Merge pull request #3524 from Multiverse/chore/ignore-kolin

Add Kolin build cache folder to gitignore

.github/workflows/generic.artifact_comment.yml

@@ -0,0 +1,77 @@
+name: 'Generic: Artifact Comment'
+
+on:
+  workflow_call:
+    inputs:
+      plugin_name:
+        description: 'Plugin name used by Generic: Test'
+        required: true
+        type: string
+
+jobs:
+  comment-artifact:
+    if: >-
+      github.event_name == 'workflow_run' &&
+      github.event.workflow_run.event == 'pull_request' &&
+      github.event.workflow_run.conclusion == 'success'
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      pull-requests: write
+    steps:
+      # Run separately so fork builds can post comments without a write token.
+      # Do not check out or execute code from the pull request in this workflow.
+      - name: Find pull request and artifact
+        id: artifact
+        uses: actions/github-script@v7
+        env:
+          PLUGIN_NAME: ${{ inputs.plugin_name }}
+        with:
+          script: |
+            const run = context.payload.workflow_run;
+            // Fork runs can have an empty pull_requests array in the event.
+            const pulls = await github.paginate(github.rest.pulls.list, {
+              ...context.repo,
+              state: 'open',
+              head: `${run.head_repository.owner.login}:${run.head_branch}`,
+              per_page: 100,
+            });
+            const pull = pulls.find(pr =>
+              pr.head.repo?.id === run.head_repository.id &&
+              pr.head.ref === run.head_branch &&
+              pr.head.sha === run.head_sha
+            );
+            if (!pull) {
+              core.info('No open pull request matches this build; skipping comment.');
+              return;
+            }
+
+            const artifacts = await github.paginate(github.rest.actions.listWorkflowRunArtifacts, {
+              ...context.repo,
+              run_id: run.id,
+              per_page: 100,
+            });
+            const artifact = artifacts.find(item =>
+              item.name === `${process.env.PLUGIN_NAME}-pr${pull.number}` && !item.expired
+            );
+            if (!artifact) {
+              core.info('No build artifact is available; skipping comment.');
+              return;
+            }
+
+            core.setOutput('number', pull.number);
+            core.setOutput('url', `${run.html_url}/artifacts/${artifact.id}`);
+
+      - name: Comment artifact
+        if: steps.artifact.outputs.number != ''
+        uses: marocchino/sticky-pull-request-comment@v3
+        with:
+          number: ${{ steps.artifact.outputs.number }}
+          header: build-artifact-${{ inputs.plugin_name }}
+          message: |
+            ### ✅ `${{ inputs.plugin_name }}` test build ready
+
+            Last updated for: [${{ github.event.workflow_run.head_sha }}](${{ github.server_url }}/${{ github.repository }}/commit/${{ github.event.workflow_run.head_sha }})
+            **Download:** [${{ inputs.plugin_name }}-pr${{ steps.artifact.outputs.number }}.zip](${{ steps.artifact.outputs.url }})
+
+            View [CI build and checks](${{ github.event.workflow_run.html_url }}) for more details.

.github/workflows/generic.platform_uploads.yml

@@ -107,7 +107,7 @@ 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: 1.21.11, 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
+        game_versions: 26.3, 26.2, 26.1.2, 26.1.1, 26.1, 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, purpur
         dependencies: ${{ inputs.modrinth_dependencies }}
@@ -121,7 +121,7 @@ jobs:
         changelog: ${{ steps.release-artifact.outputs.body }}
         changelog_type: markdown
         display_name: ${{ steps.release-info.outputs.tag_name }}
-        game_versions: 1.21.11, 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
+        game_versions: 26.3, 26.2, 26.1.2, 26.1.1, 26.1, 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": ["1.18.2-1.21.11"]}'
+        platform_dependencies: '{"PAPER": ["1.18.2-26.3"]}'
         plugin_dependencies: ${{ inputs.hangar_plugin_dependencies }}

.github/workflows/generic.test.yml

@@ -36,13 +36,3 @@ jobs:
         with:
           name: ${{ inputs.plugin_name }}-pr${{ github.event.pull_request.number }}
           path: build/libs/${{ inputs.plugin_name }}-pr${{ github.event.pull_request.number }}.jar
-
-  comment-artifact:
-    needs: test-and-artifact
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-    steps:
-      - uses: benwoo1110/artifact-comment-action@v1
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pr.artifact_comment.yml

@@ -0,0 +1,15 @@
+name: 'PR: Artifact Comment'
+
+on:
+  workflow_run:
+    workflows: ['PR: Test']
+    types: [completed]
+
+jobs:
+  comment-artifact:
+    permissions:
+      actions: read
+      pull-requests: write
+    uses: ./.github/workflows/generic.artifact_comment.yml
+    with:
+      plugin_name: multiverse-core

.gitignore

@@ -46,3 +46,6 @@ debug.txt
 
 # Gradle
 .gradle
+
+# Kotlin generated files
+/.kotlin/

build.gradle

@@ -9,13 +9,13 @@ description = 'Multiverse-Core'
 
 repositories {
     maven {
-        name = 'aikar repo'
-        url = uri('https://repo.aikar.co/content/groups/aikar/')
+        name = 'jitpack repo'
+        url = uri('https://jitpack.io')
     }
 
     maven {
-        name = 'glaremasters repo'
-        url = 'https://repo.glaremasters.me/repository/towny/'
+        name = 'aikar repo'
+        url = uri('https://repo.aikar.co/content/groups/aikar/')
     }
 
     maven {
@@ -27,7 +27,7 @@ repositories {
 configure(apiDependencies) {
     serverApiVersion = '1.21.11-R0.1-SNAPSHOT'
     mockBukkitServerApiVersion = '1.21'
-    mockBukkitVersion = '4.100.0'
+    mockBukkitVersion = '4.110.0'
 }
 
 dependencies {
@@ -37,18 +37,18 @@ dependencies {
     }
 
     // PlaceholderAPI
-    externalPlugin 'me.clip:placeholderapi:2.11.6'
+    externalPlugin 'me.clip:placeholderapi:2.12.3'
 
     // Command Framework
     shadowed 'co.aikar:acf-paper:0.5.1-SNAPSHOT'
 
     // Config
-    shadowed('io.github.townyadvanced.commentedconfiguration:CommentedConfiguration:1.0.1') {
+    shadowed('com.github.TownyAdvanced:CommentedConfiguration:1.0.3') {
         exclude group: 'org.spigotmc', module: 'spigot-api'
     }
 
     // Utils
-    shadowed 'io.vavr:vavr:0.10.7'
+    shadowed 'io.vavr:vavr:1.0.1'
     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'
@@ -57,11 +57,11 @@ dependencies {
         exclude group: 'junit', module: 'junit'
     }
     shadowed 'de.themoep.idconverter:mappings:1.2-SNAPSHOT'
-    shadowed('org.bstats:bstats-bukkit:3.1.0') {
+    shadowed('org.bstats:bstats-bukkit:3.2.1') {
         exclude group: 'org.bukkit', module: 'bukkit'
     }
-    shadowed 'net.minidev:json-smart:2.5.2'
-    shadowed 'org.jetbrains:annotations:26.0.2'
+    shadowed 'net.minidev:json-smart:2.6.0'
+    shadowed 'org.jetbrains:annotations:26.1.0'
     shadowed 'io.papermc:paperlib:1.0.8'
 
     // Tests

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

@@ -30,6 +30,7 @@ import org.mvplugins.multiverse.core.inject.PluginServiceLocatorFactory;
 import org.mvplugins.multiverse.core.module.MultiverseModule;
 import org.mvplugins.multiverse.core.utils.StringFormatter;
 import org.mvplugins.multiverse.core.world.WorldManager;
+import org.mvplugins.multiverse.core.world.entity.SpawnCategoryMapper;
 import org.mvplugins.multiverse.core.world.location.NullSpawnLocation;
 import org.mvplugins.multiverse.core.world.location.SpawnLocation;
 import org.mvplugins.multiverse.core.world.location.UnloadedWorldLocation;
@@ -97,12 +98,16 @@ public class MultiverseCore extends MultiverseModule {
         }
         Logging.setShowingConfig(shouldShowConfig());
 
+        // Build it here so our logger can work, and failure messages will be logged
+        SpawnCategoryMapper.buildSpawnCategoryMap();
+
         // Initialize the worlds
-        worldManagerProvider.get().initAllWorlds().andThenTry(() -> {
+        Try.run(() -> {
+            setUpLocales();
+            worldManagerProvider.get().initAllWorlds();
             loadEconomist(); // Setup economy here so vault is loaded
             loadAnchors();
             registerDynamicListeners(CoreListener.class);
-            setUpLocales();
             registerCommands(CoreCommand.class);
             registerDestinations();
             setupMetrics();
@@ -226,11 +231,12 @@ public class MultiverseCore extends MultiverseModule {
      * Logs the enable message.
      */
     private void logEnableMessage() {
-        Logging.config("\u001B[32mVersion %s (API v%s) Enabled - By %s\u001B[39m",
+        Logging.config("\u001B[32mVersion %s (API v%s) Enabled - By %s\u001B[0m",
                 this.getDescription().getVersion(), getVersionAsNumber(), StringFormatter.joinAnd(getDescription().getAuthors()));
 
         if (configProvider.get().isShowingDonateMessage()) {
-            Logging.config("\u001B[32mLoving Multiverse-Core? Please consider supporting the project with a small donation: https://github.com/sponsors/Multiverse\u001B[39m");
+            Logging.config("\u001B[32mLoving Multiverse-Core? Please consider supporting the project with a " +
+                    "small donation: https://github.com/sponsors/Multiverse\u001B[0m");
         }
     }
 

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

@@ -1,9 +1,17 @@
 package org.mvplugins.multiverse.core;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+import com.dumptruckman.minecraft.util.Logging;
+import io.vavr.control.Try;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.ServicePriority;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
+
 import org.mvplugins.multiverse.core.anchor.AnchorManager;
 import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.destination.DestinationsProvider;
@@ -16,18 +24,13 @@ import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.biomeprovider.BiomeProviderFactory;
 import org.mvplugins.multiverse.core.world.generators.GeneratorProvider;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Objects;
-import java.util.function.Consumer;
-
 /**
  * Provides access to the MultiverseCore API.
  */
-public class MultiverseCoreApi {
+public final class MultiverseCoreApi {
 
     private static MultiverseCoreApi instance;
-    private static final List<Consumer<MultiverseCoreApi>> whenLoadedCallbacks = new ArrayList<>();
+    private static final List<Consumer<MultiverseCoreApi>> WHEN_LOADED_CALLBACKS = new ArrayList<>();
 
     static void init(@NotNull MultiverseCore multiverseCore) {
         if (instance != null) {
@@ -36,11 +39,24 @@ public class MultiverseCoreApi {
         instance = new MultiverseCoreApi(multiverseCore.getServiceLocator());
         Bukkit.getServicesManager().register(MultiverseCoreApi.class, instance, multiverseCore, ServicePriority.Normal);
 
-        whenLoadedCallbacks.forEach(c -> c.accept(instance));
-        whenLoadedCallbacks.clear();
+        List<Consumer<MultiverseCoreApi>> callbacks = List.copyOf(WHEN_LOADED_CALLBACKS);
+        WHEN_LOADED_CALLBACKS.clear();
+        MultiverseCoreApi loadedApi = instance;
+        callbacks.forEach(callback -> runLoadCallback(callback, loadedApi));
+    }
+
+    private static void runLoadCallback(
+            @NotNull Consumer<MultiverseCoreApi> callback,
+            @NotNull MultiverseCoreApi loadedApi) {
+        Try.run(() -> callback.accept(loadedApi))
+                .onFailure(exception -> Logging.warning(
+                        "A Multiverse-Core API load callback failed: %s", exception.getMessage()));
     }
 
     static void shutdown() {
+        if (instance == null) {
+            return;
+        }
         Bukkit.getServicesManager().unregister(instance);
         instance = null;
     }
@@ -62,7 +78,7 @@ public class MultiverseCoreApi {
         if (instance != null) {
             consumer.accept(instance);
         } else {
-            whenLoadedCallbacks.add(consumer);
+            WHEN_LOADED_CALLBACKS.add(consumer);
         }
     }
 

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

@@ -87,7 +87,8 @@ final class PlaceholderExpansionHook extends PlaceholderExpansion {
     @Override
     public @Nullable String onRequest(OfflinePlayer offlinePlayer, @NotNull String params) {
         // Split string in to an Array with underscores
-        List<String> paramsArray = Lists.newArrayList(REPatterns.UNDERSCORE.split(params));
+        List<String> paramsArray = Lists.newArrayList(
+                StringFormatter.parseQuotesInArgs(REPatterns.UNDERSCORE.split(params), "_"));
 
         // No placeholder defined
         if (paramsArray.isEmpty()) {
@@ -151,6 +152,19 @@ final class PlaceholderExpansionHook extends PlaceholderExpansion {
             case "generator" -> world.getGenerator();
             case "hunger" -> String.valueOf(world.isHunger());
             case "isloaded" -> String.valueOf(world.isLoaded());
+            case "key" -> String.valueOf(world.getKey());
+            case "meta" -> {
+                if (placeholderParams.isEmpty()) {
+                    warning("No meta key specified.");
+                    yield null;
+                }
+                String metaKey = String.join("_", placeholderParams);
+                yield world.getMeta(metaKey)
+                        .getOrElse(() -> {
+                            warning("Meta key '" + metaKey + "' not found for world '" + world.getName() + "'.");
+                            return null;
+                        });
+            }
             case "monstersspawn" -> String.valueOf(world.getEntitySpawnConfig()
                     .getSpawnCategoryConfig(SpawnCategory.MONSTER)
                     .isSpawn());

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

@@ -0,0 +1,60 @@
+package org.mvplugins.multiverse.core.command;
+
+import co.aikar.commands.CommandCompletionContext;
+import co.aikar.commands.CommandCompletionFilter;
+import co.aikar.commands.apachecommonslang.ApacheCommonsLangUtil;
+import org.jetbrains.annotations.ApiStatus;
+
+import java.util.Locale;
+
+/**
+ * Utility filters for command completion matching.
+ *
+ * @since 5.7
+ */
+@ApiStatus.AvailableSince("5.7")
+public final class MVCommandCompletionFilters {
+
+    /**
+     * Matches namespaced keys (for example, {@code minecraft:stone}) using namespace-aware checks.
+     * <p>
+     * This filter accepts completions that:
+     * <ul>
+     *     <li>start with the current input,</li>
+     *     <li>have a namespace starting with the input, or</li>
+     *     <li>have a key value containing the input.</li>
+     * </ul>
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static final CommandCompletionFilter NAMESPACED_KEY = (context, completion) -> {
+        String[] split = completion.split(":", 2);
+        if (split.length < 2) {
+            return ApacheCommonsLangUtil.startsWithIgnoreCase(completion, context.getInput());
+        }
+        String lowerCase = context.getInput().toLowerCase(Locale.ROOT);
+        return ApacheCommonsLangUtil.startsWithIgnoreCase(completion, context.getInput())
+                || split[0].toLowerCase(Locale.ROOT).startsWith(lowerCase)
+                || split[1].toLowerCase(Locale.ROOT).contains(lowerCase);
+    };
+
+    /**
+     * Gets the namespaced-key completion filter with a generic type-safe signature.
+     * Use this method instead of {@link MVCommandCompletionFilters#NAMESPACED_KEY}
+     * to avoid raw type unchecked warnings.
+     *
+     * @param <C> completion context type
+     * @return the namespaced key filter
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static <C extends CommandCompletionContext> CommandCompletionFilter<C> namespacedKey() {
+        return NAMESPACED_KEY;
+    }
+
+    private MVCommandCompletionFilters() {
+        throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
+    }
+}

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

@@ -11,6 +11,7 @@ import java.util.Map;
 import java.util.stream.Collectors;
 
 import co.aikar.commands.BukkitCommandCompletionContext;
+import co.aikar.commands.CommandCompletionFilter;
 import co.aikar.commands.CommandIssuer;
 import co.aikar.commands.PaperCommandCompletions;
 import co.aikar.commands.RegisteredCommand;
@@ -52,6 +53,7 @@ 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 org.mvplugins.multiverse.core.world.helpers.PotentialWorldFinder;
 
 import static org.mvplugins.multiverse.core.utils.StringFormatter.addOnToCommaSeparated;
 
@@ -65,6 +67,7 @@ public class MVCommandCompletions extends PaperCommandCompletions {
     private final CorePermissionsChecker corePermissionsChecker;
     private final AnchorManager anchorManager;
     private final GeneratorProvider generatorProvider;
+    private final PotentialWorldFinder potentialWorldFinder;
 
     @Inject
     MVCommandCompletions(
@@ -74,7 +77,8 @@ public class MVCommandCompletions extends PaperCommandCompletions {
             @NotNull CoreConfig config,
             @NotNull CorePermissionsChecker corePermissionsChecker,
             @NotNull AnchorManager anchorManager,
-            @NotNull GeneratorProvider generatorProvider
+            @NotNull GeneratorProvider generatorProvider,
+            @NotNull PotentialWorldFinder potentialWorldFinder
     ) {
         super(mvCommandManager);
         this.commandManager = mvCommandManager;
@@ -84,27 +88,29 @@ public class MVCommandCompletions extends PaperCommandCompletions {
         this.corePermissionsChecker = corePermissionsChecker;
         this.anchorManager = anchorManager;
         this.generatorProvider = generatorProvider;
+        this.potentialWorldFinder = potentialWorldFinder;
 
-        registerAsyncCompletion("anchornames", this::suggestAnchorNames);
+        registerAsyncCompletion("anchornames", this::suggestAnchorNames, CommandCompletionFilter.contains());
         registerAsyncCompletion("commands", this::suggestCommands);
         registerAsyncCompletion("destinations", this::suggestDestinations);
         registerStaticCompletion("difficulties", suggestEnums(Difficulty.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);
+        registerStaticCompletion("gamerules", this::suggestGamerules, MVCommandCompletionFilters.namespacedKey());
         registerAsyncCompletion("gamerulesvalues", this::suggestGamerulesValues);
-        registerAsyncCompletion("generatorplugins", this::suggestGeneratorPlugins);
-        registerStaticCompletion("materials", suggestEnums(Material.class));
-        registerStaticCompletion("mvconfigs", config.getStringPropertyHandle().getAllPropertyNames());
+        registerAsyncCompletion("generatorplugins", this::suggestGeneratorPlugins, CommandCompletionFilter.contains());
+        registerStaticCompletion("materials", suggestEnums(Material.class), CommandCompletionFilter.contains());
+        registerStaticCompletion("mvconfigs", config.getStringPropertyHandle().getAllPropertyNames(), CommandCompletionFilter.contains());
         registerAsyncCompletion("mvconfigvalues", this::suggestMVConfigValues);
-        registerAsyncCompletion("mvworlds", this::suggestMVWorlds);
-        registerAsyncCompletion("mvworldpropsname", this::suggestMVWorldPropsName);
+        registerAsyncCompletion("mvworlds", this::suggestMVWorlds, MVCommandCompletionFilters.namespacedKey());
+        registerAsyncCompletion("mvworldmetakey", this::suggestMVWorldMetaKey, CommandCompletionFilter.contains());
+        registerAsyncCompletion("mvworldpropsname", this::suggestMVWorldPropsName, CommandCompletionFilter.contains());
         registerAsyncCompletion("mvworldpropsvalue", this::suggestMVWorldPropsValue);
-        registerCompletion("playersarray", this::suggestPlayersArray); // getting online players cannot be async
+        registerCompletion("playersarray", this::suggestPlayersArray, CommandCompletionFilter.contains()); // getting online players cannot be async
         registerStaticCompletion("propsmodifyaction", suggestEnums(PropertyModifyAction.class));
         registerStaticCompletion("spawncategories", suggestEnums(SpawnCategory.class));
-        registerAsyncCompletion("spawncategorypropsname", this::suggestSpawnCategoryPropsName);
+        registerAsyncCompletion("spawncategorypropsname", this::suggestSpawnCategoryPropsName, CommandCompletionFilter.contains());
         registerAsyncCompletion("spawncategorypropsvalue", this::suggestSpawnCategoryPropsValue);
 
         setDefaultCompletion("destinations", DestinationInstance.class);
@@ -297,13 +303,20 @@ public class MVCommandCompletions extends PaperCommandCompletions {
                         .toList();
             }
             case "potential" -> {
-                return worldManager.getPotentialWorlds();
+                return potentialWorldFinder.findPotentialWorlds();
             }
         }
         Logging.severe("Invalid MVWorld scope: " + scope);
         return Collections.emptyList();
     }
 
+    private Collection<String> suggestMVWorldMetaKey(BukkitCommandCompletionContext context) {
+        return Try.of(() -> context.getContextValue(MultiverseWorld.class))
+                .map(MultiverseWorld::getAllMeta)
+                .map(Map::keySet)
+                .getOrElse(Collections.emptySet());
+    }
+
     private Collection<String> suggestMVWorldPropsName(BukkitCommandCompletionContext context) {
         return Try.of(() -> {
             MultiverseWorld world = context.getContextValue(MultiverseWorldValue.class).value();

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

@@ -39,9 +39,12 @@ import org.mvplugins.multiverse.core.display.filters.ContentFilter;
 import org.mvplugins.multiverse.core.display.filters.DefaultContentFilter;
 import org.mvplugins.multiverse.core.display.filters.RegexContentFilter;
 import org.mvplugins.multiverse.core.exceptions.command.MVInvalidCommandArgument;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.utils.PlayerFinder;
 import org.mvplugins.multiverse.core.utils.REPatterns;
+import org.mvplugins.multiverse.core.utils.tick.TickDuration;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 import org.mvplugins.multiverse.core.world.MultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
@@ -93,6 +96,7 @@ public class MVCommandContexts extends PaperCommandContexts {
         registerIssuerAwareContext(PlayerArrayValue.class, playerArrayContextBuilder().generateContext(PlayerArrayValue::new));
         registerIssuerAwareContext(PlayerLocation.class, this::parsePlayerLocation);
         registerContext(SpawnCategory[].class, this::parseSpawnCategories);
+        registerContext(TickDuration.class, this::parseTickDuration);
     }
 
     private MVCommandIssuer parseMVCommandIssuer(BukkitCommandExecutionContext context) {
@@ -166,15 +170,67 @@ public class MVCommandContexts extends PaperCommandContexts {
         return generatorPlugin;
     }
 
