NotNull String worldName) {
         return getWorld(worldName)
-                .map(this::removeWorld)
+                .map(world -> removeWorld(RemoveWorldOptions.world(world)))
                 .getOrElse(() -> worldActionResult(RemoveFailureReason.WORLD_NON_EXISTENT, worldName));
     }
 
@@ -495,11 +577,13 @@ public final class WorldManager {
      *
      * @param world The multiverse world to remove.
      * @return The result of the remove.
+     *
+     * @deprecated Use {@link #removeWorld(RemoveWorldOptions)} instead.
      */
+    @Deprecated(since = "5.2", forRemoval = true)
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     public Attempt<String, RemoveFailureReason> removeWorld(@NotNull MultiverseWorld world) {
-        return getLoadedWorld(world).fold(
-                () -> removeWorldFromConfig(world),
-                this::removeWorld);
+        return removeWorld(RemoveWorldOptions.world(world));
     }
 
     /**
@@ -508,9 +592,40 @@ public final class WorldManager {
      *
      * @param loadedWorld The multiverse world to remove.
      * @return The result of the remove.
+     *
+     * @deprecated Use {@link #removeWorld(RemoveWorldOptions)} instead.
      */
+    @Deprecated(since = "5.2", forRemoval = true)
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     public Attempt<String, RemoveFailureReason> removeWorld(@NotNull LoadedMultiverseWorld loadedWorld) {
-        return unloadWorld(UnloadWorldOptions.world(loadedWorld))
+        return removeWorld(RemoveWorldOptions.world(loadedWorld));
+    }
+
+    /**
+     * Removes an existing multiverse world. It will be deleted from the worlds config and will no longer be known
+     * to Multiverse. World files will not be deleted.
+     *
+     * @param options The options for customizing the removal of a world.
+     * @return The result of the remove action.
+     *
+     * @since 5.2
+     */
+    @ApiStatus.AvailableSince("5.2")
+    public Attempt<String, RemoveFailureReason> removeWorld(@NotNull RemoveWorldOptions options) {
+        MultiverseWorld world = options.world();
+        return getLoadedWorld(world).fold(
+                () -> removeWorldFromConfig(world),
+                loadedWorld -> unloadBeforeRemoveWorld(loadedWorld, options)
+        );
+    }
+
+    private Attempt<String, RemoveFailureReason> unloadBeforeRemoveWorld(@NotNull LoadedMultiverseWorld loadedWorld,
+                                                                         @NotNull RemoveWorldOptions options) {
+        UnloadWorldOptions unloadWorldOptions = UnloadWorldOptions.world(loadedWorld)
+                .saveBukkitWorld(options.saveBukkitWorld())
+                .unloadBukkitWorld(options.unloadBukkitWorld());
+
+        return unloadWorld(unloadWorldOptions)
                 .transform(RemoveFailureReason.UNLOAD_FAILED)
                 .mapAttempt(this::removeWorldFromConfig);
     }
@@ -541,12 +656,18 @@ public final class WorldManager {
      */
     public Attempt<String, DeleteFailureReason> deleteWorld(@NotNull DeleteWorldOptions options) {
         return getLoadedWorld(options.world()).fold(
-                () -> loadWorld(options.world())
-                        .transform(DeleteFailureReason.LOAD_FAILED)
-                        .mapAttempt(world -> doDeleteWorld(world, options)),
+                () -> loadThenDeleteWorld(options),
                 world -> doDeleteWorld(world, options));
     }
 
+    private Attempt<String, DeleteFailureReason> loadThenDeleteWorld(@NotNull DeleteWorldOptions options) {
+        return loadWorld(LoadWorldOptions.world(options.world()))
+                .fold(
+                        ignore -> worldActionResult(DeleteFailureReason.LOAD_FAILED, options.world().getName()),
+                        loadedWorld -> doDeleteWorld(loadedWorld, options)
+                );
+    }
+
     /**
      * Deletes an existing multiverse world entirely. Warning: This will delete all world files.
      *
@@ -564,7 +685,11 @@ public final class WorldManager {
                             ? Attempt.failure(DeleteFailureReason.EVENT_CANCELLED)
                             : Attempt.success(null);
                 })
-                .mapAttempt(() -> removeWorld(world).transform(DeleteFailureReason.REMOVE_FAILED))
+                .mapAttempt(() -> removeWorld(RemoveWorldOptions
+                        .world(world)
+                        .unloadBukkitWorld(true)
+                        .saveBukkitWorld(false)
+                ).transform(DeleteFailureReason.REMOVE_FAILED))
                 .mapAttempt(() -> fileUtils.deleteFolder(worldFolder.get(), options.keepFiles()).fold(
                         exception -> worldActionResult(DeleteFailureReason.FAILED_TO_DELETE_FOLDER,
                                 world.getName(), exception),
@@ -573,12 +698,13 @@ public final class WorldManager {
 