+    private Message loadedMultiverseWorldPlayerOnlyMessage() {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_LOADEDMULTIVERSEWORLD_PLAYERSONLY);
+    }
+
+    private Message loadedMultiverseWorldIssuerMessage() {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_LOADEDMULTIVERSEWORLD_ISSUER);
+    }
+
+    private Message loadedMultiverseWorldInputConsoleMessage(String worldName) {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_LOADEDMULTIVERSEWORLD_INPUTCONSOLE,
+                Replace.WORLD.with(worldName));
+    }
+
+    private Message loadedMultiverseWorldInputMessage(String worldName) {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_LOADEDMULTIVERSEWORLD_INPUT, Replace.WORLD.with(worldName));
+    }
+
+    private Message multiverseWorldPlayerOnlyMessage() {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_MULTIVERSEWORLD_PLAYERSONLY);
+    }
+
+    private Message multiverseWorldIssuerMessage() {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_MULTIVERSEWORLD_ISSUER);
+    }
+
+    private Message multiverseWorldInputConsoleMessage(String worldName) {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_MULTIVERSEWORLD_INPUTCONSOLE, Replace.WORLD.with(worldName));
+    }
+
+    private Message multiverseWorldInputMessage(String worldName) {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_MULTIVERSEWORLD_INPUT, Replace.WORLD.with(worldName));
+    }
+
+    private Message playerOnlyMessage() {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_PLAYERSONLY);
+    }
+
+    private Message playerInputIssuerMessage(String playerName) {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_PLAYER_ISSUERINPUT, Replace.PLAYER.with(playerName));
+    }
+
+    private Message playerInputMessage(String playerName) {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_PLAYER_INPUT, Replace.PLAYER.with(playerName));
+    }
+
+    private Message playerSelectorMessage(String selector) {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_PLAYER_SELECTOR, Replace.PLAYER.with(selector));
+    }
+
+    private Message playersInputMessage(String playerName) {
+        return Message.of(MVCorei18n.COMMANDS_ERROR_PLAYERS_INPUT, Replace.PLAYER.with(playerName));
+    }
 
     private IssuerAwareContextBuilder<LoadedMultiverseWorld> loadedMultiverseWorldContextBuilder() {
         return new IssuerAwareContextBuilder<LoadedMultiverseWorld>()
                 .fromPlayer((context, player) -> worldManager.getLoadedWorld(player.getWorld()).getOrNull())
                 .fromInput((context, input) -> getLoadedMultiverseWorld(input))
-                .issuerOnlyFailMessage((context) -> Message.of("This command can only be used by a player in a loaded Multiverse World."))
-                .issuerAwarePlayerFailMessage((context, player) -> Message.of("You are not in a loaded multiverse world. Either specify a multiverse world name or use this command in a loaded multiverse world."))
-                .issuerAwareInputFailMessage((context, input) -> Message.of("World '" + input + "' is not a loaded multiverse world. Remember to specify the world name when using this command in console."))
-                .inputOnlyFailMessage((context, input) -> Message.of("World " + input + " is not a loaded multiverse world."));
+                .issuerOnlyFailMessage((context) -> loadedMultiverseWorldPlayerOnlyMessage())
+                .issuerAwarePlayerFailMessage((context, player) -> loadedMultiverseWorldIssuerMessage())
+                .issuerAwareInputFailMessage((context, input) -> loadedMultiverseWorldInputConsoleMessage(input))
+                .inputOnlyFailMessage((context, input) -> loadedMultiverseWorldInputMessage(input));
     }
 
     private IssuerAwareContextBuilder<LoadedMultiverseWorld[]> loadedMultiverseWorldArrayContextBuilder() {
@@ -192,16 +248,17 @@ public class MVCommandContexts extends PaperCommandContexts {
                         }
                         LoadedMultiverseWorld world = getLoadedMultiverseWorld(worldName);
                         if (world == null) {
-                            throw new InvalidCommandArgument("World " + worldName + " is not a loaded multiverse world.");
+                            throw new InvalidCommandArgument(
+                                    loadedMultiverseWorldInputMessage(worldName).formatted(context.getIssuer()));
                         }
                         worlds.add(world);
                     }
                     return worlds.isEmpty() ? null : worlds.toArray(new LoadedMultiverseWorld[0]);
                 })
-                .issuerOnlyFailMessage((context) -> Message.of("This command can only be used by a player in a loaded Multiverse World."))
-                .issuerAwarePlayerFailMessage((context, player) -> Message.of("You are not in a loaded multiverse world. Either specify a multiverse world name or use this command in a loaded multiverse world."))
-                .issuerAwareInputFailMessage((context, input) -> Message.of("World '" + input + "' is not a loaded multiverse world. Remember to specify the world name when using this command in console."))
-                .inputOnlyFailMessage((context, input) -> Message.of("World " + input + " is not a loaded multiverse world."));
+                .issuerOnlyFailMessage((context) -> loadedMultiverseWorldPlayerOnlyMessage())
+                .issuerAwarePlayerFailMessage((context, player) -> loadedMultiverseWorldIssuerMessage())
+                .issuerAwareInputFailMessage((context, input) -> loadedMultiverseWorldInputConsoleMessage(input))
+                .inputOnlyFailMessage((context, input) -> loadedMultiverseWorldInputMessage(input));
     }
 
     @Nullable
@@ -215,10 +272,10 @@ public class MVCommandContexts extends PaperCommandContexts {
         return new IssuerAwareContextBuilder<MultiverseWorld>()
                 .fromPlayer((context, player) -> worldManager.getWorld(player.getWorld()).getOrNull())
                 .fromInput((context, input) -> getMultiverseWorld(input))
-                .issuerOnlyFailMessage((context) -> Message.of("This command can only be used by a player in a Multiverse World."))
-                .issuerAwarePlayerFailMessage((context, player) -> Message.of("You are not in a multiverse world. Either specify a multiverse world name or use this command in a multiverse world."))
-                .issuerAwareInputFailMessage((context, input) -> Message.of("World '" + input + "' is not a multiverse world. Remember to specify the world name when using this command in console."))
-                .inputOnlyFailMessage((context, input) -> Message.of("World " + input + " is not a multiverse world."));
+                .issuerOnlyFailMessage((context) -> multiverseWorldPlayerOnlyMessage())
+                .issuerAwarePlayerFailMessage((context, player) -> multiverseWorldIssuerMessage())
+                .issuerAwareInputFailMessage((context, input) -> multiverseWorldInputConsoleMessage(input))
+                .inputOnlyFailMessage((context, input) -> multiverseWorldInputMessage(input));
     }
 
     private IssuerAwareContextBuilder<MultiverseWorld[]> multiverseWorldArrayContextBuilder() {
@@ -236,16 +293,17 @@ public class MVCommandContexts extends PaperCommandContexts {
                         }
                         MultiverseWorld world = getMultiverseWorld(worldName);
                         if (world == null) {
-                            throw new InvalidCommandArgument("World " + worldName + " is not a multiverse world.");
+                            throw new InvalidCommandArgument(
+                                    multiverseWorldInputMessage(worldName).formatted(context.getIssuer()));
                         }
                         worlds.add(world);
                     }
                     return worlds.isEmpty() ? null : worlds.toArray(new MultiverseWorld[0]);
                 })
-                .issuerOnlyFailMessage((context) -> Message.of("This command can only be used by a player in a Multiverse World."))
-                .issuerAwarePlayerFailMessage((context, player) -> Message.of("You are not in a multiverse world. Either specify a multiverse world name or use this command in a multiverse world."))
-                .issuerAwareInputFailMessage((context, input) -> Message.of("World '" + input + "' is not a multiverse world. Remember to specify the world name when using this command in console."))
-                .inputOnlyFailMessage((context, input) -> Message.of("World " + input + " is not a multiverse world."));
+                .issuerOnlyFailMessage((context) -> multiverseWorldPlayerOnlyMessage())
+                .issuerAwarePlayerFailMessage((context, player) -> multiverseWorldIssuerMessage())
+                .issuerAwareInputFailMessage((context, input) -> multiverseWorldInputConsoleMessage(input))
+                .inputOnlyFailMessage((context, input) -> multiverseWorldInputMessage(input));
     }
 
     @Nullable
@@ -265,9 +323,9 @@ public class MVCommandContexts extends PaperCommandContexts {
         return new IssuerAwareContextBuilder<Player>()
                 .fromPlayer((context, player) -> player)
                 .fromInput((context, input) -> PlayerFinder.get(input, context.getSender()))
-                .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."));
+                .issuerOnlyFailMessage((context) -> playerOnlyMessage())
+                .issuerAwareInputFailMessage((context, input) -> playerInputIssuerMessage(input))
+                .inputOnlyFailMessage((context, input) -> playerInputMessage(input));
     }
 
     private IssuerAwareContextBuilder<Player[]> playerArrayContextBuilder() {
@@ -284,13 +342,13 @@ public class MVCommandContexts extends PaperCommandContexts {
                             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."))
+                .issuerOnlyFailMessage((context) -> playerOnlyMessage())
+                .issuerAwareInputFailMessage((context, input) -> playerInputIssuerMessage(input))
                 .inputOnlyFailMessage((context, input) -> {
                     if (PlayerFinder.isSelector(input)) {
-                        return Message.of("No player(s) matched selector: " + input + ".");
+                        return playerSelectorMessage(input);
                     }
-                    return Message.of("Player(s) " + input + " not found.");
+                    return playersInputMessage(input);
                 });
     }
 
@@ -393,4 +451,13 @@ public class MVCommandContexts extends PaperCommandContexts {
         }
         return categories.toArray(new SpawnCategory[0]);
     }
+
+    private TickDuration parseTickDuration(BukkitCommandExecutionContext context) {
+        String arg = context.popFirstArg();
+        return TickDuration.parseString(arg)
+                .getOrElseThrow(failure ->
+                        new InvalidCommandArgument("Invalid time duration format: \"" +arg + "\". Use a number " +
+                                "followed by an optional suffix (s for seconds, d for game days) or just a number " +
+                                "for ticks. Examples: 100, 5s, 2d"));
+    }
 }

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

@@ -12,6 +12,8 @@ import co.aikar.commands.LogLevel;
 import co.aikar.commands.PaperCommandManager;
 import co.aikar.commands.RootCommand;
 import com.dumptruckman.minecraft.util.Logging;
+import jakarta.annotation.PostConstruct;
+import jakarta.annotation.PreDestroy;
 import jakarta.inject.Inject;
 import jakarta.inject.Provider;
 import org.bukkit.Bukkit;
@@ -24,6 +26,7 @@ import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
 import org.mvplugins.multiverse.core.command.queue.CommandQueueManager;
 import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.locale.PluginLocales;
+import org.mvplugins.multiverse.core.locale.message.LocalizedMessage;
 import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.helpers.WorldNameChecker;
 
@@ -62,13 +65,22 @@ public class MVCommandManager extends PaperCommandManager {
         this.config = config;
         this.pluginLocales = new PluginLocales(this);
         this.locales = this.pluginLocales;
-        this.pluginLocales.loadLanguages();
 
         MVCommandConditions.load(this, worldManager, worldNameChecker);
         this.enableUnstableAPI("help");
         this.setDefaultExceptionHandler(new MVDefaultExceptionHandler());
     }
 
+    @PostConstruct
+    private void postConstruct() {
+        LocalizedMessage.setDefaultLocalesManager(getLocales());
+    }
+
+    @PreDestroy
+    private void preDestroy() {
+        LocalizedMessage.setDefaultLocalesManager(null);
+    }
+
     /**
      * Registers a list of commands and handles {@link LegacyAliasCommand} based on config option.
      * @param commands  The commands to register

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

@@ -6,12 +6,16 @@ import co.aikar.commands.InvalidCommandArgument;
 import co.aikar.commands.contexts.IssuerAwareContextResolver;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 
 import java.util.Objects;
 import java.util.function.BiFunction;
 import java.util.function.Function;
 
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
 /**
  * Reusable logic of issuer only and issuer aware context resolvers
  *
@@ -22,10 +26,17 @@ public final class IssuerAwareContextBuilder<T> {
 
     private BiFunction<BukkitCommandExecutionContext, Player, T> fromPlayer;
     private BiFunction<BukkitCommandExecutionContext, String, T> fromInput;
-    private Function<BukkitCommandExecutionContext, Message> issuerOnlyFailMessage = context -> Message.of("This command can only be used by a player.");
-    private BiFunction<BukkitCommandExecutionContext, Player, Message> issuerAwarePlayerFailMessage = (context, player) -> Message.of("Unable to resolve context for player '" + player.getName() + "'.");
-    private BiFunction<BukkitCommandExecutionContext, String, Message> issuerAwareInputFailMessage = (context, input) -> Message.of("Unable to resolve context for input '" + input + "'.");
-    private BiFunction<BukkitCommandExecutionContext, String, Message> inputOnlyFailMessage = (context, input) -> Message.of("Unable to resolve context for input '" + input + "'.");
+    private Function<BukkitCommandExecutionContext, Message> issuerOnlyFailMessage =
+            context -> Message.of(MVCorei18n.COMMANDS_ERROR_PLAYERSONLY);
+    private BiFunction<BukkitCommandExecutionContext, Player, Message> issuerAwarePlayerFailMessage =
+            (context, player) -> Message.of(MVCorei18n.COMMANDS_ERROR_RESOLVE_PLAYER,
+                    Replace.PLAYER.with(player.getName()));
+    private BiFunction<BukkitCommandExecutionContext, String, Message> issuerAwareInputFailMessage =
+            (context, input) -> Message.of(MVCorei18n.COMMANDS_ERROR_RESOLVE_INPUT,
+                    replace("{input}").with(input));
+    private BiFunction<BukkitCommandExecutionContext, String, Message> inputOnlyFailMessage =
+            (context, input) -> Message.of(MVCorei18n.COMMANDS_ERROR_RESOLVE_INPUT,
+                    replace("{input}").with(input));
 
     public IssuerAwareContextBuilder() {
     }

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

@@ -5,8 +5,10 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Locale;
 import java.util.function.Function;
+import java.util.function.Supplier;
 
 import co.aikar.commands.InvalidCommandArgument;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -40,34 +42,34 @@ public class CommandValueFlag<T> extends CommandFlag {
 
     private final Class<T> type;
     private final boolean optional;
-    private final T defaultValue;
+    private final Supplier<? extends T> defaultValueSupplier;
     private final Function<String, T> context;
     private final Function<String, Collection<String>>  completion;
 
     /**
      * Creates a new flag.
      *
-     * @param key               The key for the new flag.
-     * @param aliases           The aliases that also refer to this flag.
-     * @param type              The type of the value.
-     * @param optional          Allow for flag without value.
-     * @param defaultValue      The default value if optional is true and user does not specify a value.
-     * @param context           Function to parse string into value type.
-     * @param completion        Function to get completion for this flag.
+     * @param key                   The key for the new flag.
+     * @param aliases               The aliases that also refer to this flag.
+     * @param type                  The type of the value.
+     * @param optional              Allow for flag without value.
+     * @param defaultValueSupplier  The default value if optional is true and user does not specify a value.
+     * @param context               Function to parse string into value type.
+     * @param completion            Function to get completion for this flag.
      */
     protected CommandValueFlag(
             @NotNull String key,
             @NotNull List<String> aliases,
             @NotNull Class<T> type,
             boolean optional,
-            @Nullable T defaultValue,
+            @Nullable Supplier<? extends T> defaultValueSupplier,
             @Nullable Function<String, T> context,
             @Nullable Function<String, Collection<String>>  completion
     ) {
         super(key, aliases);
         this.type = type;
         this.optional = optional;
-        this.defaultValue = defaultValue;
+        this.defaultValueSupplier = defaultValueSupplier;
         this.context = context;
         this.completion = completion;
     }
@@ -96,7 +98,7 @@ public class CommandValueFlag<T> extends CommandFlag {
      * @return The default value.
      */
     public @Nullable T getDefaultValue() {
-        return defaultValue;
+        return defaultValueSupplier == null ? null : defaultValueSupplier.get();
     }
 
     /**
@@ -126,7 +128,7 @@ public class CommandValueFlag<T> extends CommandFlag {
     public static class Builder<T, S extends Builder<T, S>> extends CommandFlag.Builder<S> {
         protected final Class<T> type;
         protected boolean optional = false;
-        protected T defaultValue = null;
+        protected Supplier<? extends T> defaultValueSupplier = null;
         protected Function<String, T> context = null;
         protected Function<String, Collection<String>> completion = null;
 
@@ -158,7 +160,21 @@ public class CommandValueFlag<T> extends CommandFlag {
          * @return The builder.
          */
         public @NotNull S defaultValue(@NotNull T defaultValue) {
-            this.defaultValue = defaultValue;
+            return defaultValue(() -> defaultValue);
+        }
+
+        /**
+         * Set the default value supplier. Used if optional is true and user does not specify a value.
+         * Supplier is only called when command is executed with the flag is present in input.
+         *
+         * @param defaultValueSupplier The default value supplier
+         * @return The builder
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull S defaultValue(@NotNull Supplier<? extends T> defaultValueSupplier) {
+            this.defaultValueSupplier = defaultValueSupplier;
             return (S) this;
         }
 
@@ -194,7 +210,7 @@ public class CommandValueFlag<T> extends CommandFlag {
             if (context == null && !String.class.equals(type)) {
                 throw new IllegalStateException("Context is required for non-string value flags");
             }
-            return new CommandValueFlag<>(key, aliases, type, optional, defaultValue, context, completion);
+            return new CommandValueFlag<>(key, aliases, type, optional, defaultValueSupplier, context, completion);
         }
     }
 
@@ -207,7 +223,7 @@ public class CommandValueFlag<T> extends CommandFlag {
     public static class EnumBuilder<T extends Enum<T>, S extends EnumBuilder<T, S>> extends CommandFlag.Builder<S> {
         protected final Class<T> type;
         protected boolean optional = false;
-        protected T defaultValue = null;
+        protected Supplier<? extends T> defaultValueSupplier = null;
         protected Function<String, T> context = null;
         protected Function<String, Collection<String>>  completion = null;
 
@@ -253,7 +269,21 @@ public class CommandValueFlag<T> extends CommandFlag {
          * @return The builder.
          */
         public @NotNull S defaultValue(@NotNull T defaultValue) {
-            this.defaultValue = defaultValue;
+            return defaultValue(() -> defaultValue);
+        }
+
+        /**
+         * Set the default value to supply. Used if optional is true and user does not specify a value.
+         * Supplier is only called when command is executed with the flag is present in input.
+         *
+         * @param defaultValueSupplier The default value supplier.
+         * @return The builder.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull S defaultValue(@NotNull Supplier<? extends T> defaultValueSupplier) {
+            this.defaultValueSupplier = defaultValueSupplier;
             return (S) this;
         }
 
@@ -264,7 +294,7 @@ public class CommandValueFlag<T> extends CommandFlag {
          */
         @Override
         public @NotNull CommandValueFlag<T> build() {
-            return new CommandValueFlag<>(key, aliases, type, optional, defaultValue, context, completion);
+            return new CommandValueFlag<>(key, aliases, type, optional, defaultValueSupplier, context, completion);
         }
     }
 }

src/main/java/org/mvplugins/multiverse/core/command/flags/RemovePlayerDestinationFlags.java

@@ -0,0 +1,67 @@
+package org.mvplugins.multiverse.core.command.flags;
+
+import jakarta.inject.Inject;
+import org.bukkit.Bukkit;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jvnet.hk2.annotations.Service;
+import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
+import org.mvplugins.multiverse.core.command.flag.CommandValueFlag;
+import org.mvplugins.multiverse.core.command.flag.FlagBuilder;
+import org.mvplugins.multiverse.core.destination.DestinationInstance;
+import org.mvplugins.multiverse.core.destination.DestinationsProvider;
+import org.mvplugins.multiverse.core.destination.core.WorldDestination;
+import org.mvplugins.multiverse.core.exceptions.command.MVInvalidCommandArgument;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.world.WorldManager;
+
+@ApiStatus.AvailableSince("5.7")
+@Service
+public class RemovePlayerDestinationFlags extends FlagBuilder {
+
+    public static final String NAME = "removeplayer";
+
+    private WorldManager worldManager;
+    private DestinationsProvider destinationsProvider;
+    private WorldDestination worldDestination;
+
+    protected RemovePlayerDestinationFlags(
+            @NotNull String name,
+            @NotNull CommandFlagsManager flagsManager,
+            @NotNull WorldManager worldManager,
+            @NotNull DestinationsProvider destinationsProvider,
+            @NotNull WorldDestination worldDestination
+    ) {
+        super(name, flagsManager);
+        this.worldManager = worldManager;
+        this.destinationsProvider = destinationsProvider;
+        this.worldDestination = worldDestination;
+    }
+
+    @Inject
+    private RemovePlayerDestinationFlags(
+            @NotNull CommandFlagsManager flagsManager,
+            @NotNull WorldManager worldManager,
+            @NotNull DestinationsProvider destinationsProvider,
+            @NotNull WorldDestination worldDestination
+    ) {
+        super(NAME, flagsManager);
+        this.destinationsProvider = destinationsProvider;
+        this.worldManager = worldManager;
+        this.worldDestination = worldDestination;
+    }
+
+    public final CommandValueFlag<DestinationInstance> removePlayers = flag(CommandValueFlag.builder("--remove-players", DestinationInstance.class)
+            .addAlias("-r")
+            .defaultValue(() -> worldManager.getDefaultWorld()
+                    .map(defaultWorld -> worldDestination.fromWorld(defaultWorld))
+                    .getOrElseThrow(() -> MVInvalidCommandArgument.of(
+                            Message.of(MVCorei18n.COMMANDS_ERROR_REMOVEPLAYERS_NODEFAULT))))
+            .completion(input -> destinationsProvider.suggestDestinationStrings(Bukkit.getConsoleSender(), input))
+            .context(input -> destinationsProvider.parseDestination(input)
+                    .getOrThrow(failure ->
+                            MVInvalidCommandArgument.of(failure.getFailureMessage())))
+            .optional()
+            .build());
+}

src/main/java/org/mvplugins/multiverse/core/command/flags/RemovePlayerFlags.java

@@ -1,12 +1,19 @@
 package org.mvplugins.multiverse.core.command.flags;
 
 import jakarta.inject.Inject;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.command.flag.CommandFlag;
 import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
 import org.mvplugins.multiverse.core.command.flag.FlagBuilder;
 
+/**
+ * @deprecated The --remove-players flag is being removed in favor of a more flexible system that allows for specifying
+ * a destination for players to be teleported to when a world is unloaded. See {@link RemovePlayerDestinationFlags}.
+ */
+@Deprecated(forRemoval = true, since = "5.7")
+@ApiStatus.ScheduledForRemoval(inVersion = "6.0")
 @Service
 public class RemovePlayerFlags extends FlagBuilder {
 

src/main/java/org/mvplugins/multiverse/core/command/queue/CommandQueueManager.java

@@ -15,7 +15,6 @@ import com.dumptruckman.minecraft.util.Logging;
 import io.vavr.control.Option;
 import jakarta.inject.Inject;
 import org.bukkit.Bukkit;
-import org.bukkit.ChatColor;
 import org.bukkit.block.data.type.CommandBlock;
 import org.bukkit.command.BlockCommandSender;
 import org.bukkit.command.CommandSender;
@@ -28,6 +27,7 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.MultiverseCore;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
 import org.mvplugins.multiverse.core.config.CoreConfig;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.utils.result.Attempt;
 
 import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.*;
@@ -79,8 +79,9 @@ public class CommandQueueManager {
         if (config.getUseConfirmOtp()) {
             confirmCommand += " " + payload.otp();
         }
-        payload.issuer().sendMessage(String.format("Run %s%s %sto continue. This will expire in %s seconds.",
-                ChatColor.GREEN, confirmCommand, ChatColor.WHITE, config.getConfirmTimeout()));
+        payload.issuer().sendMessage(MVCorei18n.QUEUECOMMAND_PROMPT,
+                replace("{command}").with(confirmCommand),
+                replace("{timeout}").with(config.getConfirmTimeout()));
     }
 
     /**
@@ -127,7 +128,7 @@ public class CommandQueueManager {
                 // Payload already removed
                 return;
             }
-            payload.issuer().sendMessage("Your queued command has expired.");
+            payload.issuer().sendMessage(MVCorei18n.QUEUECOMMAND_EXPIRED);
         };
     }
 

src/main/java/org/mvplugins/multiverse/core/command/queue/CommandQueuePayload.java

@@ -5,6 +5,7 @@ import org.bukkit.scheduler.BukkitTask;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.Message;
 
 /**
@@ -23,12 +24,10 @@ public class CommandQueuePayload {
         return new CommandQueuePayload(issuer);
     }
 
-    private static final String DEFAULT_PROMPT_MESSAGE = "The command you are trying to run is deemed dangerous."; // todo: localize
-
     private final MVCommandIssuer issuer;
     private String otp;
     private Runnable action = () -> {};
-    private Message prompt = Message.of(DEFAULT_PROMPT_MESSAGE);
+    private Message prompt = Message.of(MVCorei18n.QUEUECOMMAND_DEFAULTPROMPT);
     private BukkitTask expireTask;
 
     protected CommandQueuePayload(@NotNull MVCommandIssuer issuer) {

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

@@ -12,6 +12,9 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.anchor.AnchorManager;
 import org.mvplugins.multiverse.core.anchor.MultiverseAnchor;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
 
 @Service
 final class AnchorDeleteCommand extends CoreCommand {
@@ -35,9 +38,9 @@ final class AnchorDeleteCommand extends CoreCommand {
             @Description("")
             MultiverseAnchor anchor) {
         if (anchorManager.deleteAnchor(anchor).isSuccess()) {
-            issuer.sendMessage("&aAnchor &f" + anchor.getName() + "&a deleted.");
+            issuer.sendMessage(MVCorei18n.ANCHOR_DELETE_SUCCESS, replace("{anchor}").with(anchor.getName()));
         } else {
-            issuer.sendMessage("&cFailed to delete anchor.");
+            issuer.sendError(MVCorei18n.ANCHOR_DELETE_FAILURE);
         }
     }
 }

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

@@ -15,15 +15,18 @@ import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.anchor.AnchorManager;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
-import org.mvplugins.multiverse.core.command.MVCommandManager;
 import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
 import org.mvplugins.multiverse.core.command.flags.PageFilterFlags;
 import org.mvplugins.multiverse.core.display.ContentDisplay;
 import org.mvplugins.multiverse.core.display.filters.DefaultContentFilter;
 import org.mvplugins.multiverse.core.display.handlers.PagedSendHandler;
 import org.mvplugins.multiverse.core.display.parsers.ListContentProvider;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
 import org.mvplugins.multiverse.core.teleportation.LocationManipulation;
 
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
 @Service
 final class AnchorListCommand extends CoreCommand {
 
@@ -58,18 +61,19 @@ final class AnchorListCommand extends CoreCommand {
         ContentDisplay.create()
                 .addContent(ListContentProvider.forContent(getAnchors(issuer.getPlayer())))
                 .withSendHandler(PagedSendHandler.create()
-                        .withHeader("&3==== [ Multiverse Anchors ] ====")
+                        .withHeader(Message.of(MVCorei18n.ANCHOR_LIST_HEADER))
                         .doPagination(true)
                         .withTargetPage(parsedFlags.flagValue(flags.page, 1))
                         .withFilter(parsedFlags.flagValue(flags.filter, DefaultContentFilter.get())))
                 .send(issuer);
     }
 