     private Attempt<File, DeleteFailureReason> validateWorldToDelete(
             @NotNull LoadedMultiverseWorld world) {
-        File worldFolder = world.getBukkitWorld().map(World::getWorldFolder).getOrNull();
-        if (worldFolder == null || !worldNameChecker.isValidWorldFolder(worldFolder)) {
-            Logging.severe("Failed to get world folder for world: " + world.getName());
-            return worldActionResult(DeleteFailureReason.WORLD_FOLDER_NOT_FOUND, world.getName());
-        }
-        return worldActionResult(worldFolder);
+        return world.getBukkitWorld().map(World::getWorldFolder)
+                .filter(worldNameChecker::isValidWorldFolder)
+                .map(this::<File, DeleteFailureReason>worldActionResult)
+                .getOrElse(() -> {
+                    Logging.severe("World folder does not exist for world: " + world.getName());
+                    return worldActionResult(DeleteFailureReason.WORLD_FOLDER_NOT_FOUND, world.getName());
+                });
     }
 
     /**
@@ -632,7 +758,7 @@ public final class WorldManager {
     private Attempt<CloneWorldOptions, CloneFailureReason> cloneWorldCopyFolder(@NotNull CloneWorldOptions options) {
         if (options.saveBukkitWorld()) {
             Logging.finer("Saving bukkit world before cloning: " + options.world().getName());
-            options.world().getBukkitWorld().peek(World::save);
+            options.world().getBukkitWorld().peek(this::saveWorldWithFlush);
         }
         File worldFolder = options.world().getBukkitWorld().map(World::getWorldFolder).get();
         File newWorldFolder = new File(Bukkit.getWorldContainer(), options.newWorldName());
@@ -642,6 +768,17 @@ public final class WorldManager {
                 success -> worldActionResult(options));
     }
 
+    // This method is only available since 1.21
+    private final Method saveWithFlush = ReflectHelper.getMethod(World.class, "save", boolean.class);
+    private void saveWorldWithFlush(World world) {
+        if (saveWithFlush != null) {
+            Logging.fine("Using world save method with flush...");
+            ReflectHelper.invokeMethod(world, saveWithFlush, true);
+        } else {
+            world.save();
+        }
+    }
+
     private void cloneWorldTransferData(@NotNull CloneWorldOptions options, @NotNull LoadedMultiverseWorld newWorld) {
         DataTransfer<LoadedMultiverseWorld> dataTransfer = transferData(options, options.world());
         dataTransfer.pasteAllTo(newWorld);
@@ -839,7 +976,9 @@ public final class WorldManager {
      * @return The world if it exists.
      */
     public Option<MultiverseWorld> getWorld(@Nullable String worldName) {
-        return getLoadedWorld(worldName).fold(() -> getUnloadedWorld(worldName), Option::of);
+        return getLoadedWorld(worldName)
+                .map(world -> (MultiverseWorld) world)
+                .orElse(() -> getUnloadedWorld(worldName));
     }
 
     /**
@@ -851,7 +990,8 @@ public final class WorldManager {
      */
     public Option<MultiverseWorld> getWorldByNameOrAlias(@Nullable String worldNameOrAlias) {
         return getLoadedWorldByNameOrAlias(worldNameOrAlias)
-                .fold(() -> getUnloadedWorldByNameOrAlias(worldNameOrAlias), Option::of);
+                .map(world -> (MultiverseWorld) world)
+                .orElse(() -> getUnloadedWorldByNameOrAlias(worldNameOrAlias));
     }
 
     /**
@@ -866,7 +1006,8 @@ public final class WorldManager {
     public Collection<MultiverseWorld> getWorlds() {
         return worldsMap.values().stream()
                 .map(world -> getLoadedWorld(world)
-                        .fold(() -> world, loadedWorld -> loadedWorld))
+                        .map(loadedWorld -> (MultiverseWorld) loadedWorld)
+                        .getOrElse(world))
                 .toList();
     }
 
@@ -877,7 +1018,7 @@ public final class WorldManager {
      * @return True if the world is a world is known to multiverse, but may or may not be loaded.
      */
     public boolean isWorld(@Nullable String worldName) {
-        return worldsMap.containsKey(worldName);
+        return worldName != null && worldsMap.containsKey(worldName);
     }
 
     /**
@@ -887,7 +1028,9 @@ public final class WorldManager {
      * @return The world if it exists.
      */
     public Option<MultiverseWorld> getUnloadedWorld(@Nullable String worldName) {
-        return isLoadedWorld(worldName) ? Option.none() : Option.of(worldsMap.get(worldName));
+        return isLoadedWorld(worldName)
+                ? Option.none()
+                : Option.of(worldName).flatMap(name -> Option.of(worldsMap.get(name)));
     }
 
     /**
@@ -901,6 +1044,9 @@ public final class WorldManager {
     }
 
     private Option<MultiverseWorld> getUnloadedWorldByAlias(@Nullable String alias) {
+        if (alias == null || alias.isEmpty()) {
+            return Option.none();
+        }
         String colourlessAlias = ChatTextFormatter.removeColor(alias);
         return Option.ofOptional(worldsMap.values().stream()
                 .filter(world -> !world.isLoaded())
@@ -936,7 +1082,7 @@ public final class WorldManager {
      * @return The multiverse world if it exists.
      */
     public Option<LoadedMultiverseWorld> getLoadedWorld(@Nullable World world) {
-        return world == null ? Option.none() : Option.of((LoadedMultiverseWorld) loadedWorldsMap.get(world.getName()));
+        return Option.of(world).flatMap(notNullWorld -> getLoadedWorld(notNullWorld.getName()));
     }
 
     /**
@@ -946,7 +1092,7 @@ public final class WorldManager {
      * @return The multiverse world if it exists.
      */
     public Option<LoadedMultiverseWorld> getLoadedWorld(@Nullable MultiverseWorld world) {
-        return world == null ? Option.none() : Option.of((LoadedMultiverseWorld) loadedWorldsMap.get(world.getName()));
+        return Option.of(world).flatMap(notNullWorld -> getLoadedWorld(notNullWorld.getName()));
     }
 
     /**
@@ -956,7 +1102,8 @@ public final class WorldManager {
      * @return The multiverse world if it exists.
      */
     public Option<LoadedMultiverseWorld> getLoadedWorld(@Nullable String worldName) {
-        return Option.of((LoadedMultiverseWorld) loadedWorldsMap.get(worldName));
+        return Option.of(worldName)
+                .flatMap(name -> Option.of(loadedWorldsMap.get(name)));
     }
 
     /**
@@ -971,9 +1118,12 @@ public final class WorldManager {
     }
 
     private Option<LoadedMultiverseWorld> getLoadedWorldByAlias(@Nullable String alias) {
+        if (alias == null || alias.isEmpty()) {
+            return Option.none();
+        }
         return Option.ofOptional(loadedWorldsMap.values().stream()
-                .filter(world -> world.getColourlessAlias().equalsIgnoreCase(ChatColor.stripColor(alias)))
-                .map(world -> (LoadedMultiverseWorld) world)
+                .filter(world -> world.getColourlessAlias()
+                        .equalsIgnoreCase(ChatTextFormatter.removeColor(alias)))
                 .findFirst());
     }
 
@@ -984,7 +1134,6 @@ public final class WorldManager {
      */
     public Collection<LoadedMultiverseWorld> getLoadedWorlds() {
         return loadedWorldsMap.values().stream()
-                .map(world -> (LoadedMultiverseWorld) world)
                 .toList();
     }
 
@@ -1015,7 +1164,7 @@ public final class WorldManager {
      * @return True if the world is a multiverse world that is loaded.
      */
     public boolean isLoadedWorld(@Nullable String worldName) {
-        return loadedWorldsMap.containsKey(worldName);
+        return worldName != null && loadedWorldsMap.containsKey(worldName);
     }
 
     /**

src/main/java/org/mvplugins/multiverse/core/world/WorldsConfigManager.java

@@ -19,6 +19,7 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.MultiverseCore;
 
 import static java.nio.file.StandardCopyOption.COPY_ATTRIBUTES;
+import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
 
 /**
  * Manages the worlds.yml file.
@@ -81,10 +82,11 @@ final class WorldsConfigManager {
                     }
 
                     // Copy old config file to `worlds.yml.old`
-                    Path oldWorldConfig = worldConfigFile.toPath().getParent().resolve(CONFIG_FILENAME + ".old");
-                    Files.copy(worldConfigFile.toPath(), oldWorldConfig, COPY_ATTRIBUTES);
+                    Path oldWorldConfig = worldConfigFile.toPath().getParent()
+                            .resolve(CONFIG_FILENAME + ".old." + System.currentTimeMillis());
+                    Files.copy(worldConfigFile.toPath(), oldWorldConfig, COPY_ATTRIBUTES, REPLACE_EXISTING);
 
-                    return configData.replace("==: MVWorld", "")
+                    return configData.replace("==: MVWorld", "w@: world")
                             .replace("==: MVSpawnSettings", "")
                             .replace("==: MVSpawnSubSettings", "")
                             .replace("==: MVEntryFee", "");
@@ -92,16 +94,26 @@ final class WorldsConfigManager {
                 .andThenTry(configData -> Files.writeString(worldConfigFile.toPath(), configData))
                 .andThenTry(() -> {
                     YamlConfiguration config = YamlConfiguration.loadConfiguration(worldConfigFile);
-                    List<ConfigurationSection> worlds = config.getConfigurationSection("worlds")
-                            .getKeys(false)
-                            .stream()
-                            .map(worldName -> config.getConfigurationSection("worlds." + worldName))
-                            .toList();
+
+                    ConfigurationSection worldsSection = config.getConfigurationSection("worlds");
+                    if (worldsSection == null) {
+                        worldsSection = config.createSection("worlds");
+                    }
+
+                    List<String> worldNames = getOldConfigWorldNames(worldsSection);
+
+                    Map<String, ConfigurationSection> worldConfigMap = new HashMap<>();
+                    for (String worldName : worldNames) {
+                        ConfigurationSection worldSection = worldsSection.getConfigurationSection(worldName);
+                        if (worldSection != null) {
+                            worldConfigMap.put(worldName, worldSection);
+                        }
+                    }
 
                     config.set("worlds", null);
 