-    private List<String> getAnchors(Player player) {
+    private List<? extends Message> getAnchors(Player player) {
         return anchorManager.getAnchors(player).stream()
                 .map(anchor ->
-                        "&a%s&7 - &f%s".formatted(
-                                anchor.getName(), locationManipulation.locationToString(anchor.getLocation())))
+                        Message.of(MVCorei18n.ANCHOR_LIST_ENTRY,
+                                replace("{anchor}").with(anchor.getName()),
+                                replace("{location}").with(locationManipulation.locationToString(anchor.getLocation()))))
                 .toList();
     }
 }

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

@@ -15,8 +15,11 @@ import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.anchor.AnchorManager;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.teleportation.LocationManipulation;
 
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
 @Service
 final class AnchorSetCommand extends CoreCommand {
 
@@ -80,10 +83,12 @@ final class AnchorSetCommand extends CoreCommand {
     }
 
     private void sendAnchorSetSuccessMessage(MVCommandIssuer issuer, String anchorName, String locationString) {
-        issuer.sendMessage("&aAnchor &f" + anchorName + "&a set to &f" + locationString);
+        issuer.sendMessage(MVCorei18n.ANCHOR_SET_SUCCESS,
+                replace("{anchor}").with(anchorName),
+                replace("{location}").with(locationString));
     }
 
     private void sendAnchorSetFailedMessage(MVCommandIssuer issuer, String anchorName) {
-        issuer.sendMessage("&cFailed to set anchor &f" + anchorName + ".");
+        issuer.sendMessage(MVCorei18n.ANCHOR_SET_FAILURE, replace("{anchor}").with(anchorName));
     }
 }

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

@@ -61,7 +61,7 @@ class CheckCommand extends CoreCommand {
                 replace("{location}").with(destination.getLocation(player)
                         .map(locationManipulation::locationToString)
                         .map(Message::of)
-                        .getOrElse(() -> Message.of(MVCorei18n.GENERIC_NULL, "Null!"))));
+                        .getOrElse(() -> Message.of(MVCorei18n.GENERIC_NULL))));
 
         // TODO: Show permission required for this particular destination
     }

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

@@ -20,7 +20,7 @@ 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.world.LoadedMultiverseWorld;
+import org.mvplugins.multiverse.core.world.MultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.options.CloneWorldOptions;
 
@@ -41,21 +41,21 @@ class CloneCommand extends CoreCommand {
     @Subcommand("clone")
     @CommandPermission("multiverse.core.clone")
     @CommandCompletion("@mvworlds:scope=loaded @empty @flags:groupName=" + Flags.NAME)
-    @Syntax("<world> <new-world-name> [--reset-world-config --reset-gamerules --reset-world-border]")
+    @Syntax("<world> <new-world-name> [--reset-world-config --reset-gamerules --reset-world-border --no-save]")
     @Description("{@@mv-core.clone.description}")
     void onCloneCommand(
             MVCommandIssuer issuer,
 
             @Syntax("<world>")
             @Description("{@@mv-core.clone.world.description}")
-            LoadedMultiverseWorld world,
+            MultiverseWorld world,
 
             @Syntax("<new-world-name>")
-            @Description("{@@mv-core.clone.newWorld.description}")
+            @Description("{@@mv-core.clone.newworld.description}")
             String newWorldName,
 
             @Optional
-            @Syntax("[--reset-world-config --reset-gamerules --reset-world-border]")
+            @Syntax("[--reset-world-config --reset-gamerules --reset-world-border --no-save]")
             @Description("{@@mv-core.regen.other.description}")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
@@ -114,7 +114,7 @@ class CloneCommand extends CoreCommand {
 
         @Override
         @CommandAlias("mvcl|mvclone")
-        void onCloneCommand(MVCommandIssuer issuer, LoadedMultiverseWorld world, String newWorldName, String[] flags) {
+        void onCloneCommand(MVCommandIssuer issuer, MultiverseWorld world, String newWorldName, String[] flags) {
             super.onCloneCommand(issuer, world, newWorldName, flags);
         }
     }

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

@@ -11,6 +11,7 @@ import co.aikar.commands.annotation.Optional;
 import co.aikar.commands.annotation.Subcommand;
 import co.aikar.commands.annotation.Syntax;
 import com.dumptruckman.minecraft.util.Logging;
+import io.vavr.control.Try;
 import jakarta.inject.Inject;
 import org.bukkit.World;
 import org.bukkit.WorldType;
@@ -24,9 +25,11 @@ import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
 import org.mvplugins.multiverse.core.command.flag.CommandValueFlag;
 import org.mvplugins.multiverse.core.command.flag.FlagBuilder;
 import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
+import org.mvplugins.multiverse.core.exceptions.command.MVInvalidCommandArgument;
 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.position.EntityPosition;
 import org.mvplugins.multiverse.core.utils.result.Attempt.Failure;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
@@ -52,8 +55,9 @@ class CreateCommand extends CoreCommand {
     @Subcommand("create")
     @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> --properties <prop1=value1,prop2=value2,...>]")
+    @Syntax("<name> <environment> [--seed <seed> --generator <generator[:id]> --world-type <worldtype> " +
+            "--no-adjust-spawn --no-structures --generate-bonus-chest --force-spawn-position <x,y,z:pitch:yaw> " +
+            "--biome <biome> --generator-settings <json-settings> --properties <prop1=value1,prop2=value2,...>]")
     @Description("{@@mv-core.create.description}")
     void onCreateCommand(
             MVCommandIssuer issuer,
@@ -67,8 +71,9 @@ class CreateCommand extends CoreCommand {
             World.Environment environment,
 
             @Optional
-            @Syntax("[--seed <seed> --generator <generator[:id]> --world-type <worldtype> --adjust-spawn "
-                    + "--no-structures --biome <biome> --properties <prop1=value1,prop2=value2,...>]")
+            @Syntax("[--seed <seed> --generator <generator[:id]> --world-type <worldtype> --no-adjust-spawn " +
+                    "--no-structures --generate-bonus-chest --force-spawn-position <x,y,z:pitch:yaw> --biome <biome> " +
+                    "--generator-settings <json-settings> --properties <prop1=value1,prop2=value2,...>]")
             @Description("{@@mv-core.create.flags.description}")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
@@ -79,14 +84,16 @@ class CreateCommand extends CoreCommand {
 
         worldManager.createWorld(CreateWorldOptions.worldName(worldName)
                         .biome(parsedFlags.flagValue(flags.biome, ""))
+                        .bonusChest(parsedFlags.hasFlag(flags.bonusChest))
                         .environment(environment)
-                        .seed(parsedFlags.flagValue(flags.seed))
-                        .worldType(parsedFlags.flagValue(flags.worldType, WorldType.NORMAL))
-                        .useSpawnAdjust(!parsedFlags.hasFlag(flags.noAdjustSpawn))
+                        .forcedSpawnPosition(parsedFlags.flagValue(flags.forceSpawnPosition))
                         .generator(parsedFlags.flagValue(flags.generator, ""))
                         .generatorSettings(parsedFlags.flagValue(flags.generatorSettings, ""))
                         .generateStructures(!parsedFlags.hasFlag(flags.noStructures))
-                        .worldPropertyStrings(StringFormatter.parseCSVMap(parsedFlags.flagValue(flags.properties))))
+                        .seed(parsedFlags.flagValue(flags.seed))
+                        .useSpawnAdjust(!parsedFlags.hasFlag(flags.noAdjustSpawn))
+                        .worldPropertyStrings(StringFormatter.parseCSVMap(parsedFlags.flagValue(flags.properties)))
+                        .worldType(parsedFlags.flagValue(flags.worldType, WorldType.NORMAL)))
                 .onSuccess(newWorld -> messageSuccess(issuer, newWorld))
                 .onFailure(failure -> messageFailure(issuer, failure));
     }
@@ -185,6 +192,15 @@ class CreateCommand extends CoreCommand {
         private final CommandValueFlag<String> properties = flag(CommandValueFlag.builder("--properties", String.class)
                 .addAlias("-p")
                 .build());
+
+        private final CommandFlag bonusChest = flag(CommandFlag.builder("--generate-bonus-chest")
+                .addAlias("-c")
+                .build());
+
+        private final CommandValueFlag<EntityPosition> forceSpawnPosition = flag(CommandValueFlag.builder("--force-spawn-position", EntityPosition.class)
+                .addAlias("-f")
+                .context(input -> Try.of(() -> EntityPosition.fromString(input)).getOrElseThrow(MVInvalidCommandArgument::causeBy))
+                .build());
     }
 
     @Service

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

@@ -15,11 +15,11 @@ 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.ParsedCommandFlags;
-import org.mvplugins.multiverse.core.command.flags.RemovePlayerFlags;
+import org.mvplugins.multiverse.core.command.flags.RemovePlayerDestinationFlags;
 import org.mvplugins.multiverse.core.command.queue.CommandQueueManager;
 import org.mvplugins.multiverse.core.command.queue.CommandQueuePayload;
+import org.mvplugins.multiverse.core.destination.DestinationInstance;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.Message;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
@@ -31,6 +31,8 @@ import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.helpers.PlayerWorldTeleporter;
 import org.mvplugins.multiverse.core.world.options.DeleteWorldOptions;
 
+import java.util.Objects;
+
 @Service
 class DeleteCommand extends CoreCommand {
 
@@ -38,7 +40,7 @@ class DeleteCommand extends CoreCommand {
     private final WorldManager worldManager;
     private final PlayerWorldTeleporter playerWorldTeleporter;
     private final WorldTickDeferrer worldTickDeferrer;
-    private final RemovePlayerFlags flags;
+    private final RemovePlayerDestinationFlags flags;
 
     @Inject
     DeleteCommand(
@@ -46,7 +48,7 @@ class DeleteCommand extends CoreCommand {
             @NotNull WorldManager worldManager,
             @NotNull PlayerWorldTeleporter playerWorldTeleporter,
             @NotNull WorldTickDeferrer worldTickDeferrer,
-            @NotNull RemovePlayerFlags flags
+            @NotNull RemovePlayerDestinationFlags flags
     ) {
         this.commandQueueManager = commandQueueManager;
         this.worldManager = worldManager;
@@ -57,8 +59,8 @@ class DeleteCommand extends CoreCommand {
 
     @Subcommand("delete")
     @CommandPermission("multiverse.core.delete")
-    @CommandCompletion("@mvworlds:scope=both @flags:groupName=" + RemovePlayerFlags.NAME)
-    @Syntax("<world>")
+    @CommandCompletion("@mvworlds:scope=both @flags:groupName=" + RemovePlayerDestinationFlags.NAME)
+    @Syntax("<world> [--remove-players [destination]]")
     @Description("{@@mv-core.delete.description}")
     void onDeleteCommand(
             MVCommandIssuer issuer,
@@ -69,7 +71,7 @@ class DeleteCommand extends CoreCommand {
             MultiverseWorld world,
 
             @Optional
-            @Syntax("[--remove-players]")
+            @Syntax("[--remove-players [destination]]")
             @Description("")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
@@ -77,21 +79,22 @@ class DeleteCommand extends CoreCommand {
         commandQueueManager.addToQueue(CommandQueuePayload
                 .issuer(issuer)
                 .action(() -> runDeleteCommand(issuer, world, parsedFlags))
-                .prompt(Message.of(MVCorei18n.DELETE_PROMPT, "",
+                .prompt(Message.of(MVCorei18n.DELETE_PROMPT,
                         Replace.WORLD.with(world.getName()))));
     }
 
     private void runDeleteCommand(MVCommandIssuer issuer, MultiverseWorld world, ParsedCommandFlags parsedFlags) {
         issuer.sendInfo(MVCorei18n.DELETE_DELETING, Replace.WORLD.with(world.getName()));
 
-        var future = parsedFlags.hasFlag(flags.removePlayers)
+        DestinationInstance<?, ?> removeToDestination = parsedFlags.flagValue(flags.removePlayers);
+        var future = Objects.nonNull(removeToDestination)
                         && world.isLoaded()
                         && world instanceof LoadedMultiverseWorld loadedWorld
-                ? playerWorldTeleporter.removeFromWorld(loadedWorld)
+                ? playerWorldTeleporter.transferAllFromWorldToDestination(loadedWorld, removeToDestination)
                 : AsyncAttemptsAggregate.emptySuccess();
 
         future.onSuccess(() -> worldTickDeferrer.deferWorldTick(() -> doWorldDeleting(issuer, world)))
-                .onFailure(() -> issuer.sendError("Failed to teleport one or more players out of the world!"));
+                .onFailure(() -> issuer.sendError(MVCorei18n.GENERIC_TELEPORTPLAYERS_FAILED));
     }
 
     private void doWorldDeleting(MVCommandIssuer issuer, MultiverseWorld world) {
@@ -113,7 +116,7 @@ class DeleteCommand extends CoreCommand {
                 @NotNull WorldManager worldManager,
                 @NotNull PlayerWorldTeleporter playerWorldTeleporter,
                 @NotNull WorldTickDeferrer worldTickDeferrer,
-                @NotNull RemovePlayerFlags flags) {
+                @NotNull RemovePlayerDestinationFlags flags) {
             super(commandQueueManager, worldManager, playerWorldTeleporter, worldTickDeferrer, flags);
         }
 

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

@@ -12,13 +12,10 @@ import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
 import org.mvplugins.multiverse.core.command.flag.FlagBuilder;
-import org.mvplugins.multiverse.core.commands.DumpsLogPoster.LogsType;
+import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
 import org.mvplugins.multiverse.core.commands.DumpsLogPoster.UploadType;
 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.CommandValueFlag;
-import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
 
 @Service
 final class DumpsCommand extends CoreCommand {
@@ -35,22 +32,17 @@ final class DumpsCommand extends CoreCommand {
     @Subcommand("dumps")
     @CommandPermission("multiverse.core.dumps")
     @CommandCompletion("@flags:groupName=" + Flags.NAME)
-    @Syntax("[--logs <mclogs | append>] [--upload <pastesdev | pastegg>] [--paranoid]")
+    @Syntax("[--upload <pastesdev|mclogs>]")
     @Description("{@@mv-core.dumps.description}")
     void onDumpsCommand(
             MVCommandIssuer issuer,
 
             @Optional
-            @Syntax("[--logs <mclogs | append>] [--upload <pastesdev | pastegg>] [--paranoid]")
+            @Syntax("[--upload <pastesdev|mclogs>]")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
-
-        // Grab all our flags
-        boolean paranoid = parsedFlags.hasFlag(flags.paranoid);
-        LogsType logsType = parsedFlags.flagValue(flags.logs, LogsType.MCLOGS);
         UploadType servicesType = parsedFlags.flagValue(flags.upload, UploadType.PASTESDEV);
-
-        dumpsService.postLogs(issuer, logsType, servicesType, paranoid);
+        dumpsService.postLogs(issuer, servicesType);
     }
 
     @Service
@@ -63,19 +55,9 @@ final class DumpsCommand extends CoreCommand {
             super(NAME, flagsManager);
         }
 
-        private final CommandValueFlag<LogsType> logs = flag(CommandValueFlag
-                .enumBuilder("--logs", LogsType.class)
-                .addAlias("-l")
-                .build());
-
         private final CommandValueFlag<UploadType> upload = flag(CommandValueFlag
                 .enumBuilder("--upload", UploadType.class)
                 .addAlias("-u")
                 .build());
-
-        // Does not upload logs or plugin list (except if --logs mclogs is there)
-        private final CommandFlag paranoid = flag(CommandFlag.builder("--paranoid")
-                .addAlias("-p")
-                .build());
     }
 }

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

@@ -1,11 +1,19 @@
 package org.mvplugins.multiverse.core.commands;
 
+import java.lang.management.ManagementFactory;
+import java.time.Instant;
+import java.util.Date;
 import java.util.Map;
 
 import com.dumptruckman.minecraft.util.Logging;
+import io.vavr.control.Option;
+import net.minidev.json.JSONArray;
+import net.minidev.json.JSONObject;
+import org.bukkit.plugin.Plugin;
 import org.bukkit.scheduler.BukkitRunnable;
 import org.jetbrains.annotations.NotNull;
 
+import org.mvplugins.multiverse.core.MultiverseCore;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
 import org.mvplugins.multiverse.core.event.MVDumpsDebugInfoEvent;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
@@ -18,8 +26,10 @@ final class DumpsLogPoster extends BukkitRunnable {
 
     enum UploadType {
         // BEGIN CHECKSTYLE-SUPPRESSION: JavadocVariable
-        PASTEGG(PasteServiceType.PASTEGG, "paste.gg"),
-        PASTESDEV(PasteServiceType.PASTESDEV, "pastes.dev");
+        // PASTEBIN(PasteServiceType.PASTEBIN, "pastebin.com"),
+        PASTESDEV(PasteServiceType.PASTESDEV, "pastes.dev"),
+        MCLOGS(PasteServiceType.MCLOGS, "mclo.gs"),
+        ;
         // END CHECKSTYLE-SUPPRESSION: JavadocVariable
 
         private final PasteServiceType pasteServiceType;
@@ -31,34 +41,21 @@ final class DumpsLogPoster extends BukkitRunnable {
         }
     }
 
-    enum LogsType {
-        /**
-         * Appends the log file to the debug info.
-         */
-        APPEND,
-        /**
-         * Uploads the log file to a paste service.
-         */
-        MCLOGS
-    }
-
+    @NotNull
+    private final MultiverseCore plugin;
     private final MVCommandIssuer issuer;
-    private final LogsType logsType;
     private final UploadType uploadType;
-    private final boolean paranoid;
     private final String logs;
     private final MVDumpsDebugInfoEvent versionEvent;
 
-    DumpsLogPoster(@NotNull MVCommandIssuer issuer,
-                   @NotNull DumpsLogPoster.LogsType logsType,
+    DumpsLogPoster(@NotNull MultiverseCore core,
+                   @NotNull MVCommandIssuer issuer,
                    @NotNull DumpsLogPoster.UploadType uploadType,
-                   boolean paranoid,
                    @NotNull String logs,
                    @NotNull MVDumpsDebugInfoEvent versionEvent) {
+        this.plugin = core;
         this.issuer = issuer;
-        this.logsType = logsType;
         this.uploadType = uploadType;
-        this.paranoid = paranoid;
         this.logs = logs;
         this.versionEvent = versionEvent;
     }
@@ -69,24 +66,12 @@ final class DumpsLogPoster extends BukkitRunnable {
         handleVersionEvent();
     }
 
-    @SuppressWarnings("checkstyle:MissingSwitchDefault")
     private void handleLogs() {
-        Logging.finer("Logs type is: " + logsType);
-
-        if (!paranoid) {
-            switch (logsType) {
-                case MCLOGS -> sendDumpsUrl("Logs", postRawDataToMcLogs(logs));
-                case APPEND -> versionEvent.putDetailedDebugInfo("latest.log", logs);
-                default -> Logging.finer("Not uploading logs.");
-            }
-        } else {
-            Logging.finer("Paranoid mode is on, not uploading logs.");
-        }
+        versionEvent.putDetailedDebugInfo("latest.log", logs);
     }
 
     private void handleVersionEvent() {
         Logging.finer("Upload service is: " + uploadType);
-
         final Map<String, String> files = versionEvent.getDetailedDebugInfo();
         sendDumpsUrl(uploadType.serviceName, postFilesToService(files));
     }
@@ -95,37 +80,77 @@ final class DumpsLogPoster extends BukkitRunnable {
         issuer.sendInfo(MVCorei18n.DUMPS_URL_LIST, "{service}", service, "{link}", url);
     }
 
-    private String postRawDataToMcLogs(@NotNull String rawPasteData) {
-        PasteService pasteService = PasteServiceFactory.getService(PasteServiceType.MCLOGS, true);
-
-        return pasteToService(() -> pasteService.postData(rawPasteData));
-    }
-
     private String postFilesToService(@NotNull Map<String, String> pasteFiles) {
-        PasteService pasteService = PasteServiceFactory.getService(uploadType.pasteServiceType, true);
-
-        return pasteToService(() -> {
-            if (pasteService.supportsMultiFile()) {
-                return pasteService.postData(pasteFiles);
-            } else {
-                return pasteService.postData(this.encodeAsString(pasteFiles));
-            }
-        });
+        PasteService pasteService = PasteServiceFactory.getService(uploadType.pasteServiceType, false);
+        return pasteToService(() -> pasteService.postData(encodePasteAsJson(pasteFiles)));
     }
 
-    private String encodeAsString(Map<String, String> files) {
-        StringBuilder uploadData = new StringBuilder();
-        for (Map.Entry<String, String> entry : files.entrySet()) {
-            String file = entry.getKey();
-            String data = entry.getValue();
-            uploadData.append("# ---------- ")
-                    .append(file)
-                    .append(" ----------\n\n")
-                    .append(data)
-                    .append("\n\n");
+    private String encodePasteAsJson(Map<String, String> files) {
+        JSONObject rootObject = new JSONObject();
+        JSONArray plugins = new JSONArray();
+        JSONArray filesObject = new JSONArray();
+
+        for (Plugin plugin : plugin.getServer().getPluginManager().getPlugins()) {
+            plugins.add(new JSONObject(Map.of(
+                    "name", plugin.getName(),
+                    "version", plugin.getDescription().getVersion(),
+                    "description", Option.of(plugin.getDescription().getDescription()).getOrElse(""),
+                    "authors", plugin.getDescription().getAuthors(),
+                    "website", Option.of(plugin.getDescription().getWebsite()).getOrElse(""),
+                    "enabled", plugin.isEnabled()
+            )));
         }
 
-        return uploadData.toString();
+        for (Map.Entry<String, String> entry : files.entrySet()) {
+            String fileType = "text";
+            if (entry.getKey().endsWith(".yml") || entry.getKey().endsWith(".yaml")) {
+                fileType = "yaml";
+            } else if (entry.getKey().endsWith(".json")) {
+                fileType = "json";
+            } else if (entry.getKey().endsWith(".md")) {
+                fileType = "markdown";
+            } else if (entry.getKey().endsWith(".log")) {
+                fileType = "accesslog";
+            }
+
+            filesObject.add(new JSONObject(Map.of(
+                    "name", entry.getKey(),
+                    "data", entry.getValue(),
+                    "type", fileType
+            )));
+        }
+        rootObject.put("server", new JSONObject(Map.of(
+                "name", plugin.getServer().getName(),
+                "version", plugin.getServer().getVersion(),
+                "bukkitVersion", plugin.getServer().getBukkitVersion(),
+                "onlineMode", plugin.getServer().getOnlineMode(),
+                "javaVersion", Runtime.version().toString(),
+                "operatingSystem", System.getProperty("os.name") + " " + System.getProperty("os.version") + " " + System.getProperty("os.arch"),
+                "uptime", calculateUptimeString(),
+                "memory", "%d free / %d total / %d max".formatted(
+                        toMb(Runtime.getRuntime().freeMemory()),
+                        toMb(Runtime.getRuntime().totalMemory()),
+                        toMb(Runtime.getRuntime().maxMemory()))
+        )));
+
+        rootObject.put("plugins", plugins);
+        rootObject.put("files", filesObject);
+        rootObject.put("createdAt", Instant.now().toString());
+
+        return rootObject.toJSONString();
+    }
+
+    private long toMb(long value) {
+        return value / 1024 / 1024;
+    }
+
+    private String calculateUptimeString() {
+        long uptimeMs = System.currentTimeMillis() - ManagementFactory.getRuntimeMXBean().getStartTime();
+        long totalSeconds = uptimeMs / 1000;
+        long hours = totalSeconds / 3600;
+        long minutes = (totalSeconds % 3600) / 60;
+        long seconds = totalSeconds % 60;
+        return String.format("%d hrs, %d mins, %d sec", hours, minutes, seconds);
     }
 
     private String pasteToService(LogPaster paster) {

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

@@ -5,17 +5,15 @@ 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;
-import org.apache.commons.lang3.StringUtils;
 import org.jetbrains.annotations.NotNull;
 import org.jvnet.hk2.annotations.Service;
 
 import org.mvplugins.multiverse.core.MultiverseCore;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.module.MultiverseModulesRegistry;
-import org.mvplugins.multiverse.core.commands.DumpsLogPoster.LogsType;
 import org.mvplugins.multiverse.core.commands.DumpsLogPoster.UploadType;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
 import org.mvplugins.multiverse.core.event.MVDumpsDebugInfoEvent;
@@ -39,16 +37,12 @@ final class DumpsService {
         this.fileUtils = fileUtils;
     }
 