-                    for (ConfigurationSection world : worlds) {
-                        config.createSection(world.getName(), world.getValues(true));
+                    for (Map.Entry<String, ConfigurationSection> entry : worldConfigMap.entrySet()) {
+                        config.set(encodeWorldName(entry.getKey()), entry.getValue());
                     }
                     config.save(worldConfigFile);
                 })
@@ -115,6 +127,35 @@ final class WorldsConfigManager {
                 });
     }
 
+    private @NotNull List<String> getOldConfigWorldNames(ConfigurationSection worldsSection) {
+        List<String> worldNames = new ArrayList<>();
+        recursiveGetOldConfigWorldNames(worldsSection, worldNames);
+        return worldNames;
+    }
+
+    private void recursiveGetOldConfigWorldNames(ConfigurationSection section, List<String> worldNames) {
+        Set<String> keys = section.getKeys(false);
+        if (keys.isEmpty()) {
+            // No keys in this section, nothing to do
+            return;
+        }
+
+        if (keys.contains("w@")) {
+            // this is the world data section already, get path without the "worlds." prefix
+            worldNames.add(section.getCurrentPath().substring(7));
+            return;
+        }
+
+        for (String key : keys) {
+            ConfigurationSection dataSection = section.getConfigurationSection(key);
+            if (dataSection == null) {
+                // Something is wrong with the config, skip this key
+                continue;
+            }
+            recursiveGetOldConfigWorldNames(dataSection, worldNames);
+        }
+    }
+
     /**
      * Parses the worlds.yml file and creates a WorldConfig for each world in the file if it doesn't already exist.
      *

src/main/java/org/mvplugins/multiverse/core/world/biomeprovider/SingleBiomeProviderParser.java

@@ -1,5 +1,7 @@
 package org.mvplugins.multiverse.core.world.biomeprovider;
 
+import org.bukkit.NamespacedKey;
+import org.bukkit.Registry;
 import org.bukkit.block.Biome;
 import org.bukkit.generator.BiomeProvider;
 import org.jetbrains.annotations.NotNull;
@@ -7,6 +9,7 @@ import org.jetbrains.annotations.NotNull;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
+import java.util.Locale;
 
 /**
  * A parser for {@link SingleBiomeProvider}
@@ -17,13 +20,16 @@ final class SingleBiomeProviderParser implements BiomeProviderParser {
 
     @Override
     public BiomeProvider parseBiomeProvider(@NotNull String worldName, @NotNull String params) {
-        return new SingleBiomeProvider(Biome.valueOf(params.toUpperCase()));
+        NamespacedKey biomeKey = NamespacedKey.fromString(params.toLowerCase(Locale.ENGLISH));
+        return new SingleBiomeProvider(Registry.BIOME.get(biomeKey));
     }
 
     @Override
     public Collection<String> suggestParams(@NotNull String currentInput) {
         if (biomes == null) {
-            biomes = Arrays.stream(Biome.values()).map(biome -> biome.toString().toLowerCase()).toList();
+            biomes = Registry.BIOME.stream()
+                    .map(biome -> biome.getKey().getKey().toLowerCase(Locale.ENGLISH))
+                    .toList();
         }
         return biomes;
     }

src/main/java/org/mvplugins/multiverse/core/world/entity/EntitySpawnConfig.java

@@ -1,29 +1,36 @@
 package org.mvplugins.multiverse.core.world.entity;
 
 import com.dumptruckman.minecraft.util.Logging;
-import org.bukkit.World;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.configuration.MemoryConfiguration;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.SpawnCategory;
 import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.utils.StringFormatter;
 import org.mvplugins.multiverse.core.world.MultiverseWorld;
 
-import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.Locale;
 import java.util.Map;
 
 public final class EntitySpawnConfig {
 
+    private final CoreConfig config;
     private final Map<SpawnCategory, SpawnCategoryConfig> spawnCategoriesConfig;
 
-    EntitySpawnConfig(Map<SpawnCategory, SpawnCategoryConfig> spawnCategoriesConfig) {
+    EntitySpawnConfig(CoreConfig config, Map<SpawnCategory, SpawnCategoryConfig> spawnCategoriesConfig) {
+        this.config = config;
         this.spawnCategoriesConfig = spawnCategoriesConfig;
     }
 
     public SpawnCategoryConfig getSpawnCategoryConfig(SpawnCategory spawnCategory) {
         return spawnCategoriesConfig.computeIfAbsent(spawnCategory,
-                computeSpawnCategory -> new SpawnCategoryConfig(computeSpawnCategory, new MemoryConfiguration()));
+                computeSpawnCategory -> new SpawnCategoryConfig(
+                        config,
+                        computeSpawnCategory,
+                        new MemoryConfiguration()
+                ));
     }
 
     public boolean shouldAllowSpawn(Entity entity) {
@@ -31,8 +38,9 @@ public final class EntitySpawnConfig {
     }
 
     public void applyConfigToWorld() {
-        spawnCategoriesConfig.values()
-                .forEach(SpawnCategoryConfig::applyConfigToWorld);
+        for (SpawnCategory category : SpawnCategory.values()) {
+            getSpawnCategoryConfig(category).applyConfigToWorld();
+        }
     }
 
     @Override
@@ -46,23 +54,27 @@ public final class EntitySpawnConfig {
     public ConfigurationSection toSection() {
         MemoryConfiguration section = new MemoryConfiguration();
         spawnCategoriesConfig.forEach((spawnCategory, spawnCategoryConfig) -> {
-            section.set(spawnCategory.toString().toLowerCase(), spawnCategoryConfig.saveSection());
+            section.set(spawnCategory.toString().toLowerCase(Locale.ENGLISH), spawnCategoryConfig.saveSection());
         });
         return section;
     }
 
     @ApiStatus.Internal
-    public static EntitySpawnConfig fromSection(ConfigurationSection section) {
-        Map<SpawnCategory, SpawnCategoryConfig> spawnCategoriesConfig = new HashMap<>();
-        section.getValues(false).forEach((key, value) -> {
-            if (!(value instanceof ConfigurationSection sectionPart)) {
-                Logging.warning("Invalid spawn category config for " + key + ": " + value);
-                return;
+    public static EntitySpawnConfig fromSection(CoreConfig config, ConfigurationSection section) {
+        Map<SpawnCategory, SpawnCategoryConfig> spawnCategoriesConfig = new LinkedHashMap<>();
+        Map<String, Object> existingCategories = section.getValues(false);
+        for (SpawnCategory category : SpawnCategory.values()) {
+            Object value = existingCategories.get(category.toString().toLowerCase(Locale.ENGLISH));
+            if (!(value instanceof ConfigurationSection)) {
+                if (value != null) {
+                    Logging.warning("Invalid spawn category config for " + category + ": " + value);
+                }
+                value = section.createSection(category.toString());
             }
-            SpawnCategory spawnCategory = SpawnCategory.valueOf(key.toUpperCase());
-            spawnCategoriesConfig.put(spawnCategory, new SpawnCategoryConfig(spawnCategory, sectionPart));
-        });
-        return new EntitySpawnConfig(spawnCategoriesConfig);
+            ConfigurationSection sectionPart = (ConfigurationSection) value;
+            spawnCategoriesConfig.put(category, new SpawnCategoryConfig(config, category, sectionPart));
+        }
+        return new EntitySpawnConfig(config, spawnCategoriesConfig);
     }
 
     @ApiStatus.Internal

src/main/java/org/mvplugins/multiverse/core/world/entity/SpawnCategoryConfig.java

@@ -2,17 +2,20 @@ package org.mvplugins.multiverse.core.world.entity;
 
 import com.dumptruckman.minecraft.util.Logging;
 import io.vavr.control.Try;
+import org.bukkit.ChatColor;
 import org.bukkit.World;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.EntityType;
 import org.bukkit.entity.SpawnCategory;
+import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.config.handle.MemoryConfigurationHandle;
 import org.mvplugins.multiverse.core.config.handle.StringPropertyHandle;
 import org.mvplugins.multiverse.core.config.node.ConfigNode;
 import org.mvplugins.multiverse.core.config.node.ListConfigNode;
 import org.mvplugins.multiverse.core.config.node.Node;
 import org.mvplugins.multiverse.core.config.node.NodeGroup;
+import org.mvplugins.multiverse.core.config.node.serializer.NodeSerializer;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 import org.mvplugins.multiverse.core.world.MultiverseWorld;
 
@@ -21,6 +24,7 @@ import java.util.List;
 
 public final class SpawnCategoryConfig {
 
+    private final CoreConfig config;
     private final SpawnCategory spawnCategory;
     private final MemoryConfigurationHandle handle;
     private final StringPropertyHandle stringPropertyHandle;
@@ -28,7 +32,8 @@ public final class SpawnCategoryConfig {
 
     private MultiverseWorld world;
 
-    SpawnCategoryConfig(SpawnCategory spawnCategory, ConfigurationSection section) {
+    SpawnCategoryConfig(CoreConfig config, SpawnCategory spawnCategory, ConfigurationSection section) {
+        this.config = config;
         this.spawnCategory = spawnCategory;
         this.nodes = new Nodes();
         this.handle = MemoryConfigurationHandle.builder(section, nodes.nodes)
@@ -57,23 +62,42 @@ public final class SpawnCategoryConfig {
             return;
         }
         loadedWorld.getBukkitWorld().peek(bukkitWorld -> {
-            if (!isSpawn()) {
-                if (getExceptions().isEmpty()) {
-                    Logging.finer("World %s %s setTicksPerSpawns: 0", world.getName(), spawnCategory);
-                    bukkitWorld.setTicksPerSpawns(spawnCategory, 0);
-                } else {
-                    Logging.finer("World %s %s setTicksPerSpawns: -1", world.getName(), spawnCategory);
-                    bukkitWorld.setTicksPerSpawns(spawnCategory, -1);
-                }
-            } else {
-                Logging.finer("World %s %s setTicksPerSpawns: %d", world.getName(), spawnCategory, getTickRate());
-                bukkitWorld.setTicksPerSpawns(spawnCategory, getTickRate());
-            }
-            Logging.finer("World %s %s setSpawnLimit: %d", world.getName(), spawnCategory, getSpawnLimit());
-            bukkitWorld.setSpawnLimit(spawnCategory, getSpawnLimit());
+            applyTickPerSpawns(bukkitWorld);
+            applySpawnLimit(bukkitWorld);
         });
     }
 