-    void postLogs(MVCommandIssuer issuer, LogsType logsType, UploadType servicesType, boolean paranoid) {
+    void postLogs(MVCommandIssuer issuer, UploadType servicesType) {
+        issuer.sendInfo(MVCorei18n.DUMPS_STARTING);
+
         // Initialise and add info to the debug event
         MVDumpsDebugInfoEvent versionEvent = createAndCallDebugInfoEvent();
-
-        // Add plugin list if user isn't paranoid
-        if (!paranoid) {
-            versionEvent.putDetailedDebugInfo("plugins.md", "# Plugins\n\n" + getPluginList());
-        }
-
-        new DumpsLogPoster(issuer, logsType, servicesType, paranoid, getLogs(), versionEvent)
+        new DumpsLogPoster(plugin, issuer, servicesType, getLogs(), versionEvent)
                 .runTaskAsynchronously(plugin);
     }
 
@@ -73,18 +67,18 @@ final class DumpsService {
     private @NotNull String readLogsFromFile(Path logsPath) {
         String logs = "Could not read log";
 
-        // Try reading as ANSI encoded
+        // Try reading as UTF-8 first
         try {
             logs = Files.readString(logsPath, StandardCharsets.UTF_8);
         } catch (IOException e) {
-            Logging.severe("Could not read logs/latest.log. See below for stack trace");
+            Logging.severe("Could not read logs/latest.log as UTF-8. Trying ISO-8859-1. See below for stack trace");
             e.printStackTrace();
 
             try {
-                logs = Files.readString(logsPath, StandardCharsets.UTF_8);
+                logs = Files.readString(logsPath, StandardCharsets.ISO_8859_1);
             } catch (IOException ex) {
                 // It is some other strange encoding
-                Logging.severe("Could not read ./logs/latest.log. See below for stack trace");
+                Logging.severe("Could not read ./logs/latest.log as ISO-8859-1. See below for stack trace");
                 ex.printStackTrace();
             }
         }
@@ -92,15 +86,6 @@ final class DumpsService {
         return logs;
     }
 
-    private String getDebugInfoString() {
-        return "# Multiverse-Core Version info" + "\n\n"
-                + " - Multiverse-Core Version: " + this.plugin.getDescription().getVersion() + '\n'
-                + " - Bukkit Version: " + this.plugin.getServer().getVersion() + '\n'
-                + " - Loaded Worlds: " + worldManager.getLoadedWorlds() + '\n'
-                + " - Multiverse Plugins Loaded: " + StringFormatter.joinAnd(MultiverseModulesRegistry.get().getRegisteredPlugins()) + '\n'
-                + " - Multiverse Plugins Count: " + MultiverseModulesRegistry.get().getPluginCount() + '\n';
-    }
-
     private MVDumpsDebugInfoEvent createAndCallDebugInfoEvent() {
         MVDumpsDebugInfoEvent event = new MVDumpsDebugInfoEvent();
         addDebugInfoToEvent(event);
@@ -112,34 +97,63 @@ final class DumpsService {
         // Add the legacy file, but as markdown, so it's readable
         event.putDetailedDebugInfo("version.md", this.getDebugInfoString());
 
-        // add config.yml
-        File configFile = new File(plugin.getDataFolder(), "config.yml");
-        event.putDetailedDebugInfo("Multiverse-Core/config.yml", configFile);
-
-        // add worlds.yml
-        File worldsFile = new File(plugin.getDataFolder(), "worlds.yml");
-        event.putDetailedDebugInfo("Multiverse-Core/worlds.yml", worldsFile);
-
-        // Add bukkit.yml if we found it
-        if (fileUtils.getBukkitConfig() != null) {
-            event.putDetailedDebugInfo(fileUtils.getBukkitConfig().getPath(), fileUtils.getBukkitConfig());
-        } else {
-            Logging.warning("/mv dumps could not find bukkit.yml. Not including file");
-        }
-
         // Add server.properties if we found it
         if (fileUtils.getServerProperties() != null) {
-            event.putDetailedDebugInfo(fileUtils.getServerProperties().getPath(), fileUtils.getServerProperties());
+            event.putDetailedDebugInfo(fileUtils.getServerProperties().getName(), fileUtils.getServerProperties());
         } else {
             Logging.warning("/mv dumps could not find server.properties. Not including file");
         }
 
+        // Add bukkit.yml if we found it
+        if (fileUtils.getBukkitConfig() != null) {
+            event.putDetailedDebugInfo(fileUtils.getBukkitConfig().getName(), fileUtils.getBukkitConfig());
+        } else {
+            Logging.warning("/mv dumps could not find bukkit.yml. Not including file");
+        }
+
+        // Add spigot.yml
+        File spigotYml = fileUtils.getServerFolder().toPath().resolve("spigot.yml").toFile();
+        if (spigotYml.isFile()) {
+            event.putDetailedDebugInfo(spigotYml.getName(), spigotYml);
+        } else {
+            Logging.warning("/mv dumps could not find spigot.yml. Not including file");
+        }
+
+        // Add paper-global.yml
+        File paperGlobalYml = fileUtils.getServerFolder().toPath().resolve("config/paper-global.yml").toFile();
+        if (paperGlobalYml.isFile()) {
+            event.putDetailedDebugInfo(paperGlobalYml.getName(), paperGlobalYml);
+        } else {
+            Logging.warning("/mv dumps could not find paper-global.yml. Not including file");
+        }
+
+        // add paper-world-defaults.yml
+        File paperWorldDefaultsYml = fileUtils.getServerFolder().toPath().resolve("config/paper-world-defaults.yml").toFile();
+        if (paperWorldDefaultsYml.isFile()) {
+            event.putDetailedDebugInfo(paperWorldDefaultsYml.getName(), paperWorldDefaultsYml);
+        } else {
+            Logging.warning("/mv dumps could not find paper-global.yml. Not including file");
+        }
+
+        // add multiverse-core config.yml
+        File configFile = new File(plugin.getDataFolder(), "config.yml");
+        event.putDetailedDebugInfo("multiverse-core/config.yml", configFile);
+
+        // add multiverse-core worlds.yml
+        File worldsFile = new File(plugin.getDataFolder(), "worlds.yml");
+        event.putDetailedDebugInfo("multiverse-core/worlds.yml", worldsFile);
+
+        // add multiverse-core anchors.yml
+        File anchorsFile = new File(plugin.getDataFolder(), "anchors.yml");
+        event.putDetailedDebugInfo("multiverse-core/anchors.yml", anchorsFile);
     }
 
-    private String getPluginList() {
-        return " - " + StringUtils.join(Arrays.stream(plugin.getServer().getPluginManager().getPlugins())
-                .map(Object::toString)
-                .sorted()
-                .toList(), "\n - ");
+    private String getDebugInfoString() {
+        return "# Multiverse-Core Version info" + "\n\n"
+                + " - Multiverse-Core Version: " + this.plugin.getDescription().getVersion() + '\n'
+                + " - Bukkit Version: " + this.plugin.getServer().getVersion() + '\n'
+                + " - Loaded Worlds: " + worldManager.getLoadedWorlds() + '\n'
+                + " - Multiverse Plugins Loaded: " + StringFormatter.joinAnd(MultiverseModulesRegistry.get().getRegisteredPlugins()) + '\n'
+                + " - Multiverse Plugins Count: " + MultiverseModulesRegistry.get().getPluginCount() + '\n';
     }
 }

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

@@ -21,7 +21,9 @@ import org.mvplugins.multiverse.core.display.ContentDisplay;
 import org.mvplugins.multiverse.core.display.filters.DefaultContentFilter;
 import org.mvplugins.multiverse.core.display.handlers.PagedSendHandler;
 import org.mvplugins.multiverse.core.display.parsers.ListContentProvider;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.utils.StringFormatter;
 import org.mvplugins.multiverse.core.world.MultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
@@ -31,6 +33,8 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
 @Service
 @Subcommand("entity-spawn-config")
 final class EntitySpawnConfigCommand extends CoreCommand {
@@ -64,21 +68,26 @@ final class EntitySpawnConfigCommand extends CoreCommand {
         ContentDisplay.create()
                 .addContent(ListContentProvider.forContent(getEntitySpawnConfigList(world)))
                 .withSendHandler(PagedSendHandler.create()
-                        .withHeader(Message.of("==== [ Entity Spawn Config '" + world.getName() + "' ] ===="))
+                        .withHeader(Message.of(MVCorei18n.ENTITYSPAWNCONFIG_INFO_HEADER,
+                                Replace.WORLD.with(world.getName())))
                         .withLinesPerPage(8)
                         .withTargetPage(parsedFlags.flagValue(flags.page, 1))
                         .withFilter(parsedFlags.flagValue(flags.filter, DefaultContentFilter.get())))
                 .send(issuer);
     }
 
-    private List<String> getEntitySpawnConfigList(MultiverseWorld world) {
-        List<String> list = new ArrayList<>();
+    private List<Message> getEntitySpawnConfigList(MultiverseWorld world) {
+        List<Message> list = new ArrayList<>();
         Arrays.stream(SpawnCategory.values()).forEach(spawnCategory -> {
-            list.add(spawnCategory.name() + ": ");
+            list.add(Message.of(MVCorei18n.ENTITYSPAWNCONFIG_INFO_CATEGORY,
+                    replace("{category}").with(spawnCategory.name())));
             SpawnCategoryConfig spawnCategoryConfig = world.getEntitySpawnConfig().getSpawnCategoryConfig(spawnCategory);
-            list.add("  spawn: " + spawnCategoryConfig.isSpawn());
-            list.add("  tick-rate: " + spawnCategoryConfig.getTickRate());
-            list.add("  exceptions: " + StringFormatter.join(spawnCategoryConfig.getExceptions(), ", "));
+            list.add(Message.of(MVCorei18n.ENTITYSPAWNCONFIG_INFO_SPAWN,
+                    replace("{spawn}").with(spawnCategoryConfig.isSpawn())));
+            list.add(Message.of(MVCorei18n.ENTITYSPAWNCONFIG_INFO_TICKRATE,
+                    replace("{tickRate}").with(spawnCategoryConfig.getTickRate())));
+            list.add(Message.of(MVCorei18n.ENTITYSPAWNCONFIG_INFO_EXCEPTIONS,
+                    replace("{exceptions}").with(StringFormatter.join(spawnCategoryConfig.getExceptions(), ", "))));
         });
         return list;
     }
@@ -114,9 +123,16 @@ final class EntitySpawnConfigCommand extends CoreCommand {
                 .getStringPropertyHandle()
                 .modifyPropertyString(property, value, action)
                 .andThenTry(worldManager::saveWorldsConfig)
-                .onSuccess(ignore -> issuer.sendInfo("Successfully set " + property + " to " + value
-                        + " for " + spawnCategory.name() + " in " + world.getName()))
-                .onFailure(e -> issuer.sendError("Unable to set " + property + " to " + value
-                        + " for " + spawnCategory.name() + " in " + world.getName() + ": " + e.getMessage()));
+                .onSuccess(ignore -> issuer.sendInfo(MVCorei18n.ENTITYSPAWNCONFIG_MODIFY_SUCCESS,
+                        replace("{property}").with(property),
+                        Replace.VALUE.with(value),
+                        replace("{category}").with(spawnCategory.name()),
+                        Replace.WORLD.with(world.getName())))
+                .onFailure(e -> issuer.sendError(MVCorei18n.ENTITYSPAWNCONFIG_MODIFY_FAILURE,
+                        replace("{property}").with(property),
+                        Replace.VALUE.with(value),
+                        replace("{category}").with(spawnCategory.name()),
+                        Replace.WORLD.with(world.getName()),
+                        Replace.ERROR.with(e)));
     }
 }

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

@@ -54,21 +54,21 @@ class GameruleCommand extends CoreCommand {
     @Subcommand("gamerule|rule set")
     @CommandPermission("multiverse.core.gamerule.set")
     @CommandCompletion("@gamerules @gamerulesvalues @mvworlds:multiple|*")
-    @Syntax("<Gamerule> <Gamerule value> [World or *]")
+    @Syntax("<gamerule> <value> [worlds|*]")
     @Description("{@@mv-core.gamerule.set.description}")
     void onGameruleSetCommand(
             MVCommandIssuer issuer,
 
-            @Syntax("<Gamerule>")
+            @Syntax("<gamerule>")
             @Description("{@@mv-core.gamerule.set.gamerule.description}")
             GameRule gamerule,
 
-            @Syntax("<Value>")
+            @Syntax("<value>")
             @Description("{@@mv-core.gamerule.set.value.description}")
             GameRuleValue gameRuleValue,
 
             @Flags("resolve=issuerAware,maxArgForAware=2")
-            @Syntax("[World or *]")
+            @Syntax("[worlds|*]")
             @Description("{@@mv-core.gamerule.set.world.description}")
             LoadedMultiverseWorld[] worlds) {
         Object value = gameRuleValue.value();
@@ -105,17 +105,17 @@ class GameruleCommand extends CoreCommand {
     @Subcommand("gamerule|rule reset")
     @CommandPermission("multiverse.core.gamerule.set")
     @CommandCompletion("@gamerules @mvworlds:multiple|*")
-    @Syntax("<Gamerule> [World or *]")
+    @Syntax("<gamerule> [worlds|*]")
     @Description("{@@mv-core.gamerule.reset.description}")
     void onGameruleResetCommand(
             MVCommandIssuer issuer,
 
-            @Syntax("<Gamerule>")
+            @Syntax("<gamerule>")
             @Description("{@@mv-core.gamerule.reset.gamerule.description}")
             GameRule gamerule,
 
             @Flags("resolve=issuerAware,maxArgForAware=1")
-            @Syntax("[World or *]")
+            @Syntax("[worlds|*]")
             @Description("{@@mv-core.gamerule.reset.world.description}")
             LoadedMultiverseWorld[] worlds) {
         AtomicBoolean success = new AtomicBoolean(true);
@@ -153,7 +153,7 @@ class GameruleCommand extends CoreCommand {
             MVCommandIssuer issuer,
 
             @Flags("resolve=issuerAware,maxArgForAware=0")
-            @Syntax("<world>")
+            @Syntax("[world]")
             @Description("{@@mv-core.gamerule.list.description.world}")
             LoadedMultiverseWorld world,
 

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

@@ -10,7 +10,6 @@ import co.aikar.commands.annotation.Optional;
 import co.aikar.commands.annotation.Subcommand;
 import co.aikar.commands.annotation.Syntax;
 import jakarta.inject.Inject;
-import org.bukkit.ChatColor;
 import org.jetbrains.annotations.NotNull;
 import org.jvnet.hk2.annotations.Service;
 
@@ -23,10 +22,13 @@ import org.mvplugins.multiverse.core.display.filters.DefaultContentFilter;
 import org.mvplugins.multiverse.core.display.handlers.PagedSendHandler;
 import org.mvplugins.multiverse.core.display.parsers.ListContentProvider;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
 import org.mvplugins.multiverse.core.utils.StringFormatter;
 import org.mvplugins.multiverse.core.world.generators.GeneratorPlugin;
 import org.mvplugins.multiverse.core.world.generators.GeneratorProvider;
 
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
 /**
  * List all gamerules in your current or specified world.
  */
@@ -68,7 +70,7 @@ class GeneratorsCommand extends CoreCommand {
         ContentDisplay.create()
                 .addContent(ListContentProvider.forContent(generators))
                 .withSendHandler(PagedSendHandler.create()
-                        .withHeader("%s====[ Multiverse Generator List ]====", ChatColor.AQUA)
+                        .withHeader(Message.of(MVCorei18n.GENERATORS_HEADER))
                         .doPagination(true)
                         .withTargetPage(parsedFlags.flagValue(flags.page, 1))
                         .withFilter(parsedFlags.flagValue(flags.filter, DefaultContentFilter.get())))
@@ -85,10 +87,13 @@ class GeneratorsCommand extends CoreCommand {
             @Syntax("<generator>")
             GeneratorPlugin generatorPlugin
     ) {
-        issuer.sendMessage(ChatColor.RESET + "Generator Plugin: " + generatorPlugin.getPluginName());
-        issuer.sendMessage(ChatColor.RESET + "Example usages: ");
-        issuer.sendMessage(ChatColor.RESET + StringFormatter.join(generatorPlugin.getExampleUsages(), "\n"));
-        issuer.sendMessage(ChatColor.RESET + "Link to more info: " + generatorPlugin.getInfoLink());
+        issuer.sendMessage(MVCorei18n.GENERATORS_INFO_PLUGIN,
+                replace("{plugin}").with(generatorPlugin.getPluginName()));
+        issuer.sendMessage(MVCorei18n.GENERATORS_INFO_EXAMPLEUSAGES);
+        issuer.sendMessage(MVCorei18n.GENERATORS_INFO_USAGES,
+                replace("{usages}").with(StringFormatter.join(generatorPlugin.getExampleUsages(), "\n")));
+        issuer.sendMessage(MVCorei18n.GENERATORS_INFO_INFOLINK,
+                replace("{link}").with(generatorPlugin.getInfoLink()));
     }
 
     @Service

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

@@ -43,22 +43,24 @@ class ImportCommand extends CoreCommand {
     @Subcommand("import")
     @CommandPermission("multiverse.core.import")
     @CommandCompletion("@mvworlds:scope=potential @environments @flags:groupName=" + Flags.NAME)
-    @Syntax("<name> <environment> [--generator <generator[:id]> --adjust-spawn --biome <biome>]")
+    @Syntax("<name> <environment> [--generator <generator[:id]> --no-adjust-spawn --biome <biome> " +
+            "--skip-folder-check --generator-settings <json-settings>]")
     @Description("{@@mv-core.import.description}")
     void onImportCommand(
             MVCommandIssuer issuer,
 
-            @Conditions("worldname:scope=new")
+            // @Conditions("worldname:scope=new")
             @Syntax("<name>")
             @Description("{@@mv-core.import.name.description}")
             String worldName,
 
-            @Syntax("<env>")
+            @Syntax("<environment>")
             @Description("{@@mv-core.import.env.description}")
             World.Environment environment,
 
             @Optional
-            @Syntax("[--generator <generator[:id]> --adjust-spawn --biome <biome>]")
+            @Syntax("[--generator <generator[:id]> --no-adjust-spawn --biome <biome> " +
+                    "--skip-folder-check --generator-settings <json-settings>]")
             @Description("{@@mv-core.import.other.description}")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
@@ -67,7 +69,8 @@ class ImportCommand extends CoreCommand {
         worldManager.importWorld(ImportWorldOptions.worldName(worldName)
                         .biome(parsedFlags.flagValue(flags.biome, ""))
                         .environment(environment)
-                        .generator(parsedFlags.flagValue(flags.generator, String.class))
+                        .generator(parsedFlags.flagValue(flags.generator))
+                        .generatorSettings(parsedFlags.flagValue(flags.generatorSettings, ""))
                         .useSpawnAdjust(!parsedFlags.hasFlag(flags.noAdjustSpawn))
                         .doFolderCheck(!parsedFlags.hasFlag(flags.skipFolderCheck)))
                 .onSuccess(newWorld -> {
@@ -110,6 +113,11 @@ class ImportCommand extends CoreCommand {
         private final CommandFlag skipFolderCheck = flag(CommandFlag.builder("--skip-folder-check")
                 .addAlias("-f")
                 .build());
+
+        private final CommandValueFlag<String> generatorSettings = flag(CommandValueFlag
+                .builder("--generator-settings", String.class)
+                .addAlias("-gs")
+                .build());
     }
 
     @Service

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

@@ -87,6 +87,7 @@ class InfoCommand extends CoreCommand {
     private Map<String, String> getInfo(LoadedMultiverseWorld world) {
         Map<String, String> outMap = new LinkedHashMap<>();
 
+        outMap.put("World Key", world.getKey().toString());
         outMap.put("World Name", world.getName());
         outMap.put("World Alias", world.getAlias());
         outMap.put("World UID", world.getUID().toString());
@@ -103,6 +104,7 @@ class InfoCommand extends CoreCommand {
         outMap.put("World Type", world.getWorldType().map(WorldType::getName).getOrNull());
         outMap.put("Biome", world.getBiome());
         outMap.put("Generator", world.getGenerator());
+        outMap.put("Generator Settings",  world.getGeneratorSettings());
         outMap.put("Generate Structures", world.canGenerateStructures().map(String::valueOf).getOrNull());
 
         outMap.put("Auto Load", String.valueOf(world.isAutoLoad()));
@@ -112,13 +114,12 @@ class InfoCommand extends CoreCommand {
         outMap.put("World Scale", String.valueOf(world.getScale()));
         outMap.put("Weather Enabled", String.valueOf(world.isAllowWeather()));
         outMap.put("Allow Flight", String.valueOf(world.isAllowFlight()));
+        outMap.put("Grant Advancements", String.valueOf(world.isAllowAdvancementGrant()));
+        outMap.put("Auto Heal", String.valueOf(world.getAutoHeal()));
         outMap.put("Hunger Depletes", String.valueOf(world.isHunger()));
-        outMap.put("Keep Spawn In Memory", String.valueOf(world.isKeepSpawnInMemory()));
         outMap.put("PVP Enabled", String.valueOf(world.getPvp()));
         outMap.put("Portal Form", String.valueOf(world.getPortalForm()));
         outMap.put("Player Limit", String.valueOf(world.getPlayerLimit()));
-//        getAnimalSpawningInfo(outMap, world);
-//        getMonsterSpawningInfo(outMap, world);
         outMap.put("World Blacklist", String.join(", ", world.getWorldBlacklist()));
 
         return outMap;
@@ -135,30 +136,6 @@ class InfoCommand extends CoreCommand {
         }
     }
 
-//    private void getAnimalSpawningInfo(Map<String, String> outMap, MultiverseWorld world) {
-//        if (world.isSpawningAnimals()) {
-//            outMap.put("Spawning Animals", "ALL");
-//        } else {
-//            if (!world.getSpawningAnimalsExceptions().isEmpty()) {
-//                outMap.put("Spawning Animals", world.getSpawningAnimalsExceptions().toString());
-//            } else {
-//                outMap.put("Spawning Animals", "NONE");
-//            }
-//        }
-//    }
-//
-//    private void getMonsterSpawningInfo(Map<String, String> outMap, MultiverseWorld world) {
-//        if (world.isSpawningMonsters()) {
-//            outMap.put("Spawning Monsters", "ALL");
-//        } else {
-//            if (!world.getSpawningMonstersExceptions().isEmpty()) {
-//                outMap.put("Spawning Monsters", world.getSpawningMonstersExceptions().toString());
-//            } else {
-//                outMap.put("Spawning Monsters", "NONE");
-//            }
-//        }
-//    }
-
     @Service
     private static final class LegacyAlias extends InfoCommand implements LegacyAliasCommand {
         @Inject

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

@@ -54,12 +54,12 @@ class ListCommand extends CoreCommand {
     @Subcommand("list")
     @CommandPermission("multiverse.core.list.worlds")
     @CommandCompletion("@flags:groupName=" + Flags.NAME)
-    @Syntax("--filter [filter] --page [page] --raw")
+    @Syntax("[--filter <filter>] [--page <page>] [--raw]")
     @Description("{{@mv-core.list.description}}")
     public void onListCommand(
             MVCommandIssuer issuer,
 
-            @Syntax("[--filter <filter>] [--page <page>]")
+            @Syntax("[--filter <filter>] [--page <page>] [--raw]")
             @Description("Filters the list of worlds by the given regex and displays the given page.")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);

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

@@ -39,7 +39,7 @@ class LoadCommand extends CoreCommand {
     @Subcommand("load")
     @CommandPermission("multiverse.core.load")
     @CommandCompletion("@mvworlds:scope=unloaded @flags:groupName=" + Flags.NAME)
-    @Syntax("<world>")
+    @Syntax("<world> [--skip-folder-check]")
     @Description("{@@mv-core.load.description}")
     void onLoadCommand(
             MVCommandIssuer issuer,

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

@@ -0,0 +1,121 @@
+package org.mvplugins.multiverse.core.commands;
+
+import co.aikar.commands.annotation.CommandCompletion;
+import co.aikar.commands.annotation.CommandPermission;
+import co.aikar.commands.annotation.Description;
+import co.aikar.commands.annotation.Flags;
+import co.aikar.commands.annotation.Optional;
+import co.aikar.commands.annotation.Single;
+import co.aikar.commands.annotation.Subcommand;
+import co.aikar.commands.annotation.Syntax;
+import jakarta.inject.Inject;
+import org.bukkit.ChatColor;
+import org.jetbrains.annotations.NotNull;
+import org.jvnet.hk2.annotations.Service;
+import org.mvplugins.multiverse.core.command.MVCommandIssuer;
+import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
+import org.mvplugins.multiverse.core.command.flags.PageFilterFlags;
+import org.mvplugins.multiverse.core.display.ContentDisplay;
+import org.mvplugins.multiverse.core.display.filters.DefaultContentFilter;
+import org.mvplugins.multiverse.core.display.handlers.PagedSendHandler;
+import org.mvplugins.multiverse.core.display.parsers.MapContentProvider;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
+import org.mvplugins.multiverse.core.world.MultiverseWorld;
+import org.mvplugins.multiverse.core.world.WorldManager;
+
+import java.util.Locale;
+
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
+@Service
+@Subcommand("meta")
+final class MetaCommand extends CoreCommand {
+
+    private final WorldManager worldManager;
+    private final PageFilterFlags flags;
+
+    @Inject
+    MetaCommand(@NotNull WorldManager worldManager, @NotNull PageFilterFlags flags) {
+        this.worldManager = worldManager;
+        this.flags = flags;
+    }
+
+    @Subcommand("info")
+    @CommandPermission("multiverse.core.meta.info")
+    @CommandCompletion("@mvworlds:scope=both|@flags:resolveUntil=arg1,groupName=" + PageFilterFlags.NAME + " " +
+            "@flags:groupName=" + PageFilterFlags.NAME)
+    @Syntax("[world] [--page <page>] [--filter <filter>]")
+    @Description("{@@mv-core.meta.info.description}")
+    void infoCommand(
+            MVCommandIssuer issuer,
+
+            @Flags("resolve=issuerAware,maxArgForAware=0")
+            @Syntax("[world]")
+            @Description("{@@mv-core.meta.info.world.description}")
+            MultiverseWorld world,
+
+            @Optional
+            @Syntax("[--page <page>] [--filter <filter>]")
+            String[] flagArray
+    ) {
+        ParsedCommandFlags parsedFlags = flags.parse(flagArray);
+        ContentDisplay.create()
+                .addContent(MapContentProvider.forContent(world.getAllMeta())
+                        .withKeyColor(ChatColor.AQUA)
+                        .withValueColor(ChatColor.WHITE))
+                .withSendHandler(PagedSendHandler.create()
+                        .withHeader(Message.of(MVCorei18n.META_INFO_HEADER, replace("{world}").with(world.getName())))
+                        .noContentMessage(Message.of(MVCorei18n.META_INFO_NOCONTENT, replace("{world}").with(world.getName())))
+                        .withTargetPage(parsedFlags.flagValue(flags.page, 1))
+                        .withFilter(parsedFlags.flagValue(flags.filter, DefaultContentFilter.get())))
+                .send(issuer);
+    }
+
+    @Subcommand("modify")
+    @CommandPermission("multiverse.core.meta.modify")
+    @CommandCompletion("@mvworlds:scope=both set|remove @mvworldmetakey @empty")
+    @Syntax("[world] <set|remove> <key> [value]")
+    void modifyCommand(
+            MVCommandIssuer issuer,
+
+            @Flags("resolve=issuerAware,maxArgForAware=4")
+            @Syntax("[world]")
+            MultiverseWorld world,
+
+            @Syntax("<set|remove>")
+            String action,
+
+            @Syntax("<key>")
+            String key,
+
+            @Optional
+            @Single
+            @Syntax("[value]")
+            String value
+    ) {
+        switch (action.toLowerCase(Locale.ROOT)) {
+            case "set" -> world.setMeta(key, value)
+                    .onSuccess(ignore -> issuer.sendInfo(MVCorei18n.META_MODIFY_SET_SUCCESS,
+                                    replace("{key}").with(key),
+                                    replace("{value}").with(value),
+                                    Replace.WORLD.with(world.getName())))
+                    .onFailure(throwable -> issuer.sendError(MVCorei18n.META_MODIFY_SET_FAILURE,
+                            replace("{key}").with(key),
+                            replace("{value}").with(value),
+                            Replace.WORLD.with(world.getName()),
+                            Replace.ERROR.with(throwable)));
+            case "remove" -> world.removeMeta(key)
+                    .onSuccess(ignore -> issuer.sendInfo(MVCorei18n.META_MODIFY_REMOVE_SUCCESS,
+                            replace("{key}").with(key),
+                            Replace.WORLD.with(world.getName())))
+                    .onFailure(throwable -> issuer.sendError(MVCorei18n.META_MODIFY_REMOVE_FAILURE,
+                            replace("{key}").with(key),
+                            Replace.WORLD.with(world.getName()),
+                            Replace.ERROR.with(throwable)));
+            default -> issuer.sendError(MVCorei18n.META_MODIFY_INVALIDACTION, replace("{action}").with(action));
+        }
+        worldManager.saveWorldsConfig();
+    }
+}

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

@@ -107,14 +107,14 @@ class ModifyCommand extends CoreCommand {
                                 replace("{action}").with(action.name().toLowerCase()),
                                 replace("{property}").with(propertyName),
                                 Replace.WORLD.with(world.getName()),
-                                Replace.ERROR.with(exception.getMessage()));
+                                Replace.ERROR.with(exception));
                     } 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.ERROR.with(exception));
                     }
         });
     }

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

@@ -10,12 +10,16 @@ import jakarta.inject.Inject;
 import org.bukkit.entity.SpawnCategory;
 import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
+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.world.LoadedMultiverseWorld;
 import org.mvplugins.multiverse.core.world.entity.EntityPurger;
 
 import java.util.List;
 
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
 @Service
 final class PurgeAllEntitiesCommand extends CoreCommand {
 
@@ -43,12 +47,16 @@ final class PurgeAllEntitiesCommand extends CoreCommand {
     ) {
         if (spawnCategories == null || spawnCategories.length == 0) {
             int purgeCount = entityPurger.purgeAllEntities(world);
-            issuer.sendMessage("Successfully purged " + purgeCount + " entities in world " + world.getName() + ".");
+            issuer.sendMessage(MVCorei18n.PURGEALLENTITIES_SUCCESS,
+                    Replace.COUNT.with(purgeCount),
+                    Replace.WORLD.with(world.getName()));
             return;
         }
 
         int purgeCount = entityPurger.purgeEntities(world, spawnCategories);
-        issuer.sendMessage("Successfully purged " + purgeCount + " entities in world " + world.getName() +
-                " for spawn categories " + StringFormatter.join(List.of(spawnCategories), ", ") + ".");
+        issuer.sendMessage(MVCorei18n.PURGEALLENTITIES_SUCCESS_CATEGORIES,
+                Replace.COUNT.with(purgeCount),
+                Replace.WORLD.with(world.getName()),
+                replace("{categories}").with(StringFormatter.join(List.of(spawnCategories), ", ")));
     }
 }

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

@@ -8,6 +8,8 @@ import co.aikar.commands.annotation.Syntax;
 import jakarta.inject.Inject;
 import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 import org.mvplugins.multiverse.core.world.entity.EntityPurger;
 
@@ -33,6 +35,8 @@ final class PurgeEntitiesCommand extends CoreCommand {
             LoadedMultiverseWorld world
     ) {
         int purgeCount = entityPurger.purgeEntities(world);
-        issuer.sendMessage("Successfully purged " + purgeCount + " entities in world " + world.getName() + ".");
+        issuer.sendMessage(MVCorei18n.PURGEENTITIES_SUCCESS,
+                Replace.COUNT.with(purgeCount),
+                Replace.WORLD.with(world.getName()));
     }
 }

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

@@ -2,6 +2,7 @@ package org.mvplugins.multiverse.core.commands;
 
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
 
 import co.aikar.commands.ACFUtil;
 import co.aikar.commands.annotation.CommandAlias;
@@ -23,9 +24,12 @@ import org.mvplugins.multiverse.core.command.flag.CommandFlag;
 import org.mvplugins.multiverse.core.command.flag.CommandFlagsManager;
 import org.mvplugins.multiverse.core.command.flag.CommandValueFlag;
 import org.mvplugins.multiverse.core.command.flag.ParsedCommandFlags;
-import org.mvplugins.multiverse.core.command.flags.RemovePlayerFlags;
+import org.mvplugins.multiverse.core.command.flags.RemovePlayerDestinationFlags;
 import org.mvplugins.multiverse.core.command.queue.CommandQueueManager;
 import org.mvplugins.multiverse.core.command.queue.CommandQueuePayload;
+import org.mvplugins.multiverse.core.destination.DestinationInstance;
+import org.mvplugins.multiverse.core.destination.DestinationsProvider;
+import org.mvplugins.multiverse.core.destination.core.WorldDestination;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.Message;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
@@ -65,7 +69,8 @@ class RegenCommand extends CoreCommand {
     @Subcommand("regen")
     @CommandPermission("multiverse.core.regen")
     @CommandCompletion("@mvworlds:scope=loaded @flags:groupName=" + Flags.NAME)
-    @Syntax("<world> [--seed [seed] --reset-world-config --reset-gamerules --reset-world-border --remove-players]")
+    @Syntax("<world> [--seed [seed]] [--reset-world-config] [--reset-gamerules] [--reset-world-border] " +
+            "[--keep-files <files>] [--remove-players [destination]]")
     @Description("{@@mv-core.regen.description}")
     void onRegenCommand(
             MVCommandIssuer issuer,
@@ -75,7 +80,8 @@ class RegenCommand extends CoreCommand {
             LoadedMultiverseWorld world,
 
             @Optional
-            @Syntax("[--seed [seed] --reset-world-config --reset-gamerules --reset-world-border --remove-players]")
+            @Syntax("[--seed [seed]] [--reset-world-config] [--reset-gamerules] [--reset-world-border] " +
+                    "[--keep-files <files>] [--remove-players [destination]]")
             @Description("{@@mv-core.regen.other.description}")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
@@ -83,7 +89,7 @@ class RegenCommand extends CoreCommand {
         commandQueueManager.addToQueue(CommandQueuePayload
                 .issuer(issuer)
                 .action(() -> runRegenCommand(issuer, world, parsedFlags))
-                .prompt(Message.of(MVCorei18n.REGEN_PROMPT, "",
+                .prompt(Message.of(MVCorei18n.REGEN_PROMPT,
                         Replace.WORLD.with(world.getName()))));
     }
 
@@ -91,14 +97,15 @@ class RegenCommand extends CoreCommand {
         issuer.sendInfo(MVCorei18n.REGEN_REGENERATING, Replace.WORLD.with(world.getName()));
         List<Player> worldPlayers = world.getPlayers().getOrElse(Collections.emptyList());
 
-        var future = parsedFlags.hasFlag(flags.removePlayers)
-                ? playerWorldTeleporter.removeFromWorld(world)
+        DestinationInstance<?, ?> removeToDestination = parsedFlags.flagValue(flags.removePlayers);
+        var future = Objects.nonNull(removeToDestination)
+                ? playerWorldTeleporter.transferAllFromWorldToDestination(world,  removeToDestination)
                 : AsyncAttemptsAggregate.emptySuccess();
 
         // todo: using future will hide stacktrace
         future.onSuccess(() -> worldTickDeferrer
                         .deferWorldTick(() -> doWorldRegening(issuer, world, parsedFlags, worldPlayers)))
-                .onFailure(() -> issuer.sendError("Failed to teleport one or more players out of the world!"));
+                .onFailure(() -> issuer.sendError(MVCorei18n.GENERIC_TELEPORTPLAYERS_FAILED));
     }
 
     private void doWorldRegening(
@@ -128,13 +135,18 @@ class RegenCommand extends CoreCommand {
     }
 
     @Service
-    private static final class Flags extends RemovePlayerFlags {
+    private static final class Flags extends RemovePlayerDestinationFlags {
 
         private static final String NAME = "mvregen";
 
         @Inject
-        private Flags(@NotNull CommandFlagsManager flagsManager) {
-            super(NAME, flagsManager);
+        private Flags(
+                @NotNull CommandFlagsManager flagsManager,
+                @NotNull WorldManager worldManager,
+                @NotNull DestinationsProvider destinationsProvider,
+                @NotNull WorldDestination worldDestination
+        ) {
+            super(NAME, flagsManager, worldManager, destinationsProvider, worldDestination);
         }
 
         private final CommandValueFlag<String> seed = flag(CommandValueFlag.builder("--seed", String.class)

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

@@ -14,11 +14,13 @@ 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.command.flags.RemovePlayerDestinationFlags;
+import org.mvplugins.multiverse.core.destination.DestinationInstance;
+import org.mvplugins.multiverse.core.destination.DestinationsProvider;
+import org.mvplugins.multiverse.core.destination.core.WorldDestination;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.utils.result.AsyncAttemptsAggregate;
@@ -27,6 +29,8 @@ import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.helpers.PlayerWorldTeleporter;
 import org.mvplugins.multiverse.core.world.options.RemoveWorldOptions;
 
+import java.util.Objects;
+
 @Service
 class RemoveCommand extends CoreCommand {
 
@@ -48,7 +52,7 @@ class RemoveCommand extends CoreCommand {
     @Subcommand("remove")
     @CommandPermission("multiverse.core.remove")
     @CommandCompletion("@mvworlds:scope=both @flags:groupName=" + Flags.NAME)
-    @Syntax("<world>")
+    @Syntax("<world> [--remove-players [destination]] [--no-unload-bukkit-world] [--no-save]")
     @Description("{@@mv-core.remove.description}")
     void onRemoveCommand(
             MVCommandIssuer issuer,
@@ -58,17 +62,20 @@ class RemoveCommand extends CoreCommand {
             MultiverseWorld world,
 
             @Optional
-            @Syntax("[--remove-players]")
+            @Syntax("[--remove-players [destination]] [--no-unload-bukkit-world] [--no-save]")
             @Description("")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
 
-        var future = parsedFlags.hasFlag(flags.removePlayers)
-                ? worldManager.getLoadedWorld(world).map(playerWorldTeleporter::removeFromWorld).getOrElse(AsyncAttemptsAggregate::emptySuccess)
+        DestinationInstance<?, ?> removeToDestination = parsedFlags.flagValue(flags.removePlayers);
+        var future = Objects.nonNull(removeToDestination)
+                ? world.asLoadedWorld()
+                  .map(loadedWorld -> playerWorldTeleporter.transferAllFromWorldToDestination(loadedWorld, removeToDestination))
+                  .getOrElse(AsyncAttemptsAggregate::emptySuccess)
                 : AsyncAttemptsAggregate.emptySuccess();
 
         future.onSuccess(() -> doWorldRemoving(issuer, world, parsedFlags))
-                .onFailure(() -> issuer.sendError("Failed to teleport one or more players out of the world!"));
+                .onFailure(() -> issuer.sendError(MVCorei18n.GENERIC_TELEPORTPLAYERS_FAILED));
     }
 
     private void doWorldRemoving(MVCommandIssuer issuer, MultiverseWorld world, ParsedCommandFlags parsedFlags) {
@@ -85,13 +92,18 @@ class RemoveCommand extends CoreCommand {
     }
 
     @Service
-    private static final class Flags extends RemovePlayerFlags {
+    private static final class Flags extends RemovePlayerDestinationFlags {
 
         private static final String NAME = "mvremove";
 
         @Inject
-        private Flags(@NotNull CommandFlagsManager flagsManager) {
-            super(NAME, flagsManager);
+        private Flags(
+                @NotNull CommandFlagsManager flagsManager,
+                @NotNull WorldManager worldManager,
+                @NotNull DestinationsProvider destinationsProvider,
+                @NotNull WorldDestination worldDestination
+        ) {
+            super(NAME, flagsManager, worldManager, destinationsProvider, worldDestination);
         }
 
         private final CommandFlag noUnloadBukkitWorld = flag(CommandFlag.builder("--no-unload-bukkit-world")

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

@@ -40,12 +40,12 @@ class SetSpawnCommand extends CoreCommand {
     @Subcommand("setspawn")
     @CommandPermission("multiverse.core.spawn.set")
     @CommandCompletion("@flags:groupName=" + UnsafeFlags.NAME + " @flags:resolveUntil=arg1,groupName=" + UnsafeFlags.NAME)
-    @Syntax("[worldname:x,y,z[,pitch,yaw]] [--unsafe]")
+    @Syntax("[worldname:x,y,z[,yaw,pitch]] [--unsafe]")
     @Description("{@@mv-core.setspawn.description}")
     void onSetSpawnCommand(
             MVCommandIssuer issuer,
 
-            @Syntax("[worldname:x,y,z[,pitch,yaw]]")
+            @Syntax("[worldname:x,y,z[,yaw,pitch]]")
             @Description("{@@mv-core.setspawn.location.description}")
             PlayerLocation playerLocation,
 

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

@@ -62,7 +62,7 @@ final class SpawnCommand extends CoreCommand {
     @CommandPermission("@mvspawn")
     @CommandCompletion("@playersarray:checkPermissions=@mvspawnother|@flags:resolveUntil=arg1,groupName=" + UnsafeFlags.NAME
             + " @flags:groupName=" + UnsafeFlags.NAME)
-    @Syntax("[player]")
+    @Syntax("[player] [--unsafe]")
     @Description("{@@mv-core.spawn.description}")
     void onSpawnTpCommand(
             MVCommandIssuer issuer,
@@ -88,11 +88,11 @@ final class SpawnCommand extends CoreCommand {
                                         List<Entity> entities, boolean checkSafety) {
         LoadedMultiverseWorld mvWorld = worldManager.getLoadedWorld(world).getOrNull();
         if (mvWorld == null) {
-            issuer.sendMessage("The world '" + world.getName() + "' is not a multiverse world!");
+            issuer.sendMessage(MVCorei18n.SPAWN_NOTMVWORLD, Replace.WORLD.with(world.getName()));
             return;
         }
         if (!permissionsChecker.checkSpawnPermission(issuer.getIssuer(), entities, mvWorld)) {
-            issuer.sendMessage("You do not have permission to use this command in this world!");
+            issuer.sendMessage(MVCorei18n.SPAWN_NOPERMISSION);
             return;
         }
 
@@ -129,16 +129,18 @@ final class SpawnCommand extends CoreCommand {
                 .checkSafety(checkSafety)
                 .teleport(entities)
                 .onSuccessCount(successCount ->  issuer.sendMessage(MVCorei18n.SPAWN_SUCCESS,
-                        Replace.PLAYER.with(successCount + " players"), //todo: replace this with localised "{count} players"
+                        Replace.PLAYER.with(Message.of(MVCorei18n.GENERIC_PLAYERCOUNT,
+                                Replace.COUNT.with(successCount))),
                         Replace.WORLD.with(mvWorld.getName())))
                 .onFailureCount(reasonsCountMap -> {
                     for (var entry : reasonsCountMap.entrySet()) {
                         Logging.finer("Failed to teleport %s players to %s: %s",
                                 entry.getValue(), mvWorld.getName(), entry.getKey());
                         issuer.sendError(MVCorei18n.SPAWN_FAILED,
-                                Replace.PLAYER.with(entry.getValue() + " players"),
+                                Replace.PLAYER.with(Message.of(MVCorei18n.GENERIC_PLAYERCOUNT,
+                                        Replace.COUNT.with(entry.getValue()))),
                                 Replace.WORLD.with(mvWorld.getName()),
-                                Replace.REASON.with(entry.getKey().getMessageKey()));
+                                Replace.REASON.with(Message.of(entry.getKey())));
                     }
                 });
     }

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

@@ -59,7 +59,7 @@ final class TeleportCommand extends CoreCommand {
     @CommandCompletion("@playersarray:checkPermissions=@mvteleportother|@destinations:byIssuerForArg=arg1 "
             + "@destinations:notByIssuerForArg=arg1|@flags:byIssuerForArg=arg1,groupName=" + Flags.NAME + " "
             + "@flags:notByIssuerForArg=arg1,groupName=" + Flags.NAME)
-    @Syntax("[player] <destination> [--unsafe]")
+    @Syntax("[player] <destination> [--unsafe --silent]")
     @Description("{@@mv-core.teleport.description}")
     void onTeleportCommand(
             MVCommandIssuer issuer,
@@ -74,7 +74,7 @@ final class TeleportCommand extends CoreCommand {
             DestinationInstance<?, ?> destination,
 
             @Optional
-            @Syntax("[--unsafe]")
+            @Syntax("[--unsafe --silent]")
             @Description("")
             String[] flagArray) {
         Player[] players = playersValue.value();
@@ -94,10 +94,9 @@ final class TeleportCommand extends CoreCommand {
                                       DestinationInstance<?, ?> destination,
                                       ParsedCommandFlags parsedFlags) {
         if (!permissionsChecker.checkTeleportPermission(issuer.getIssuer(), player, destination)) {
-            // TODO localize
-            issuer.sendMessage(player == issuer.getPlayer()
-                    ? "You do not have permission to teleport yourself!"
-                    : "You do not have permission to teleport other players!");
+            issuer.sendError(player == issuer.getPlayer()
+                    ? MVCorei18n.TELEPORT_NOPERMISSION_SELF
+                    : MVCorei18n.TELEPORT_NOPERMISSION_OTHER);
             return;
         }
 
@@ -134,8 +133,7 @@ final class TeleportCommand extends CoreCommand {
                                          DestinationInstance<?, ?> destination,
                                          ParsedCommandFlags parsedFlags) {
         if (!permissionsChecker.checkTeleportPermission(issuer.getIssuer(), Arrays.asList(players), destination)) {
-            // TODO localize
-            issuer.sendMessage("You do not have permission to teleport all these players!");
+            issuer.sendError(MVCorei18n.TELEPORT_NOPERMISSION_ALL);
             return;
         }
 
@@ -149,7 +147,8 @@ final class TeleportCommand extends CoreCommand {
                         return;
                     }
                     issuer.sendInfo(MVCorei18n.TELEPORT_SUCCESS,
-                            Replace.PLAYER.with(successCount + " players"),
+                            Replace.PLAYER.with(Message.of(MVCorei18n.GENERIC_PLAYERCOUNT,
+                                    Replace.COUNT.with(successCount))),
                             Replace.DESTINATION.with(destination.getDisplayMessage()));
                 })
                 .onFailureCount(reasonsCountMap -> {
@@ -157,7 +156,8 @@ final class TeleportCommand extends CoreCommand {
                         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.PLAYER.with(Message.of(MVCorei18n.GENERIC_PLAYERCOUNT,
+                                        Replace.COUNT.with(entry.getValue()))),
                                 Replace.DESTINATION.with(destination.getDisplayMessage()),
                                 Replace.REASON.with(Message.of(entry.getKey())));
                     }

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

@@ -14,11 +14,13 @@ 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.command.flags.RemovePlayerDestinationFlags;
+import org.mvplugins.multiverse.core.destination.DestinationInstance;
+import org.mvplugins.multiverse.core.destination.DestinationsProvider;
+import org.mvplugins.multiverse.core.destination.core.WorldDestination;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.utils.result.AsyncAttemptsAggregate;
@@ -27,6 +29,8 @@ import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.helpers.PlayerWorldTeleporter;
 import org.mvplugins.multiverse.core.world.options.UnloadWorldOptions;
 
+import java.util.Objects;
+
 @Service
 class UnloadCommand extends CoreCommand {
 
@@ -48,7 +52,7 @@ class UnloadCommand extends CoreCommand {
     @Subcommand("unload")
     @CommandPermission("multiverse.core.unload")
     @CommandCompletion("@mvworlds @flags:groupName=" + Flags.NAME)
-    @Syntax("<world>")
+    @Syntax("<world> [--remove-players [destination]] [--no-unload-bukkit-world] [--no-save]")
     @Description("{@@mv-core.unload.description}")
     void onUnloadCommand(
             MVCommandIssuer issuer,
@@ -58,19 +62,20 @@ class UnloadCommand extends CoreCommand {
             LoadedMultiverseWorld world,
 
             @Optional
-            @Syntax("[--remove-players] [--no-save]")
+            @Syntax("[--remove-players [destination]] [--no-unload-bukkit-world] [--no-save]")
             @Description("{@@mv-core.gamerules.description.page}")
             String[] flagArray) {
         ParsedCommandFlags parsedFlags = flags.parse(flagArray);
 
         issuer.sendInfo(MVCorei18n.UNLOAD_UNLOADING, Replace.WORLD.with(world.getAliasOrName()));
 
-        var future = parsedFlags.hasFlag(flags.removePlayers)
-                ? playerWorldTeleporter.removeFromWorld(world)
+        DestinationInstance<?, ?> removeToDestination = parsedFlags.flagValue(flags.removePlayers);
+        var future = Objects.nonNull(removeToDestination)
+                ? playerWorldTeleporter.transferAllFromWorldToDestination(world, removeToDestination)
                 : AsyncAttemptsAggregate.emptySuccess();
 
         future.onSuccess(() -> doWorldUnloading(issuer, world, parsedFlags))
-                .onFailure(() -> issuer.sendError("Failed to teleport one or more players out of the world!"));
+                .onFailure(() -> issuer.sendError(MVCorei18n.GENERIC_TELEPORTPLAYERS_FAILED));
     }
 
     private void doWorldUnloading(MVCommandIssuer issuer, LoadedMultiverseWorld world, ParsedCommandFlags parsedFlags) {
@@ -88,13 +93,18 @@ class UnloadCommand extends CoreCommand {
     }
 