+    private void applyTickPerSpawns(World bukkitWorld) {
+        if (!config.getApplyEntitySpawnLimit()) {
+            Logging.finer("World %s %s skipping setTicksPerSpawns due to core config", world.getName(), spawnCategory);
+            return;
+        }
+        if (!isSpawn() && getExceptions().isEmpty()) {
+            Logging.finer("World %s %s setTicksPerSpawns: 0", world.getName(), spawnCategory);
+            bukkitWorld.setTicksPerSpawns(spawnCategory, 0);
+            return;
+        }
+        if (getTickRate() == -2) {
+            Logging.finer("World %s %s skipping setTicksPerSpawns as tick-rate is UNSET", world.getName(), spawnCategory);
+            return;
+        }
+        Logging.finer("World %s %s setTicksPerSpawns: %d", world.getName(), spawnCategory, getTickRate());
+        bukkitWorld.setTicksPerSpawns(spawnCategory, getTickRate());
+    }
+
+    private void applySpawnLimit(World bukkitWorld) {
+        if (!config.getApplyEntitySpawnLimit()) {
+            Logging.finer("Skipping World %s %s setSpawnLimit due to core config", world.getName(), spawnCategory);
+            return;
+        }
+        if (getSpawnLimit() == -2) {
+            Logging.finer("World %s %s skipping setSpawnLimit as spawn-limit is UNSET", world.getName(), spawnCategory);
+            return;
+        }
+        Logging.finer("World %s %s setSpawnLimit: %d", world.getName(), spawnCategory, getSpawnLimit());
+        bukkitWorld.setSpawnLimit(spawnCategory, getSpawnLimit());
+    }
+
     public StringPropertyHandle getStringPropertyHandle() {
         return stringPropertyHandle;
     }
@@ -142,19 +166,39 @@ public final class SpawnCategoryConfig {
 
         final ConfigNode<Boolean> spawn = node(ConfigNode.builder("spawn", Boolean.class)
                 .defaultValue(true)
-                .onSetValue((oldValue, newValue) -> applyConfigToWorld())
+                .onLoadAndChange((oldValue, newValue) -> applyConfigToWorld())
                 .build());
 
         final ConfigNode<Integer> tickRate = node(ConfigNode.builder("tick-rate", Integer.class)
-                .defaultValue(-1)
-                .suggester(input -> List.of("-1", "10", "100", "400", "1000"))
-                .onSetValue((oldValue, newValue) -> applyConfigToWorld())
+                .defaultValue(-2)
+                .suggester(input -> List.of("@unset", "@bukkit", "10", "100", "400", "1000"))
+                .serializer(SpawnValueSerializer.INSTANCE)
+                .onLoadAndChange((oldValue, newValue) -> applyConfigToWorld())
+                .onChange((sender, oldValue, newValue) -> {
+                    if (!config.getApplyEntitySpawnRate()) {
+                        sender.sendMessage(ChatColor.RED + "Warning: Changing tick rates has no effect because " +
+                                "'apply-entity-spawn-rate' is disabled in the core config.");
+                    } else if (newValue == -2) {
+                        sender.sendMessage(ChatColor.YELLOW + "Note: Setting tick-rate to '@unset' may not reset to " +
+                                "the server default until the world is reloaded or server is restarted.");
+                    }
+                })
                 .build());
 
         final ConfigNode<Integer> spawnLimit = node(ConfigNode.builder("spawn-limit", Integer.class)
-                .defaultValue(-1)
-                .suggester(input -> List.of("-1", "10", "100", "400", "1000"))
-                .onSetValue((oldValue, newValue) -> applyConfigToWorld())
+                .defaultValue(-2)
+                .suggester(input -> List.of("@unset", "@bukkit", "10", "100", "400", "1000"))
+                .serializer(SpawnValueSerializer.INSTANCE)
+                .onLoadAndChange((oldValue, newValue) -> applyConfigToWorld())
+                .onChange((sender, oldValue, newValue) -> {
+                    if (!config.getApplyEntitySpawnLimit()) {
+                        sender.sendMessage(ChatColor.RED + "Warning: Changing spawn limits has no effect because " +
+                                "'apply-entity-spawn-limit' is disabled in the core config.");
+                    } else if (newValue == -2) {
+                        sender.sendMessage(ChatColor.YELLOW + "Note: Setting spawn-limit to '@unset' may not reset to " +
+                                "the server default until the world is reloaded or server is restarted.");
+                    }
+                })
                 .build());
 