     @Service
-    private static final class Flags extends RemovePlayerFlags {
+    private static final class Flags extends RemovePlayerDestinationFlags {
 
         private static final String NAME = "mvunload";
 
         @Inject
-        private Flags(@NotNull CommandFlagsManager flagsManager) {
-            super(NAME, flagsManager);
+        private Flags(
+                @NotNull CommandFlagsManager flagsManager,
+                @NotNull WorldManager worldManager,
+                @NotNull DestinationsProvider destinationsProvider,
+                @NotNull WorldDestination worldDestination
+        ) {
+            super(NAME, flagsManager, worldManager, destinationsProvider, worldDestination);
         }
 
         private final CommandFlag noUnloadBukkitWorld = flag(CommandFlag.builder("--no-unload-bukkit-world")

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

@@ -12,8 +12,11 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
 import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
+import org.mvplugins.multiverse.core.utils.compatibility.WorldBorderCompatibility;
+import org.mvplugins.multiverse.core.utils.tick.TickDuration;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 
+import java.time.temporal.ChronoUnit;
 import java.util.function.Consumer;
 
 import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
@@ -33,25 +36,24 @@ final class WorldBorderCommand extends CoreCommand {
             @Optional
             @Default("0")
             @Syntax("[time]")
-            int time,
+            TickDuration duration,
 
             @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
-        worldBorderAction(issuer, world, worldBorder -> {
-            onWorldBorderSet(issuer, worldBorder.getSize() + size, time, world);
-        });
+        worldBorderAction(issuer, world, worldBorder ->
+                onWorldBorderSet(issuer, worldBorder.getSize() + size, duration, world));
     }
 
     @Subcommand("center")
     void onWorldBorderCenter(
             MVCommandIssuer issuer,
 
-            @Syntax("[x]")
+            @Syntax("<x>")
             double x,
 
-            @Syntax("[z]")
+            @Syntax("<z>")
             double z,
 
             @Flags("resolve=issuerAware,maxArgForAware=0")
@@ -145,7 +147,7 @@ final class WorldBorderCommand extends CoreCommand {
             @Optional
             @Default("0")
             @Syntax("[time]")
-            int time,
+            TickDuration duration,
 
             @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
@@ -158,15 +160,18 @@ final class WorldBorderCommand extends CoreCommand {
                         Replace.WORLD.with(world.getAliasOrName()));
                 return;
             }
-            worldBorder.setSize(size, time);
-            if (time <= 0) {
+            if (!WorldBorderCompatibility.supportsChangeSizeInTicks() && !duration.isExactTo(ChronoUnit.SECONDS)) {
+                setRoundOffError(issuer, duration);
+            }
+            WorldBorderCompatibility.changeSizeDuration(worldBorder, size, duration);
+            if (duration.toTicks() <= 0) {
                 issuer.sendMessage(MVCorei18n.WORLDBORDER_SET_IMMEDIATE,
                         replace("{size}").with(worldBorder.getSize()),
                         Replace.WORLD.with(world.getAliasOrName()));
             } else {
                 issuer.sendMessage(previousSize > size ? MVCorei18n.WORLDBORDER_SET_GROWING : MVCorei18n.WORLDBORDER_SET_SHRINKING,
                         replace("{size}").with(size),
-                        replace("{time}").with(time),
+                        replace("{time}").with(String.format("%.2f", duration.toSeconds())),
                         Replace.WORLD.with(world.getAliasOrName()));
             }
         });
@@ -201,27 +206,36 @@ final class WorldBorderCommand extends CoreCommand {
             MVCommandIssuer issuer,
 
             @Syntax("<time>")
-            int time,
+            TickDuration duration,
 
             @Flags("resolve=issuerAware,maxArgForAware=0")
             @Syntax("[world]")
             LoadedMultiverseWorld world
     ) {
         worldBorderAction(issuer, world, worldBorder -> {
-            if (worldBorder.getWarningTime() == time) {
+            if (WorldBorderCompatibility.getWarningTimeTicks(worldBorder) == duration.toTicks()) {
                 issuer.sendMessage(MVCorei18n.WORLDBORDER_WARNINGTIME_NOTHINGCHANGED,
                         Replace.WORLD.with(world.getAliasOrName()));
                 return;
             }
-            worldBorder.setWarningTime(time);
+            if (!WorldBorderCompatibility.supportsSetWarningTimeInTicks() && !duration.isExactTo(ChronoUnit.SECONDS)) {
+                setRoundOffError(issuer, duration);
+            }
+            WorldBorderCompatibility.setWarningTimeDuration(worldBorder, duration);
             issuer.sendMessage(MVCorei18n.WORLDBORDER_WARNINGTIME_SUCCESS,
-                    replace("{time}").with(worldBorder.getWarningTime()),
+                    replace("{time}").with(String.format("%.2f", WorldBorderCompatibility.getWarningTime(worldBorder))),
                     Replace.WORLD.with(world.getAliasOrName()));
         });
     }
 
+    private void setRoundOffError(MVCommandIssuer issuer, TickDuration duration) {
+        issuer.sendError(MVCorei18n.WORLDBORDER_ROUNDOFF_WARNING,
+                replace("{fromTime}").with(String.format("%.2f", duration.toSeconds())),
+                replace("{toTime}").with(Math.round(duration.toSeconds())));
+    }
+
     private void worldBorderAction(MVCommandIssuer issuer, LoadedMultiverseWorld world, Consumer<WorldBorder> worldBorderAction) {
         Try.run(() -> world.getWorldBorder().peek(worldBorderAction))
-                .onFailure(error -> issuer.sendError(error.getLocalizedMessage()));
+                .onFailure(error -> issuer.sendError(MVCorei18n.GENERIC_ERROR_DETAILS, Replace.ERROR.with(error)));
     }
 }

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

@@ -246,6 +246,16 @@ public final class CoreConfig {
         return configHandle.get(configNodes.endWorldNameFormat);
     }
 
+    @ApiStatus.AvailableSince("5.8")
+    public Try<Void> setWarnAliasConflicts(boolean warnAliasConflicts) {
+        return configHandle.set(configNodes.warnAliasConflicts, warnAliasConflicts);
+    }
+
+    @ApiStatus.AvailableSince("5.8")
+    public boolean getWarnAliasConflicts() {
+        return configHandle.get(configNodes.warnAliasConflicts);
+    }
+
     /**
      * {@inheritDoc}
      */

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

@@ -25,6 +25,8 @@ import org.mvplugins.multiverse.core.destination.DestinationsProvider;
 import org.mvplugins.multiverse.core.dynamiclistener.EventPriorityMapper;
 import org.mvplugins.multiverse.core.event.MVDebugModeEvent;
 import org.mvplugins.multiverse.core.exceptions.MultiverseException;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
 import org.mvplugins.multiverse.core.permissions.PermissionUtils;
 import org.mvplugins.multiverse.core.teleportation.PassengerModes;
 import org.mvplugins.multiverse.core.world.helpers.DimensionFinder.DimensionFormat;
@@ -198,6 +200,15 @@ final class CoreConfigNodes {
             .stringParser(DimensionFormatNodeStringParser.INSTANCE)
             .build());
 
+    final ConfigNode<Boolean> warnAliasConflicts = node(ConfigNode.builder("world.warn-alias-conflicts", Boolean.class)
+            .comment("")
+            .comment("Sets whether Multiverse will warn about alias duplicates when adding worlds or modifying aliases.")
+            .comment("Although not enforced, it is highly recommended to not have multiple worlds with the same alias or")
+            .comment("alias matching another world's name as it can cause confusion during world listing and selection in commands.")
+            .defaultValue(true)
+            .name("warn-alias-conflicts")
+            .build());
+
     private final ConfigHeaderNode teleportHeader = node(ConfigHeaderNode.builder("teleport")
             .comment("")
             .comment("")
@@ -371,7 +382,8 @@ final class CoreConfigNodes {
             .defaultValue(128)
             .name("custom-portal-search-radius")
             .validator(value -> value < 0
-                    ? Try.failure(new MultiverseException("The value must be greater than or equal to 0.", null))
+                    ? Try.failure(new MultiverseException(
+                            Message.of(MVCorei18n.CORE_CONFIG_CUSTOMPORTALSEARCHRADIUS_NONNEGATIVE), null))
                     : Try.success(null))
             .build());
 
@@ -487,7 +499,8 @@ final class CoreConfigNodes {
             .defaultValue(30)
             .name("confirm-timeout")
             .validator(value -> (value <= 0)
-                    ? Try.failure(new MultiverseException("Confirm timeout must be a positive number!"))
+                    ? Try.failure(new MultiverseException(
+                            Message.of(MVCorei18n.CORE_CONFIG_CONFIRMTIMEOUT_POSITIVE)))
                     : Try.success(null))
             .build());
 
@@ -618,7 +631,8 @@ final class CoreConfigNodes {
             .name("global-debug")
             .suggester(input -> List.of("0", "1", "2", "3"))
             .validator(value -> (value < 0 || value > 3)
-                    ? Try.failure(new MultiverseException("Debug level must be between 0 and 3."))
+                    ? Try.failure(new MultiverseException(
+                            Message.of(MVCorei18n.CORE_CONFIG_DEBUGLEVEL_RANGE)))
                     : Try.success(null))
             .onLoadAndChange((oldValue, newValue) -> {
                 if (newValue != Logging.getDebugLevel()) {

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

@@ -3,11 +3,9 @@ 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;
@@ -19,6 +17,7 @@ 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.MapValueNode;
 import org.mvplugins.multiverse.core.config.node.NodeGroup;
 import org.mvplugins.multiverse.core.config.node.ValueNode;
 
@@ -93,17 +92,13 @@ public abstract class BaseConfigurationHandle<C extends ConfigurationSection> {
     }
 
     protected <T> T deserializeNodeFromConfig(ValueNode<T> node) {
-        if (node.getSerializer() == null) {
-            return Option.of(config.getObject(node.getPath(), node.getType())).getOrElse(node::getDefaultValue);
-        }
         return Try.of(() -> {
                     var value = config.get(node.getPath());
-                    if (value == null) {
-                        return node.getDefaultValue();
-                    }
-                    return node.getSerializer().deserialize(value, node.getType());
-                }).flatMap(value -> node.validate(value).map(ignore -> value))
-                .onFailure(e -> Logging.warning("Failed to deserialize node %s: %s", node.getPath(), e.getMessage()))
+                    return value == null ? node.getDefaultValue() : node.deserialize(value);
+                })
+                .flatMap(value -> node.validate(value).map(ignore -> value))
+                .onFailure(e -> Logging.warning("Failed to deserialize node %s: %s",
+                        node.getPath(), e.getMessage()))
                 .getOrElse(node::getDefaultValue);
     }
 
@@ -124,12 +119,7 @@ public abstract class BaseConfigurationHandle<C extends ConfigurationSection> {
         if (value == null) {
             value = node.getDefaultValue();
         }
-        if (node.getSerializer() != null) {
-            var serialized = node.getSerializer().serialize(value, node.getType());
-            config.set(node.getPath(), serialized);
-        } else {
-            config.set(node.getPath(), value);
-        }
+        config.set(node.getPath(), node.serialize(value));
     }
 
     /**
@@ -163,6 +153,15 @@ public abstract class BaseConfigurationHandle<C extends ConfigurationSection> {
         return set(Bukkit.getConsoleSender(), node, value);
     }
 
+    public <K, V> Try<Void> set(@NotNull MapValueNode<K, V> node, K key, V value) {
+        return node.validateEntry(key, value).map(ignore -> {
+            Map<K,V> map = get(node);
+            map.put(key, value);
+            // node.onSetEntryValue(null, key, null, value);
+            return null;
+        });
+    }
+
     /**
      * Sets the value of a node, if the validator is not null, it will be tested first.
      *
@@ -221,6 +220,18 @@ public abstract class BaseConfigurationHandle<C extends ConfigurationSection> {
         });
     }
 
+    public <K, V> Try<Void> remove(@NotNull MapValueNode<K, V> node, K key) {
+        return node.validateKey(key).map(ignore -> {
+            Map<K,V> map = get(node);
+            V value = map.remove(key);
+            if (value == null) {
+                throw new IllegalArgumentException("Cannot remove entry as it is already not in the map!");
+            }
+            // node.onSetEntryValue(key, value, null);
+            return null;
+        });
+    }
+
     /**
      * Sets the default value of a node.
      *

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

@@ -112,10 +112,5 @@ public abstract class FileConfigurationHandle<C extends FileConfiguration> exten
          * @return The configuration handle.
          */
         public abstract @NotNull FileConfigurationHandle<C> build();
-
-        @SuppressWarnings("unchecked")
-        protected B self() {
-            return (B) this;
-        }
     }
 }

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

@@ -180,6 +180,24 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
         return serializer;
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public T deserialize(@Nullable Object object) {
+        return serializer == null
+                ? (type.isInstance(object)) ? type.cast(object) : getDefaultValue()
+                : serializer.deserialize(object, type);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public Object serialize(T value) {
+        return serializer ==  null ? value : serializer.serialize(value, type);
+    }
+
     /**
      * {@inheritDoc}
      */
@@ -474,6 +492,7 @@ public class ConfigNode<T> extends ConfigHeaderNode implements ValueNode<T> {
          * @deprecated Use {@link #onLoadAndChange(NodeChangeCallback)} instead.
          */
         @Deprecated(since = "5.4", forRemoval = true)
+        @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
         public @NotNull B onSetValue(@NotNull BiConsumer<T, T> onSetValue) {
             return onLoadAndChange(onSetValue::accept);
         }

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

@@ -283,7 +283,7 @@ public class ListConfigNode<I> extends ConfigNode<List<I>> implements ListValueN
             //noinspection unchecked
             super(path, (Class<List<I>>) (Object) List.class);
             this.itemType = itemType;
-            this.defaultValue = () -> (List<I>) new ArrayList<>();
+            this.defaultValue = ArrayList::new;
         }
 
         /**

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

@@ -0,0 +1,607 @@
+package org.mvplugins.multiverse.core.config.node;
+
+import com.dumptruckman.minecraft.util.Logging;
+import io.vavr.control.Try;
+import org.bukkit.command.CommandSender;
+import org.bukkit.configuration.ConfigurationSection;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+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.NodeStringParser;
+import org.mvplugins.multiverse.core.config.node.functions.NodeSuggester;
+import org.mvplugins.multiverse.core.config.node.functions.NodeValueCallback;
+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;
+import org.mvplugins.multiverse.core.config.node.serializer.NodeSerializer;
+import org.mvplugins.multiverse.core.exceptions.MultiverseException;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
+import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.utils.REPatterns;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+import static org.mvplugins.multiverse.core.locale.message.MessageReplacement.replace;
+
+/**
+ * A config node that contains key-value mappings.
+ *
+ * @param <K> The key type.
+ * @param <V> The value type.
+ *
+ * @since 5.7
+ */
+@ApiStatus.AvailableSince("5.7")
+public class MapConfigNode<K, V> extends ConfigNode<Map<K, V>> implements MapValueNode<K, V> {
+
+    /**
+     * Creates a new builder for a {@link MapConfigNode}.
+     *
+     * @param path      The path of the node.
+     * @param keyType   The map key type.
+     * @param valueType The map value type.
+     * @param <K>       The key type.
+     * @param <V>       The value type.
+     * @return The new builder.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static @NotNull <K, V> Builder<K, V> mapBuilder(
+            @NotNull String path,
+            @NotNull Class<K> keyType,
+            @NotNull Class<V> valueType) {
+        return new Builder<>(path, keyType, valueType);
+    }
+
+    protected final @NotNull Class<K> keyType;
+    protected final @NotNull Class<V> valueType;
+    protected final @Nullable NodeSuggester keySuggester;
+    protected final @Nullable NodeSuggester valueSuggester;
+    protected final @Nullable NodeStringParser<K> keyStringParser;
+    protected final @Nullable NodeStringParser<V> valueStringParser;
+    protected final @Nullable NodeSerializer<K> keySerializer;
+    protected final @Nullable NodeSerializer<V> valueSerializer;
+    protected final @Nullable Function<K, Try<Void>> keyValidator;
+    protected final @Nullable Function<V, Try<Void>> valueValidator;
+
+    protected MapConfigNode(
+            @NotNull String path,
+            @NotNull String[] comments,
+            @Nullable String name,
+            @NotNull Class<Map<K, V>> type,
+            @NotNull String[] aliases,
+            @Nullable Supplier<Map<K, V>> defaultValueSupplier,
+            @Nullable NodeSuggester suggester,
+            @Nullable NodeStringParser<Map<K, V>> stringParser,
+            @Nullable NodeSerializer<Map<K, V>> serializer,
+            @Nullable Function<Map<K, V>, Try<Void>> validator,
+            @Nullable NodeValueCallback<Map<K, V>> onLoad,
+            @Nullable NodeChangeCallback<Map<K, V>> onLoadAndChange,
+            @Nullable NodeChangeCallback<Map<K, V>> onChange,
+            @NotNull Class<K> keyType,
+            @NotNull Class<V> valueType,
+            @Nullable NodeSuggester keySuggester,
+            @Nullable NodeSuggester valueSuggester,
+            @Nullable NodeStringParser<K> keyStringParser,
+            @Nullable NodeStringParser<V> valueStringParser,
+            @Nullable NodeSerializer<K> keySerializer,
+            @Nullable NodeSerializer<V> valueSerializer,
+            @Nullable Function<K, Try<Void>> keyValidator,
+            @Nullable Function<V, Try<Void>> valueValidator) {
+        super(path, comments, name, type, aliases, defaultValueSupplier, suggester, stringParser, serializer,
+                validator, onLoad, onLoadAndChange, onChange);
+        this.keyType = keyType;
+        this.valueType = valueType;
+        this.keySuggester = keySuggester != null
+                ? keySuggester
+                : DefaultSuggesterProvider.getDefaultSuggester(keyType);
+        this.valueSuggester = valueSuggester != null
+                ? valueSuggester
+                : DefaultSuggesterProvider.getDefaultSuggester(valueType);
+        this.keyStringParser = keyStringParser != null
+                ? keyStringParser
+                : DefaultStringParserProvider.getDefaultStringParser(keyType);
+        this.valueStringParser = valueStringParser != null
+                ? valueStringParser
+                : DefaultStringParserProvider.getDefaultStringParser(valueType);
+        this.keySerializer = keySerializer != null
+                ? keySerializer
+                : DefaultSerializerProvider.getDefaultSerializer(keyType);
+        this.valueSerializer = valueSerializer != null
+                ? valueSerializer
+                : DefaultSerializerProvider.getDefaultSerializer(valueType);
+        this.keyValidator = keyValidator != null
+                ? keyValidator
+                : defaultYamlKeyValidator();
+        this.valueValidator = valueValidator;
+
+        setDefaults();
+    }
+
+    private Function<K, Try<Void>> defaultYamlKeyValidator() {
+        return key -> Try.of(() -> {
+            if (!REPatterns.YAML_KEY.matcher(String.valueOf(serializeKey(key))).matches()) {
+                throw new MultiverseException(Message.of(MVCorei18n.CONFIG_NODE_INVALIDYAMLKEY,
+                        replace("{key}").with(key)));
+            }
+            return null;
+        });
+    }
+
+    private void setDefaults() {
+        if ((this.keySuggester != null || this.valueSuggester != null) && this.suggester == null) {
+            setDefaultSuggester();
+        }
+        if (this.keyStringParser != null && this.valueStringParser != null && this.stringParser == null) {
+            setDefaultStringParser();
+        }
+        if ((this.keyValidator != null || this.valueValidator != null) && this.validator == null) {
+            setDefaultValidator();
+        }
+        if ((this.keySerializer != null || this.valueSerializer != null) && this.serializer == null) {
+            setDefaultSerializer();
+        }
+        if (this.defaultValue == null) {
+            this.defaultValue = LinkedHashMap::new;
+        }
+    }
+
+    private void setDefaultSuggester() {
+        if (this.keySuggester instanceof SenderNodeSuggester || this.valueSuggester instanceof SenderNodeSuggester) {
+            this.suggester = (SenderNodeSuggester) this::suggestEntries;
+        } else {
+            this.suggester = input -> suggestEntries(null, input);
+        }
+    }
+
+    private @NotNull Collection<String> suggestEntries(@Nullable CommandSender sender, @Nullable String input) {
+        String content = input == null ? "" : input;
+        int lastComma = content.lastIndexOf(',');
+        String prefix = lastComma == -1 ? "" : content.substring(0, lastComma + 1);
+        String currentEntry = lastComma == -1 ? content : content.substring(lastComma + 1);
+
+        String[] keyValue = REPatterns.EQUALS.split(currentEntry, 2);
+        if (keyValue.length == 2 && valueSuggester != null) {
+            String keyPart = keyValue[0];
+            String valuePart = keyValue[1];
+            return suggestFrom(valueSuggester, sender, valuePart).stream()
+                    .map(suggestedValue -> prefix + keyPart + "=" + suggestedValue)
+                    .toList();
+        }
+
+        if (keySuggester == null) {
+            return Collections.emptyList();
+        }
+
+        return suggestFrom(keySuggester, sender, currentEntry).stream()
+                .map(suggestedKey -> prefix + suggestedKey + "=")
+                .toList();
+    }
+
+    private @NotNull Collection<String> suggestFrom(
+            @NotNull NodeSuggester suggester,
+            @Nullable CommandSender sender,
+            @Nullable String input) {
+        if (sender != null && suggester instanceof SenderNodeSuggester senderSuggester) {
+            return senderSuggester.suggest(sender, input);
+        }
+        return suggester.suggest(input);
+    }
+
+    private void setDefaultStringParser() {
+        this.stringParser = (input, type) -> Try.of(() -> {
+            Map<K, V> parsed = new LinkedHashMap<>();
+            if (input == null || input.isBlank()) {
+                return parsed;
+            }
+            for (String entry : REPatterns.SEMICOLON.split(input)) {
+                String[] keyValue = REPatterns.EQUALS.split(entry, 2);
+                if (keyValue.length != 2) {
+                    throw new IllegalArgumentException("Invalid map entry '" + entry + "'. Expected format key=value");
+                }
+                NodeStringParser<K> keyParser = Objects.requireNonNull(keyStringParser, "keyStringParser");
+                NodeStringParser<V> valueParser = Objects.requireNonNull(valueStringParser, "valueStringParser");
+                K parsedKey = keyParser.parse(keyValue[0].trim(), keyType).get();
+                V parsedValue = valueParser.parse(keyValue[1].trim(), valueType).get();
+                parsed.put(parsedKey, parsedValue);
+            }
+            return parsed;
+        });
+    }
+
+    private void setDefaultValidator() {
+        this.validator = value -> Try.of(() -> {
+            if (value == null) {
+                return null;
+            }
+            for (Map.Entry<K, V> entry : value.entrySet()) {
+                if (keyValidator != null) {
+                    keyValidator.apply(entry.getKey()).get();
+                }
+                if (valueValidator != null) {
+                    valueValidator.apply(entry.getValue()).get();
+                }
+            }
+            return null;
+        });
+    }
+
+    private void setDefaultSerializer() {
+        this.serializer = new NodeSerializer<>() {
+            @Override
+            public Map<K, V> deserialize(Object object, Class<Map<K, V>> type) {
+                if (object == null) {
+                    return new LinkedHashMap<>();
+                }
+
+                if (object instanceof Map<?, ?> rawMap) {
+                    Map<K, V> result = new LinkedHashMap<>();
+                    rawMap.forEach((key, value) -> {
+                        Map.Entry<K, V> entry = deserializeEntry(key, value);
+                        result.put(entry.getKey(), entry.getValue());
+                    });
+                    return result;
+                }
+
+                if (object instanceof ConfigurationSection section) {
+                    Map<K, V> result = new LinkedHashMap<>();
+                    for (String key : section.getKeys(false)) {
+                        Object rawValue = section.get(key);
+                        Map.Entry<K, V> entry = deserializeEntry(key, rawValue);
+                        result.put(entry.getKey(), entry.getValue());
+                    }
+                    return result;
+                }
+
+                throw new IllegalArgumentException("Invalid map object '" + object + "'. Expected map or section.");
+            }
+
+            @Override
+            public Object serialize(Map<K, V> object, Class<Map<K, V>> type) {
+                Map<Object, Object> serialized = new LinkedHashMap<>();
+                if (object == null) {
+                    return serialized;
+                }
+                object.forEach((key, value) -> {
+                    Map.Entry<Object, Object> entry = serializeEntry(key, value);
+                    serialized.put(entry.getKey(), entry.getValue());
+                });
+                return serialized;
+            }
+        };
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Try<Void> validateKey(@Nullable K key) {
+        return keyValidator == null ? Try.success(null) : keyValidator.apply(key);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Try<Void> validateValue(@Nullable V value) {
+        return valueValidator == null ? Try.success(null) : valueValidator.apply(value);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Try<Void> validateEntry(@Nullable K key, @Nullable V value) {
+        return validateKey(key).flatMap(ignored -> validateValue(value));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Map.Entry<K, V> deserializeEntry(@Nullable Object key, @Nullable Object value) {
+        K deserializedKey = keySerializer == null
+                ? keyType.isInstance(key) ? keyType.cast(key) : null
+                : keySerializer.deserialize(key, keyType);
+        V deserializedValue = valueSerializer == null
+                ? keyType.isInstance(value) ? valueType.cast(value) : null
+                : valueSerializer.deserialize(value, valueType);
+        return new SimpleEntry<>(deserializedKey, deserializedValue);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull Map.Entry<Object, Object> serializeEntry(@Nullable K key, @Nullable V value) {
+        return new SimpleEntry<>(serializeKey(key), serializeValue(value));
+    }
+
+    private @Nullable Object serializeKey(@Nullable K key) {
+        return keySerializer == null ? key : keySerializer.serialize(key, keyType);
+    }
+
+    private @Nullable Object serializeValue(@Nullable V value) {
+        return valueSerializer == null ? value : valueSerializer.serialize(value, valueType);
+    }
+
+    private record SimpleEntry<K, V>(K key, V value) implements Map.Entry<K, V> {
+        @Override
+        public K getKey() {
+            return key;
+        }
+
+        @Override
+        public V getValue() {
+            return value;
+        }
+
+        @Override
+        public V setValue(V value) {
+            throw new UnsupportedOperationException();
+        }
+    }
+
+    /**
+     * Builder for {@link MapConfigNode} instances.
+     *
+     * <p>This builder extends {@link ConfigNode.Builder} with additional configuration specific to map entries:
+     * entry-level suggesters, string parsers, serializers and validators for both keys and values. When any
+     * entry-level component is omitted the builder provides a sensible default (for example default parsers,
+     * suggesters, serializers or an empty map default value).
+     *
+     * @param <K> The map key type.
+     * @param <V> The map value type.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static class Builder<K, V> extends ConfigNode.Builder<Map<K, V>, Builder<K, V>> {
+
+        protected final @NotNull Class<K> keyType;
+        protected final @NotNull Class<V> valueType;
+        protected @Nullable NodeSuggester keySuggester;
+        protected @Nullable NodeSuggester valueSuggester;
+        protected @Nullable NodeStringParser<K> keyStringParser;
+        protected @Nullable NodeStringParser<V> valueStringParser;
+        protected @Nullable NodeSerializer<K> keySerializer;
+        protected @Nullable NodeSerializer<V> valueSerializer;
+        protected @Nullable Function<K, Try<Void>> keyValidator;
+        protected @Nullable Function<V, Try<Void>> valueValidator;
+
+        /**
+         * Creates a new builder for a map config node.
+         *
+         * @param path The configuration path for the node.
+         * @param keyType The runtime type of the map keys.
+         * @param valueType The runtime type of the map values.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        protected Builder(@NotNull String path, @NotNull Class<K> keyType, @NotNull Class<V> valueType) {
+            //noinspection unchecked
+            super(path, (Class<Map<K, V>>) (Object) Map.class);
+            this.keyType = keyType;
+            this.valueType = valueType;
+            this.defaultValue = LinkedHashMap::new;
+        }
+
+        /**
+         * Sets a suggester for map keys. The suggester is used when computing tab-completion suggestions for the
+         * key part of an entry.
+         *
+         * @param keySuggester The suggester to use for keys.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> keySuggester(@NotNull NodeSuggester keySuggester) {
+            this.keySuggester = keySuggester;
+            return self();
+        }
+
+        /**
+         * Sets a sender-aware suggester for map keys. Use this when suggestions depend on the command sender
+         * (permissions, location, etc.).
+         *
+         * @param keySuggester The sender-aware suggester.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> keySuggester(@NotNull SenderNodeSuggester keySuggester) {
+            this.keySuggester = keySuggester;
+            return self();
+        }
+
+        /**
+         * Sets a suggester for map values. The suggester is used when computing tab-completion suggestions for the
+         * value part of an entry.
+         *
+         * @param valueSuggester The suggester to use for values.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> valueSuggester(@NotNull NodeSuggester valueSuggester) {
+            this.valueSuggester = valueSuggester;
+            return self();
+        }
+
+        /**
+         * Sets a sender-aware suggester for map values. Use this when value suggestions depend on the
+         * command sender.
+         *
+         * @param valueSuggester The sender-aware suggester.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> valueSuggester(@NotNull SenderNodeSuggester valueSuggester) {
+            this.valueSuggester = valueSuggester;
+            return self();
+        }
+
+        /**
+         * Sets the string parser for keys. The parser is used when parsing user-provided key strings into key
+         * instances (e.g. when parsing a map from a single-line string representation).
+         *
+         * @param keyStringParser The parser to use for keys.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> keyStringParser(@NotNull NodeStringParser<K> keyStringParser) {
+            this.keyStringParser = keyStringParser;
+            return self();
+        }
+
+        /**
+         * Sets a sender-aware string parser for keys. Use this when parsing depends on the sender context.
+         *
+         * @param keyStringParser The sender-aware key parser.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> keyStringParser(@NotNull SenderNodeStringParser<K> keyStringParser) {
+            this.keyStringParser = keyStringParser;
+            return self();
+        }
+
+        /**
+         * Sets the string parser for values. The parser converts the textual part after '=' in an entry into the
+         * value type.
+         *
+         * @param valueStringParser The parser to use for values.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> valueStringParser(@NotNull NodeStringParser<V> valueStringParser) {
+            this.valueStringParser = valueStringParser;
+            return self();
+        }
+
+        /**
+         * Sets a sender-aware string parser for values.
+         *
+         * @param valueStringParser The sender-aware value parser.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> valueStringParser(@NotNull SenderNodeStringParser<V> valueStringParser) {
+            this.valueStringParser = valueStringParser;
+            return self();
+        }
+
+        /**
+         * Sets the serializer for keys. Serializers convert keys to/from persisted forms stored in the configuration
+         * backend.
+         *
+         * @param keySerializer The key serializer.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> keySerializer(@NotNull NodeSerializer<K> keySerializer) {
+            this.keySerializer = keySerializer;
+            return self();
+        }
+
+        /**
+         * Sets the serializer for values.
+         *
+         * @param valueSerializer The value serializer.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> valueSerializer(@NotNull NodeSerializer<V> valueSerializer) {
+            this.valueSerializer = valueSerializer;
+            return self();
+        }
+
+        /**
+         * Sets a validator for keys. The validator should return a successful {@link Try} for valid keys or a failed
+         * {@link Try} describing the validation error for invalid keys.
+         *
+         * @param keyValidator The key validator.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> keyValidator(@NotNull Function<K, Try<Void>> keyValidator) {
+            this.keyValidator = keyValidator;
+            return self();
+        }
+
+        /**
+         * Sets a validator for values.
+         *
+         * @param valueValidator The value validator.
+         * @return This builder for chaining.
+         *
+         * @since 5.7
+         */
+        @ApiStatus.AvailableSince("5.7")
+        public @NotNull Builder<K, V> valueValidator(@NotNull Function<V, Try<Void>> valueValidator) {
+            this.valueValidator = valueValidator;
+            return self();
+        }
+
+        /**
+         * {@inheritDoc}
+         */
+        @Override
+        public @NotNull MapConfigNode<K, V> build() {
+            return new MapConfigNode<>(
+                    path,
+                    comments.toArray(new String[0]),
+                    name,
+                    type,
+                    aliases,
+                    defaultValue,
+                    suggester,
+                    stringParser,
+                    serializer,
+                    validator,
+                    onLoad,
+                    onLoadAndChange,
+                    onChange,
+                    keyType,
+                    valueType,
+                    keySuggester,
+                    valueSuggester,
+                    keyStringParser,
+                    valueStringParser,
+                    keySerializer,
+                    valueSerializer,
+                    keyValidator,
+                    valueValidator);
+        }
+    }
+}