         final ListConfigNode<EntityType> exceptions = node(ListConfigNode.listBuilder("exceptions", EntityType.class)
@@ -162,7 +206,32 @@ public final class SpawnCategoryConfig {
                 .itemSuggester(input -> SpawnCategoryMapper.getEntityTypes(spawnCategory).stream()
                         .map(EntityType::name)
                         .toList())
-                .onSetValue((oldValue, newValue) -> applyConfigToWorld())
+                .onLoadAndChange((oldValue, newValue) -> applyConfigToWorld())
                 .build());
     }
+
+    private static class SpawnValueSerializer implements NodeSerializer<Integer> {
+        private static final SpawnValueSerializer INSTANCE = new SpawnValueSerializer();
+
+        @Override
+        public Integer deserialize(Object object, Class<Integer> type) {
+            String str = String.valueOf(object);
+            if (str.equalsIgnoreCase("@unset")) {
+                return -2;
+            }
+            if (str.equalsIgnoreCase("@bukkit")) {
+                return -1;
+            }
+            return Integer.parseInt(str);
+        }
+
+        @Override
+        public Object serialize(Integer object, Class<Integer> type) {
+            return switch (object) {
+                case -2 -> "@unset";
+                case -1 -> "@bukkit";
+                default -> object;
+            };
+        }
+    }
 }

src/main/java/org/mvplugins/multiverse/core/world/generators/GeneratorProvider.java

@@ -27,6 +27,7 @@ import org.jetbrains.annotations.Nullable;
 import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.MultiverseCore;
+import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.utils.FileUtils;
 import org.mvplugins.multiverse.core.utils.REPatterns;
 
@@ -38,15 +39,17 @@ import org.mvplugins.multiverse.core.utils.REPatterns;
 public final class GeneratorProvider implements Listener {
     private final Map<String, String> defaultGenerators;
     private final Map<String, GeneratorPlugin> generatorPlugins;
+    private final CoreConfig coreConfig;
     private final FileUtils fileUtils;
 
     @Inject
-    GeneratorProvider(@NotNull MultiverseCore multiverseCore, @NotNull FileUtils fileUtils) {
+    GeneratorProvider(@NotNull MultiverseCore plugin, @NotNull CoreConfig coreConfig, @NotNull FileUtils fileUtils) {
+        this.coreConfig = coreConfig;
         this.fileUtils = fileUtils;
         defaultGenerators = new HashMap<>();
         generatorPlugins = new HashMap<>();
 
-        Bukkit.getPluginManager().registerEvents(this, multiverseCore);
+        Bukkit.getPluginManager().registerEvents(this, plugin);
         loadDefaultWorldGenerators();
         loadPluginGenerators();
     }
@@ -73,11 +76,14 @@ public final class GeneratorProvider implements Listener {
      * Find generator plugins from plugins loaded and register them.
      */
     private void loadPluginGenerators() {
-        Arrays.stream(Bukkit.getPluginManager().getPlugins()).forEach(plugin -> {
+        if (!coreConfig.getAutoDetectGeneratorPlugins()) {
+            return;
+        }
+        for (Plugin plugin : Bukkit.getPluginManager().getPlugins()) {
             if (testIsGeneratorPlugin(plugin)) {
                 registerGeneratorPlugin(new SimpleGeneratorPlugin(plugin.getName()));
             }
-        });
+        }
     }
 
     /**
@@ -88,14 +94,23 @@ public final class GeneratorProvider implements Listener {
      */
     private boolean testIsGeneratorPlugin(Plugin plugin) {
         String worldName = Bukkit.getWorlds().stream().findFirst().map(World::getName).orElse("world");
-        return Try.of(() -> plugin.getDefaultWorldGenerator(worldName, "") != null)
-                .recover(IllegalArgumentException.class, true)
-                .recover(throwable -> {
-                    Logging.warning("Plugin %s threw an exception when testing if it is a generator plugin!",
-                            plugin.getName());
-                    throwable.printStackTrace();
-                    return false;
-                }).getOrElse(false);
+        try {
+            return plugin.getDefaultWorldGenerator(worldName, "") != null;
+        } catch (UnsupportedOperationException e) {
+            // Some plugins throw this if they don't support world generation
+            return false;
+        } catch (Throwable t) {
+            Logging.warning("Plugin %s threw an exception when testing if it is a generator plugin! ",
+                    plugin.getName());
+            Logging.warning("Error by plugin %s: %s", plugin.getName(), t.getMessage());
+            Logging.warning("This is NOT a bug in Multiverse. Do NOT report this to Multiverse support. " +
+                    "Enable debug mode with `/mv debug 1` to see the full stack trace.");
+            if (coreConfig.getGlobalDebug() >= 1) {
+                t.printStackTrace();
+            }
+            // Assume it's a generator plugin since it tried to do something, most likely the id is wrong.
+            return true;
+        }
     }
 
     /**
@@ -206,6 +221,9 @@ public final class GeneratorProvider implements Listener {
      */
     @EventHandler
     private void onPluginEnable(PluginEnableEvent event) {
+        if (!coreConfig.getAutoDetectGeneratorPlugins()) {
+            return;
+        }
         if (!testIsGeneratorPlugin(event.getPlugin())) {
             Logging.finest("Plugin %s is not a generator plugin.", event.getPlugin().getName());
             return;

src/main/java/org/mvplugins/multiverse/core/world/helpers/ConcurrentPlayerWorldTracker.java

@@ -0,0 +1,90 @@
+package org.mvplugins.multiverse.core.world.helpers;
+
+import io.vavr.control.Option;
+import jakarta.inject.Inject;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.UnmodifiableView;
+import org.jvnet.hk2.annotations.Service;
+import org.mvplugins.multiverse.core.MultiverseCore;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Tracks which players are in which worlds, using a thread-safe map.
+ * This allows async access to online players list and the world they are in.
+ *
+ * @since 5.4
+ */
+@ApiStatus.AvailableSince("5.4")
+@Service
+public final class ConcurrentPlayerWorldTracker implements Listener {
+
+    private final Map<String, String> playerWorldMap;
+
+    @Inject
+    ConcurrentPlayerWorldTracker(@NotNull MultiverseCore plugin) {
+        this.playerWorldMap = new ConcurrentHashMap<>();
+        plugin.getServer().getPluginManager().registerEvents(this, plugin);
+    }
+
+    /**
+     * Get an unmodifiable collection of all online player names on the server.
+     *
+     * @return Unmodifiable collection of online player names.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    @NotNull
+    @UnmodifiableView
+    public Collection<String> getOnlinePlayers() {
+        return Collections.unmodifiableCollection(playerWorldMap.keySet());
+    }
+
+    /**
+     * Get the world name a player is currently in.
+     *
+     * @param playerName Name of the player.
+     * @return World name the player is in, or null if the player is not online.
+     *
+     * @since 5.4
+     */
+    @ApiStatus.AvailableSince("5.4")
+    @NotNull
+    public Option<String> getPlayerWorld(String playerName) {
+        return Option.of(playerWorldMap.get(playerName));
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST)
+    private void onPlayerJoin(PlayerJoinEvent event) {
+        setPlayerWorld(event.getPlayer());
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST)
+    private void onPlayerChangedWorld(@NotNull PlayerChangedWorldEvent event) {
+        setPlayerWorld(event.getPlayer());
+    }
+
+    private void setPlayerWorld(Player player) {
+        String playerName = player.getName();
+        String worldName = player.getWorld().getName();
+        playerWorldMap.put(playerName, worldName);
+    }
+
+    @EventHandler
+    private void onPlayerQuit(@NotNull PlayerQuitEvent event) {
+        String playerName = event.getPlayer().getName();
+        playerWorldMap.remove(playerName);
+    }
+}

src/main/java/org/mvplugins/multiverse/core/world/helpers/WorldNameChecker.java

@@ -1,14 +1,15 @@
 package org.mvplugins.multiverse.core.world.helpers;
 
 import java.io.File;
+import java.util.Locale;
 import java.util.Set;
-import java.util.regex.Pattern;
 
 import io.vavr.control.Option;
 import org.bukkit.Bukkit;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jvnet.hk2.annotations.Service;
+import org.mvplugins.multiverse.core.utils.REPatterns;
 
 /**
  * <p>Utility class in helping to check the status of a world name and it's associated world folder.</p>
@@ -19,11 +20,11 @@ import org.jvnet.hk2.annotations.Service;
 @Service
 public final class WorldNameChecker {
 
-    private static final Pattern WORLD_NAME_PATTERN = Pattern.compile("[a-zA-Z0-9/._-]+");
     private static final Set<String> BLACKLIST_NAMES = Set.of(
             "cache",
             "config",
             "crash-reports",
+            "libraries",
             "logs",
             "plugins",
             "versions");
@@ -46,18 +47,21 @@ public final class WorldNameChecker {
      */
     @NotNull
     public NameStatus checkName(@Nullable String worldName) {
-        return Option.of(worldName).map(name -> {
-            if (name.isEmpty()) {
-                return NameStatus.EMPTY;
-            }
-            if (BLACKLIST_NAMES.contains(name)) {
-                return NameStatus.BLACKLISTED;
-            }
-            if (!WORLD_NAME_PATTERN.matcher(name).matches()) {
-                return NameStatus.INVALID_CHARS;
-            }
-            return NameStatus.VALID;
-        }).getOrElse(NameStatus.EMPTY);
+        return Option.of(worldName)
+                .map(name -> name.toLowerCase(Locale.ENGLISH))
+                .map(name -> {
+                    if (name.isEmpty()) {
+                        return NameStatus.EMPTY;
+                    }
+                    if (BLACKLIST_NAMES.contains(name)) {
+                        return NameStatus.BLACKLISTED;
+                    }
+                    if (!REPatterns.NAMESPACE_KEY.matcher(name).matches()) {
+                        return NameStatus.INVALID_CHARS;
+                    }
+                    return NameStatus.VALID;
+                })
+                .getOrElse(NameStatus.EMPTY);
     }
 
     /**
@@ -130,7 +134,7 @@ public final class WorldNameChecker {
      * @return True if it looks like a world, else false.
      */
     private boolean folderHasDat(@NotNull File worldFolder) {
-        File[] files = worldFolder.listFiles((file, name) -> name.toLowerCase().endsWith(".dat"));
+        File[] files = worldFolder.listFiles((file, name) -> name.toLowerCase(Locale.ENGLISH).endsWith(".dat"));
         return files != null && files.length > 0;
     }