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

@@ -0,0 +1,93 @@
+package org.mvplugins.multiverse.core.config.node;
+
+import io.vavr.control.Try;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Map;
+
+/**
+ * A {@link ValueNode} specialization that stores a {@link Map} of key-value pairs.
+ *
+ * @param <K> The key type.
+ * @param <V> The value type.
+ *
+ * @since 5.7
+ */
+@ApiStatus.AvailableSince("5.7")
+public interface MapValueNode<K, V> extends ValueNode<Map<K, V>> {
+
+    /**
+     * Validates a single map key.
+     * <br />
+     * Implementations should return a successful {@link Try} when the key is acceptable, or a failed
+     * {@link Try} when the key is invalid.
+     *
+     * @param key The key to validate, or {@code null} if the key is absent.
+     * @return A successful {@link Try} if the key is valid, or a failed {@link Try} if it is not.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull Try<Void> validateKey(@Nullable K key);
+
+    /**
+     * Validates a single map value.
+     * <br />
+     * Implementations should return a successful {@link Try} when the value is acceptable, or a failed
+     * {@link Try} when the value is invalid.
+     *
+     * @param value The value to validate, or {@code null} if the value is absent.
+     * @return A successful {@link Try} if the value is valid, or a failed {@link Try} if it is not.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull Try<Void> validateValue(@Nullable V value);
+
+    /**
+     * Validates a key-value entry.
+     * <br />
+     * This is typically implemented by composing {@link #validateKey(Object)} and {@link #validateValue(Object)}.
+     * If either part fails, the entry is considered invalid.
+     *
+     * @param key The entry key, or {@code null} if the key is absent.
+     * @param value The entry value, or {@code null} if the value is absent.
+     * @return A successful {@link Try} if both parts are valid, or a failed {@link Try} if either part is invalid.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull Try<Void> validateEntry(@Nullable K key, @Nullable V value);
+
+    /**
+     * Deserializes a raw key-value pair into a map entry.
+     * <br />
+     * This method converts a single persisted entry, not the full map. If either component cannot be converted,
+     * implementations may return {@code null} for that side of the entry.
+     *
+     * @param key The raw key object, or {@code null} if no key is present.
+     * @param value The raw value object, or {@code null} if no value is present.
+     * @return A map entry containing the deserialized key and value.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull Map.Entry<K, V> deserializeEntry(@Nullable Object key, @Nullable Object value);
+
+    /**
+     * Serializes a map entry into raw configuration objects.
+     * <br />
+     * This method converts a single entry to a persisted representation, not the full map. The returned entry
+     * contains the serialized key and serialized value.
+     *
+     * @param key The entry key, or {@code null} if the key is absent.
+     * @param value The entry value, or {@code null} if the value is absent.
+     * @return A map entry containing the serialized key and value.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull Map.Entry<Object, Object> serializeEntry(@Nullable K key, @Nullable V value);
+}

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

@@ -34,7 +34,7 @@ public interface ValueNode<T> extends Node {
      * Gets the aliases of this node. Serves as shorter or legacy alternatives the {@link #getName()} and must be
      * unique within a node group.
      *
-     * @return The aliases of this node.
+     * @return The aliases of this node, or an empty array if the node has no aliases.
      *
      * @since 5.1
      */
@@ -44,27 +44,36 @@ public interface ValueNode<T> extends Node {
     }
 
     /**
-     * Gets the default value with type {@link T} of the node.
+     * Gets the default value for this node.
      *
-     * @return The default value of the node.
+     * <p>The returned value is used when no explicit value is present or when deserialization falls back to the
+     * node's default. Implementations may return {@code null} to indicate that no default value is available.
+     *
+     * @return The default value of the node, or {@code null} if none is configured.
      */
     @Nullable T getDefaultValue();
 
     /**
-     * Suggests possible string values for this node. Generated based on the current user input.
+     * Suggests possible string values for this node.
      *
-     * @param input The current partial user input
+     * <p>The returned values are based on the current partial user input and should be suitable for command-line
+     * tab completion or other interactive hints.
+     *
+     * @param input The current partial user input, or {@code null} if no input has been typed yet.
      * @return A collection of possible string values.
      */
     @NotNull Collection<String> suggest(@Nullable String input);
 
     /**
-     * Suggests possible string values for this node. Use contextural information from the sender such as
-     * sender name, permissions, or player location for better suggestions.
+     * Suggests possible string values for this node using sender context.
      *
-     * @param sender    The sender context.
-     * @param input     The input string.
-     * @return A collection of possible string values
+     * <p>Implementations may use the sender's name, permissions, or player location to tailor the returned
+     * suggestions. If no sender-specific logic is available, implementations should fall back to
+     * {@link #suggest(String)}.
+     *
+     * @param sender The sender context.
+     * @param input The current partial user input, or {@code null} if no input has been typed yet.
+     * @return A collection of possible string values.
      *
      * @since 5.1
      */
@@ -72,20 +81,25 @@ public interface ValueNode<T> extends Node {
     @NotNull Collection<String> suggest(@NotNull CommandSender sender, @Nullable String input);
 
     /**
-     * Parses the given string into a value of type {@link T}. Used for property set by user input.
+     * Parses the given string into a value of type {@link T}.
      *
-     * @param input The string to parse.
-     * @return The parsed value, or given exception if parsing failed.
+     * <p>This is typically used for values entered by a user or read from configuration text.
+     *
+     * @param input The string to parse, or {@code null} if the source value is absent.
+     * @return The parsed value, or a failed {@link Try} containing the parsing error.
      */
     @NotNull Try<T> parseFromString(@Nullable String input);
 
     /**
      * Parses the given string into a value of type {@link T} with context from the sender.
-     * Used for property set by user input.
      *
-     * @param sender    The sender context.
-     * @param input     The string to parse.
-     * @return The parsed value, or given exception if parsing failed.
+     * <p>Sender-aware implementations may use permissions or other sender-specific information when converting the
+     * input. If no sender-aware parser is available, implementations should fall back to
+     * {@link #parseFromString(String)}.
+     *
+     * @param sender The sender context.
+     * @param input The string to parse, or {@code null} if the source value is absent.
+     * @return The parsed value, or a failed {@link Try} containing the parsing error.
      *
      * @since 5.1
      */
@@ -97,23 +111,59 @@ public interface ValueNode<T> extends Node {
     /**
      * Gets the serializer for this node.
      *
-     * @return  The serializer for this node.
+     * <p>This method exists for backward compatibility while the preferred API is
+     * {@link #serialize(Object)} and {@link #deserialize(Object)}.
+     *
+     * @return The serializer for this node, or {@code null} if none is configured.
+     *
+     * @deprecated Use {@link #serialize(Object)} and {@link #deserialize(Object)} instead.
      */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable NodeSerializer<T> getSerializer();
 
+    /**
+     * Deserializes a raw configuration object into a value of type {@link T}.
+     *
+     * <p>The input is typically a value read from YAML or another configuration source. Implementations should
+     * return a sensible fallback, such as {@link #getDefaultValue()}, when the object cannot be converted.
+     *
+     * @param object The raw object to deserialize.
+     * @return The deserialized value, or {@code null} if the object cannot be converted and no fallback exists.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @Nullable T deserialize(@Nullable Object object);
+
+    /**
+     * Serializes a value of type {@link T} into a configuration-friendly object.
+     *
+     * <p>The returned object should be suitable for persistence in a configuration file.
+     *
+     * @param value The value to serialize.
+     * @return The serialized representation, or {@code null} if the value cannot be serialized.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @Nullable Object serialize(@Nullable T value);
+
     /**
      * Validates the value of this node.
      *
      * @param value The value to validate.
-     * @return An empty {@link Try} if the value is valid, or a {@link Try} containing an exception if the value is
-     *         invalid.
+     * @return A successful {@link Try} if the value is valid, or a failed {@link Try} containing the validation
+     *         exception if the value is invalid.
      */
     Try<Void> validate(@Nullable T value);
 
     /**
      * Called when the value of this node is loaded by {@link BaseConfigurationHandle#load()}.
      *
-     * @param value The loaded value.
+     * <p>This callback is invoked after the value has been deserialized and validated during a configuration load.
+     *
+     * @param value The loaded value, or {@code null} if the configured value could not be resolved.
      *
      * @since 5.4
      */
@@ -123,9 +173,12 @@ public interface ValueNode<T> extends Node {
     /**
      * 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.
+     * <p>This callback is shared by both initial load and subsequent updates. When invoked during a load, the
+     * {@code oldValue} parameter will be {@code null} and the sender will be the console sender.
+     *
+     * @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 previous value, or {@code null} when called during load.
      * @param newValue The new value.
      *
      * @since 5.4
@@ -136,9 +189,11 @@ public interface ValueNode<T> extends Node {
     /**
      * 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.
+     * <p>This callback is only invoked for explicit updates after the value already exists.
+     *
+     * @param sender The sender who changed the value, or the console sender if no target sender was specified.
+     * @param oldValue The old value.
+     * @param newValue The new value.
      *
      * @since 5.4
      */
@@ -148,12 +203,15 @@ public interface ValueNode<T> extends Node {
     /**
      * Called when the value of this node is set.
      *
+     * <p>This is the legacy, senderless form of {@link #onLoadAndChange(CommandSender, Object, Object)}.
+     *
      * @param oldValue The old value.
      * @param newValue The new value.
      *
      * @deprecated Use {@link #onLoadAndChange(CommandSender, Object, Object)} instead.
      */
     @Deprecated(since = "5.4", forRemoval = true)
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     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

@@ -8,6 +8,10 @@ import co.aikar.commands.ACFUtil;
 import io.vavr.control.Option;
 import io.vavr.control.Try;
 import org.mvplugins.multiverse.core.exceptions.MultiverseException;
+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;
 
 /**
  * Provides default string parsers for common types.
@@ -51,24 +55,33 @@ public final class DefaultStringParserProvider {
             () -> 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'");
+                default -> throw new MultiverseException(Message.of(MVCorei18n.CONFIG_STRING_PARSER_INVALIDBOOLEAN,
+                        replace("{input}").with(input)));
             });
 
     private static final NodeStringParser<Integer> INTEGER_STRING_PARSER = (input, type) -> Try.of(
             () -> ACFUtil.parseInt(input))
-            .flatMap(number -> Option.of(number).toTry(() -> new MultiverseException("Unable to convert '" + input + "' to number. (integer)")));
+            .flatMap(number -> Option.of(number).toTry(() -> new MultiverseException(Message.of(
+                    MVCorei18n.CONFIG_STRING_PARSER_INVALIDINTEGER,
+                    replace("{input}").with(input)))));
 
     private static final NodeStringParser<Double> DOUBLE_STRING_PARSER = (input, type) -> Try.of(
             () -> ACFUtil.parseDouble(input))
-            .flatMap(number -> Option.of(number).toTry(() -> new MultiverseException("Unable to convert '" + input + "' to number. (double)")));
+            .flatMap(number -> Option.of(number).toTry(() -> new MultiverseException(Message.of(
+                    MVCorei18n.CONFIG_STRING_PARSER_INVALIDDOUBLE,
+                    replace("{input}").with(input)))));
 
     private static final NodeStringParser<Float> FLOAT_STRING_PARSER = (input, type) -> Try.of(
             () -> ACFUtil.parseFloat(input))
-            .flatMap(number -> Option.of(number).toTry(() -> new MultiverseException("Unable to convert '" + input + "' to number. (float)")));
+            .flatMap(number -> Option.of(number).toTry(() -> new MultiverseException(Message.of(
+                    MVCorei18n.CONFIG_STRING_PARSER_INVALIDFLOAT,
+                    replace("{input}").with(input)))));
 
     private static final NodeStringParser<Long> LONG_STRING_PARSER = (input, type) -> Try.of(
             () -> ACFUtil.parseLong(input))
-            .flatMap(number -> Option.of(number).toTry(() -> new MultiverseException("Unable to convert '" + input + "' to number. (long)")));
+            .flatMap(number -> Option.of(number).toTry(() -> new MultiverseException(Message.of(
+                    MVCorei18n.CONFIG_STRING_PARSER_INVALIDLONG,
+                    replace("{input}").with(input)))));
 
     static {
         addDefaultStringParser(String.class, STRING_STRING_PARSER);

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

@@ -7,8 +7,11 @@ import org.bukkit.util.Vector;
 import org.jetbrains.annotations.NotNull;
 
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
+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;
+
 /**
  * Destination instance implementation for the {@link AnchorDestination}.
  */
@@ -69,8 +72,7 @@ public final class AnchorDestinationInstance extends DestinationInstance<AnchorD
      */
     @Override
     public @NotNull Message getDisplayMessage() {
-        //TODO Localize
-        return Message.of("anchor '" + anchorName + "'");
+        return Message.of(MVCorei18n.DESTINATION_ANCHOR_DISPLAY, replace("{anchor}").with(anchorName));
     }
 
     /**

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

@@ -9,7 +9,9 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import org.mvplugins.multiverse.core.destination.DestinationInstance;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.locale.message.Message;
+import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 
 /**
  * Destination instance implementation for the {@link BedDestination}.
@@ -70,8 +72,9 @@ public final class BedDestinationInstance extends DestinationInstance<BedDestina
      */
     @Override
     public @NotNull Message getDisplayMessage() {
-        //TODO Localize
-        return Message.of(player == null ? "your bed/respawn point" : player.getName() + "'s bed/respawn point");
+        return player == null
+                ? Message.of(MVCorei18n.DESTINATION_BED_DISPLAY_OWN)
+                : Message.of(MVCorei18n.DESTINATION_BED_DISPLAY_OTHER, Replace.PLAYER.with(player.getName()));
     }
 
     /**

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

@@ -96,12 +96,14 @@ public final class ExactDestination implements Destination<ExactDestination, Exa
             return Attempt.failure(InstanceFailureReason.INVALID_FORMAT);
         }
 
-        String worldName = items[0];
+        String worldNameOrAlias = items[0];
         String positionStr = items[1];
 
-        World world = getLoadedMultiverseWorld(worldName).flatMap(LoadedMultiverseWorld::getBukkitWorld).getOrNull();
+        World world = getLoadedMultiverseWorld(worldNameOrAlias)
+                .flatMap(LoadedMultiverseWorld::getBukkitWorld)
+                .getOrNull();
         if (world == null) {
-            return Attempt.failure(InstanceFailureReason.WORLD_NOT_FOUND, Replace.WORLD.with(worldName));
+            return Attempt.failure(InstanceFailureReason.WORLD_NOT_FOUND, Replace.WORLD.with(worldNameOrAlias));
         }
 
         EntityPosition position;
@@ -111,7 +113,7 @@ public final class ExactDestination implements Destination<ExactDestination, Exa
             return Attempt.failure(InstanceFailureReason.INVALID_NUMBER_FORMAT, Replace.ERROR.with(e));
         }
 
-        return Attempt.success(new ExactDestinationInstance(this, worldManager, worldName, position));
+        return Attempt.success(new ExactDestinationInstance(this, worldManager, world.getName(), position));
     }
 
     //TODO: Extract to a world finder class

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

@@ -6,6 +6,7 @@ import co.aikar.locales.MessageKey;
 import co.aikar.locales.MessageKeyProvider;
 import jakarta.inject.Inject;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jvnet.hk2.annotations.Service;
@@ -14,13 +15,11 @@ 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.locale.MVCorei18n;
-import org.mvplugins.multiverse.core.locale.message.MessageReplacement;
 import org.mvplugins.multiverse.core.locale.message.MessageReplacement.Replace;
 import org.mvplugins.multiverse.core.teleportation.LocationManipulation;
 import org.mvplugins.multiverse.core.utils.REPatterns;
 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.MultiverseWorld;
 import org.mvplugins.multiverse.core.world.WorldManager;
 import org.mvplugins.multiverse.core.world.entrycheck.WorldEntryCheckerProvider;
@@ -56,6 +55,19 @@ public final class WorldDestination implements Destination<WorldDestination, Wor
         return "w";
     }
 
+    /**
+     * Directly create a world destination instance for a Multiverse World without any string parsing validation needed.
+     *
+     * @param multiverseWorld   The destination's target world.
+     * @return The destination instance with the target world.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public @NotNull WorldDestinationInstance fromWorld(MultiverseWorld multiverseWorld) {
+        return new WorldDestinationInstance(this, multiverseWorld, null, -1.0f);
+    }
+
     /**
      * {@inheritDoc}
      */

src/main/java/org/mvplugins/multiverse/core/display/handlers/PagedSendHandler.java

@@ -2,8 +2,6 @@ package org.mvplugins.multiverse.core.display.handlers;
 
 import java.util.List;
 
-import co.aikar.commands.BukkitCommandIssuer;
-import org.bukkit.ChatColor;
 import org.bukkit.command.ConsoleCommandSender;
 import org.jetbrains.annotations.NotNull;
 import org.mvplugins.multiverse.core.command.MVCommandIssuer;
@@ -69,12 +67,12 @@ public class PagedSendHandler extends BaseSendHandler<PagedSendHandler> {
     private void sendPaged(@NotNull MVCommandIssuer issuer, @NotNull List<String> content) {
         int totalPages = (content.size() + linesPerPage - 1) / linesPerPage; // Basically just divide round up
         if (targetPage < 1 || targetPage > totalPages) {
-            issuer.sendMessage(String.format("%sInvalid page number. Please enter a page number between 1 and %s", ChatColor.RED, totalPages));
+            issuer.sendMessage(MVCorei18n.CONTENTDISPLAY_INVALIDPAGE, replace("{total}").with(totalPages));
             return;
         }
 
         if (filter.needToFilter()) {
-            issuer.sendMessage("{page} {filter}",
+            issuer.sendMessage(MVCorei18n.CONTENTDISPLAY_PAGEFILTER,
                     replace("{page}").with(Message.of(MVCorei18n.CONTENTDISPLAY_PAGE,
                             replace("{current}").with(targetPage),
                             replace("{total}").with(totalPages))),

src/main/java/org/mvplugins/multiverse/core/dynamiclistener/DynamicListenerRegistration.java

@@ -35,7 +35,7 @@ public final class DynamicListenerRegistration {
     private static final boolean hasEventExecutorCreate;
 
     static {
-        hasEventExecutorCreate = ReflectHelper.getMethod(EventExecutor.class, "create", Method.class, Class.class) != null;
+        hasEventExecutorCreate = ReflectHelper.hasMethod(EventExecutor.class, "create", Method.class, Class.class);
     }
 
     private final EventPriorityMapper eventPriorityMapper;
@@ -98,18 +98,22 @@ public final class DynamicListenerRegistration {
         }
 
         method.setAccessible(true);
-        Object methodOutput = ReflectHelper.invokeMethod(listener, method);
-        if (!(methodOutput instanceof EventRunnable eventRunnable)) {
-            Logging.warning("Event method %s in %s did not return a SingleEventListener",
-                    method.getName(), listener.getClass().getName());
-            return;
-        }
-        EventExecutor executor = new EventRunnableExecutor<>(eventClass, eventRunnable);
-        EventPriority priority = getDynamicEventPriority(method);
-        boolean ignoreCancelled = isIgnoreIfCancelled(method);
 
-        Logging.finest("Registering dynamic event for %s with priority %s", eventClass.getName(), priority);
-        Bukkit.getPluginManager().registerEvent(eventClass, listener, priority, executor, plugin, ignoreCancelled);
+        ReflectHelper.tryInvokeMethod(listener, method)
+                .onFailure(e -> Logging.warning("Failed to invoke event method %s in %s: $s",
+                        method.getName(), listener.getClass().getName(), e.getMessage()))
+                .filter(EventRunnable.class::isInstance)
+                .onFailure(e -> Logging.warning("Event method %s in %s did not return an EventRunnable instance!",
+                        method.getName(), listener.getClass().getName()))
+                .map(EventRunnable.class::cast)
+                .map(eventRunnable -> new EventRunnableExecutor<>(eventClass, eventRunnable))
+                .peek(executor -> {
+                    EventPriority priority = getDynamicEventPriority(method);
+                    boolean ignoreCancelled = isIgnoreIfCancelled(method);
+                    Bukkit.getPluginManager().registerEvent(eventClass, listener, priority, executor, plugin, ignoreCancelled);
+                    Logging.finest("Registered dynamic event: %s, priority: %s, ignore if cancelled: %s",
+                            eventClass.getName(), priority, ignoreCancelled);
+                });
     }
 
     private Class<? extends Event> getEventClass(Method method) {
@@ -129,13 +133,12 @@ public final class DynamicListenerRegistration {
     }
 
     private Class<? extends Event> getEventClassFromString(String className) {
-        Class<?> annotatedClass = ReflectHelper.getClass(className);
-        if (annotatedClass == null || !Event.class.isAssignableFrom(annotatedClass)) {
-            // Usually means the server software used did not implement the event
-            Logging.fine("Event class does not exist: %s", className);
-            return null;
-        }
-        return annotatedClass.asSubclass(Event.class);
+        return ReflectHelper.tryGetClass(className)
+                .onFailure(throwable -> Logging.fine("Failed to find event class: %s", className))
+                .filter(Event.class::isAssignableFrom)
+                .onFailure(throwable -> Logging.warning("Class is not an Event: %s", className))
+                .map(clazz -> (Class<? extends Event>) clazz.asSubclass(Event.class))
+                .getOrNull();
     }
 
     private EventPriority getDynamicEventPriority(Method method) {

src/main/java/org/mvplugins/multiverse/core/event/MVDumpsDebugInfoEvent.java

@@ -7,6 +7,7 @@ import java.io.FileReader;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Map;
 
 import com.dumptruckman.minecraft.util.Logging;
@@ -24,7 +25,7 @@ public final class MVDumpsDebugInfoEvent extends Event {
 
     public MVDumpsDebugInfoEvent() {
         debugInfoBuilder = new StringBuilder();
-        detailedDebugInfo = new HashMap<>();
+        detailedDebugInfo = new LinkedHashMap<>();
     }
 
     private static final HandlerList HANDLERS = new HandlerList();

src/main/java/org/mvplugins/multiverse/core/event/world/MVWorldClonedEvent.java

@@ -1,8 +1,11 @@
 package org.mvplugins.multiverse.core.event.world;
 
 import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
+import org.mvplugins.multiverse.core.world.MultiverseWorld;
 
 /**
  * Called when a world has been successfully cloned.
@@ -10,14 +13,24 @@ import org.mvplugins.multiverse.core.world.LoadedMultiverseWorld;
 public final class MVWorldClonedEvent extends MultiverseWorldEvent<LoadedMultiverseWorld> {
     private static final HandlerList HANDLERS = new HandlerList();
 
-    private final LoadedMultiverseWorld fromWorld;
+    private final MultiverseWorld fromWorld;
 
-    public MVWorldClonedEvent(LoadedMultiverseWorld world, LoadedMultiverseWorld fromWorld) {
+    public MVWorldClonedEvent(LoadedMultiverseWorld world, MultiverseWorld fromWorld) {
         super(world);
         this.fromWorld = fromWorld;
     }
 
-    public LoadedMultiverseWorld getFromWorld() {
+    /**
+     * @deprecated Cloning can be done from unloaded worlds as well. Use {@link #getSourceWorld()} instead.
+     */
+    @Deprecated(forRemoval = true, since = "5.6")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
+    public @Nullable LoadedMultiverseWorld getFromWorld() {
+        return fromWorld.asLoadedWorld().getOrNull();
+    }
+
+    @ApiStatus.AvailableSince("5.6")
+    public @NotNull MultiverseWorld getSourceWorld() {
         return fromWorld;
     }
 
@@ -37,5 +50,4 @@ public final class MVWorldClonedEvent extends MultiverseWorldEvent<LoadedMultive
     public static HandlerList getHandlerList() {
         return HANDLERS;
     }
-
 }

src/main/java/org/mvplugins/multiverse/core/exceptions/MultiverseException.java

@@ -1,6 +1,5 @@
 package org.mvplugins.multiverse.core.exceptions;
 
-import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import org.mvplugins.multiverse.core.locale.message.LocalizableMessage;

src/main/java/org/mvplugins/multiverse/core/exceptions/command/MVInvalidCommandArgument.java

@@ -1,6 +1,9 @@
 package org.mvplugins.multiverse.core.exceptions.command;
 
 import co.aikar.commands.InvalidCommandArgument;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.mvplugins.multiverse.core.locale.message.LocalizableMessage;
 import org.mvplugins.multiverse.core.locale.message.LocalizedMessage;
 import org.mvplugins.multiverse.core.locale.message.Message;
 
@@ -9,21 +12,41 @@ import org.mvplugins.multiverse.core.locale.message.Message;
  */
 public class MVInvalidCommandArgument extends InvalidCommandArgument {
 
-    public static MVInvalidCommandArgument of(Message message) {
+    @ApiStatus.AvailableSince("5.7")
+    public static MVInvalidCommandArgument causeBy(Throwable throwable) {
+        return causeBy(throwable, true);
+    }
+
+    @ApiStatus.AvailableSince("5.7")
+    public static MVInvalidCommandArgument causeBy(Throwable throwable, boolean showSyntax) {
+        if (throwable instanceof LocalizableMessage localizableMessage) {
+            Message message = localizableMessage.getLocalizableMessage();
+            return message == null
+                    ? new MVInvalidCommandArgument(throwable.getLocalizedMessage(), showSyntax)
+                    : of(message, showSyntax);
+        }
+        return new MVInvalidCommandArgument(throwable.getLocalizedMessage(), showSyntax);
+    }
+
+    public static MVInvalidCommandArgument of(@NotNull Message message) {
         return of(message, true);
     }
 
-    public static MVInvalidCommandArgument of(Message message, boolean showSyntax) {
+    public static MVInvalidCommandArgument of(@NotNull Message message, boolean showSyntax) {
         return message instanceof LocalizedMessage
                 ? new MVInvalidCommandArgument((LocalizedMessage) message, showSyntax)
                 : new MVInvalidCommandArgument(message, showSyntax);
     }
 
+    private MVInvalidCommandArgument(String message, boolean showSyntax) {
+        super(message, showSyntax);
+    }
+
     private MVInvalidCommandArgument(Message message, boolean showSyntax) {
         super(message.formatted(), showSyntax);
     }
 
     private MVInvalidCommandArgument(LocalizedMessage message, boolean showSyntax) {
-        super(message.getMessageKey(), showSyntax, message.getReplacements());
+        super(message.getMessageKey(), showSyntax, message.getRawReplacements());
     }
 }

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

@@ -7,8 +7,10 @@
 
 package org.mvplugins.multiverse.core.listeners;
 
+import com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent;
 import com.dumptruckman.minecraft.util.Logging;
 import jakarta.inject.Inject;
+import org.bukkit.entity.Entity;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Listener;
@@ -18,12 +20,19 @@ import org.bukkit.event.entity.EntityRegainHealthEvent;
 import org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason;
 import org.bukkit.event.entity.EntitySpawnEvent;
 import org.bukkit.event.entity.FoodLevelChangeEvent;
+import org.bukkit.event.world.ChunkLoadEvent;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.jvnet.hk2.annotations.Service;
 
+import org.mvplugins.multiverse.core.dynamiclistener.EventRunnable;
+import org.mvplugins.multiverse.core.dynamiclistener.annotations.EventClass;
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.EventMethod;
+import org.mvplugins.multiverse.core.utils.compatibility.EntityCompatibility;
 import org.mvplugins.multiverse.core.world.WorldManager;
 
+import java.util.Arrays;
+
 /**
  * Multiverse's Entity {@link Listener}.
  */
@@ -77,6 +86,34 @@ final class MVEntityListener implements CoreListener {
                 });
     }
 
+    /**
+     * Fired before other spawn checks is done, helps in performance by cancelling early and preventing unnecessary
+     * checks for spawn reasons that are not allowed in the world.
+     *
+     * @return Event wrapper
+     */
+    @EventClass("com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent")
+    EventRunnable<?> preCreatureSpawn() {
+        return new EventRunnable<PreCreatureSpawnEvent>() {
+            @Override
+            public void onEvent(PreCreatureSpawnEvent event) {
+                // Always allow custom command and plugins to spawn creatures
+                if (isAlwaysAllowedSpawnReason(event.getReason())) {
+                    return;
+                }
+
+                worldManager.getLoadedWorld(event.getSpawnLocation().getWorld())
+                        .peek(world -> {
+                            if (!world.getEntitySpawnConfig().shouldAllowSpawn(event.getType())) {
+                                Logging.finest("Cancelling Pre Creature Spawn Event for: " + event.getType());
+                                event.setCancelled(true);
+                                event.setShouldAbortSpawn(true);
+                            }
+                        });
+            }
+        };
+    }
+
     /**
      * Handle Spawn Category settings.
      *
@@ -89,16 +126,13 @@ final class MVEntityListener implements CoreListener {
         }
 
         // Always allow custom command and plugins to spawn creatures
-        if (event.getSpawnReason() == SpawnReason.CUSTOM
-                || event.getSpawnReason() == SpawnReason.COMMAND
-                || event.getSpawnReason() == SpawnReason.BREEDING
-                || event.getSpawnReason() == SpawnReason.SPAWNER_EGG) {
+        if (isAlwaysAllowedSpawnReason(event.getSpawnReason())) {
             return;
         }
 
         worldManager.getLoadedWorld(event.getEntity().getWorld())
                 .peek(world -> {
-                    if (!world.getEntitySpawnConfig().shouldAllowSpawn(event.getEntity())) {
+                    if (!world.getEntitySpawnConfig().shouldAllowSpawn(event.getEntityType())) {
                         Logging.finest("Cancelling Creature Spawn Event for: " + event.getEntity());
                         event.setCancelled(true);
                     }
@@ -117,10 +151,34 @@ final class MVEntityListener implements CoreListener {
 
         worldManager.getLoadedWorld(event.getEntity().getWorld())
                 .peek(world -> {
-                    if (!world.getEntitySpawnConfig().shouldAllowSpawn(event.getEntity())) {
+                    if (!world.getEntitySpawnConfig().shouldAllowSpawn(event.getEntityType())) {
                         Logging.finest("Cancelling Entity Spawn Event for: " + event.getEntity());
                         event.setCancelled(true);
                     }
                 });
     }
+
+    @EventMethod
+    void chunkLoad(ChunkLoadEvent event) {
+        worldManager.getLoadedWorld(event.getWorld())
+                .peek(world -> {
+                    long count = Arrays.stream(event.getChunk().getEntities())
+                            .filter(entity -> !(entity instanceof Player))
+                            .filter(entity -> !isAlwaysAllowedSpawnReason(EntityCompatibility.getEntitySpawnReason(entity)))
+                            .filter(entity -> !world.getEntitySpawnConfig().shouldAllowSpawn(entity))
+                            .peek(Entity::remove)
+                            .count();
+                    if (count > 0) {
+                        Logging.finest("Removed %d entities from chunk %d, %d in world %s due to spawn category settings.",
+                                count, event.getChunk().getX(), event.getChunk().getZ(), event.getWorld().getName());
+                    }
+                });
+    }
+
+    private boolean isAlwaysAllowedSpawnReason(@Nullable SpawnReason reason) {
+        return reason == SpawnReason.CUSTOM
+                || reason == SpawnReason.COMMAND
+                || reason == SpawnReason.BREEDING
+                || reason == SpawnReason.SPAWNER_EGG;
+    }
 }

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

@@ -18,9 +18,11 @@ import org.bukkit.event.player.PlayerInteractEvent;
 import org.bukkit.event.world.PortalCreateEvent;
 import org.jetbrains.annotations.NotNull;
 import org.jvnet.hk2.annotations.Service;
+import org.mvplugins.multiverse.core.command.MVCommandManager;
 import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.EventMethod;
 import org.mvplugins.multiverse.core.dynamiclistener.annotations.IgnoreIfCancelled;
+import org.mvplugins.multiverse.core.locale.MVCorei18n;
 import org.mvplugins.multiverse.core.world.WorldManager;
 
 import static org.bukkit.PortalType.CUSTOM;
@@ -33,11 +35,15 @@ final class MVPortalListener implements CoreListener {
 
     private final CoreConfig config;
     private final WorldManager worldManager;
+    private final MVCommandManager commandManager;
 
     @Inject
-    MVPortalListener(@NotNull CoreConfig config, @NotNull WorldManager worldManager) {
+    MVPortalListener(@NotNull CoreConfig config,
+                     @NotNull WorldManager worldManager,
+                     @NotNull MVCommandManager commandManager) {
         this.config = config;
         this.worldManager = worldManager;
+        this.commandManager = commandManager;
     }
 
     /**
@@ -59,6 +65,7 @@ final class MVPortalListener implements CoreListener {
             if (!world.getPortalForm().isPortalAllowed(targetType)) {
                 Logging.fine("Cancelling creation of %s portal because portalForm disallows.", targetType);
                 event.setCancelled(true);
+                commandManager.getCommandIssuer(event.getEntity()).sendError(MVCorei18n.PORTALFORM_DISABLED_NETHER);
             }
         }).onEmpty(() ->
                 Logging.fine("World '%s' is not managed by Multiverse! Ignoring at PortalCreateEvent.",
@@ -101,6 +108,7 @@ final class MVPortalListener implements CoreListener {
             if (!world.getPortalForm().isPortalAllowed(PortalType.ENDER)) {
                 Logging.fine("Cancelling creation of ENDER portal because portalForm disallows.");
                 event.setCancelled(true);
+                commandManager.getCommandIssuer(event.getPlayer()).sendError(MVCorei18n.PORTALFORM_DISABLED_END);
             }
         }).onEmpty(() ->
                 Logging.fine("World '%s' is not managed by Multiverse! Ignoring at PlayerInteractEvent.",

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

@@ -20,6 +20,26 @@ public enum MVCorei18n implements MessageKeyProvider {
     // configuration
     CONFIG_SAVE_FAILED,
     CONFIG_NODE_NOTFOUND,
+    CONFIG_NODE_INVALIDYAMLKEY,
+    CONFIG_STRING_PARSER_INVALIDBOOLEAN,
+    CONFIG_STRING_PARSER_INVALIDINTEGER,
+    CONFIG_STRING_PARSER_INVALIDDOUBLE,
+    CONFIG_STRING_PARSER_INVALIDFLOAT,
+    CONFIG_STRING_PARSER_INVALIDLONG,
+    CONFIG_STRING_PARSER_INVALIDMATERIAL,
+
+    // core config
+    CORE_CONFIG_CUSTOMPORTALSEARCHRADIUS_NONNEGATIVE,
+    CORE_CONFIG_CONFIRMTIMEOUT_POSITIVE,
+    CORE_CONFIG_DEBUGLEVEL_RANGE,
+
+    // /mv anchor
+    ANCHOR_DELETE_SUCCESS,
+    ANCHOR_DELETE_FAILURE,
+    ANCHOR_LIST_HEADER,
+    ANCHOR_LIST_ENTRY,
+    ANCHOR_SET_SUCCESS,
+    ANCHOR_SET_FAILURE,
 
     // /mv check
     CHECK_DESCRIPTION,
@@ -91,8 +111,18 @@ public enum MVCorei18n implements MessageKeyProvider {
 
     // /mv dumps
     DUMPS_DESCRIPTION,
+    DUMPS_STARTING,
     DUMPS_URL_LIST,
 
+    // /mv entity-spawn-config
+    ENTITYSPAWNCONFIG_INFO_HEADER,
+    ENTITYSPAWNCONFIG_INFO_CATEGORY,
+    ENTITYSPAWNCONFIG_INFO_SPAWN,
+    ENTITYSPAWNCONFIG_INFO_TICKRATE,
+    ENTITYSPAWNCONFIG_INFO_EXCEPTIONS,
+    ENTITYSPAWNCONFIG_MODIFY_SUCCESS,
+    ENTITYSPAWNCONFIG_MODIFY_FAILURE,
+
     // /mv gamerule set
     GAMERULE_SET_DESCRIPTION,
     GAMERULE_SET_GAMERULE_DESCRIPTION,
@@ -119,7 +149,12 @@ public enum MVCorei18n implements MessageKeyProvider {
     // /mv generators
     GENERATORS_DESCRIPTION,
     GENERATORS_DESCRIPTION_FLAGS,
+    GENERATORS_HEADER,
     GENERATORS_EMPTY,
+    GENERATORS_INFO_PLUGIN,
+    GENERATORS_INFO_EXAMPLEUSAGES,
+    GENERATORS_INFO_USAGES,
+    GENERATORS_INFO_INFOLINK,
 
     // /mv import
     IMPORT_DESCRIPTION,
@@ -146,6 +181,19 @@ public enum MVCorei18n implements MessageKeyProvider {
     LOAD_LOADING,
     LOAD_SUCCESS,
 
+    // /mv meta info
+    META_INFO_DESCRIPTION,
+    META_INFO_WORLD_DESCRIPTION,
+    META_INFO_HEADER,
+    META_INFO_NOCONTENT,
+
+    // /mv meta modify
+    META_MODIFY_SET_SUCCESS,
+    META_MODIFY_SET_FAILURE,
+    META_MODIFY_REMOVE_SUCCESS,
+    META_MODIFY_REMOVE_FAILURE,
+    META_MODIFY_INVALIDACTION,
+
     // /mv modify
     MODIFY_DESCRIPTION,
     MODIFY_WORLD_DESCRIPTION,
@@ -158,6 +206,13 @@ public enum MVCorei18n implements MessageKeyProvider {
     MODIFY_FAILURE,
     MODIFY_FAILURE_NOVALUE,
 
+    // /mv purge-all-entities
+    PURGEALLENTITIES_SUCCESS,
+    PURGEALLENTITIES_SUCCESS_CATEGORIES,
+
+    // /mv purge-entities
+    PURGEENTITIES_SUCCESS,
+
     // /mv regen
     REGEN_DESCRIPTION,
     REGEN_WORLD_DESCRIPTION,
@@ -192,6 +247,8 @@ public enum MVCorei18n implements MessageKeyProvider {
     // /mv spawn
     SPAWN_DESCRIPTION,
     SPAWN_PLAYER_DESCRIPTION,
+    SPAWN_NOTMVWORLD,
+    SPAWN_NOPERMISSION,
     SPAWN_SUCCESS,
     SPAWN_FAILED,
 
@@ -200,6 +257,9 @@ public enum MVCorei18n implements MessageKeyProvider {
     TELEPORT_PLAYER_DESCRIPTION,
     TELEPORT_DESTINATION_DESCRIPTION,
     TELEPORT_TOOMANYPLAYERS,
+    TELEPORT_NOPERMISSION_SELF,
+    TELEPORT_NOPERMISSION_OTHER,
+    TELEPORT_NOPERMISSION_ALL,
     TELEPORT_SUCCESS,
     TELEPORT_FAILED,
 
@@ -250,9 +310,26 @@ public enum MVCorei18n implements MessageKeyProvider {
     WORLDBORDER_WARNINGTIME_NOTHINGCHANGED,
     WORLDBORDER_WARNINGTIME_SUCCESS,
 
+    WORLDBORDER_ROUNDOFF_WARNING,
+
     // commands error
     COMMANDS_ERROR_PLAYERSONLY,
     COMMANDS_ERROR_MULTIVERSEWORLDONLY,
+    COMMANDS_ERROR_LOADEDMULTIVERSEWORLD_PLAYERSONLY,
+    COMMANDS_ERROR_LOADEDMULTIVERSEWORLD_ISSUER,
+    COMMANDS_ERROR_LOADEDMULTIVERSEWORLD_INPUTCONSOLE,
+    COMMANDS_ERROR_LOADEDMULTIVERSEWORLD_INPUT,
+    COMMANDS_ERROR_MULTIVERSEWORLD_PLAYERSONLY,
+    COMMANDS_ERROR_MULTIVERSEWORLD_ISSUER,
+    COMMANDS_ERROR_MULTIVERSEWORLD_INPUTCONSOLE,
+    COMMANDS_ERROR_MULTIVERSEWORLD_INPUT,
+    COMMANDS_ERROR_PLAYER_ISSUERINPUT,
+    COMMANDS_ERROR_PLAYER_INPUT,
+    COMMANDS_ERROR_PLAYER_SELECTOR,
+    COMMANDS_ERROR_PLAYERS_INPUT,
+    COMMANDS_ERROR_RESOLVE_PLAYER,
+    COMMANDS_ERROR_RESOLVE_INPUT,
+    COMMANDS_ERROR_REMOVEPLAYERS_NODEFAULT,
 
     // entry check
     ENTRYCHECK_BLACKLISTED,
@@ -269,7 +346,10 @@ public enum MVCorei18n implements MessageKeyProvider {
 
     // multiverse parse destination failure reason
     DESTINATION_ANCHOR_FAILUREREASON_ANCHORNOTFOUND,
+    DESTINATION_ANCHOR_DISPLAY,
     DESTINATION_BED_FAILUREREASON_PLAYERNOTFOUND,
+    DESTINATION_BED_DISPLAY_OWN,
+    DESTINATION_BED_DISPLAY_OTHER,
     DESTINATION_CANNON_FAILUREREASON_INVALIDFORMAT,
     DESTINATION_EXACT_FAILUREREASON_INVALIDFORMAT,
     DESTINATION_PLAYER_FAILUREREASON_PLAYERNOTFOUND,
@@ -278,6 +358,10 @@ public enum MVCorei18n implements MessageKeyProvider {
     DESTINATION_SHARED_FAILUREREASON_WORLDNOTFOUND,
     DESTINATION_PARSE_FAILUREREASON_INVALIDDESTINATIONID,
 
+    // portal form disabled
+    PORTALFORM_DISABLED_END,
+    PORTALFORM_DISABLED_NETHER,
+
     // teleport failure reason
     TELEPORTFAILUREREASON_NULL_DESTINATION,
     TELEPORTFAILUREREASON_NULL_LOCATION,
@@ -287,11 +371,17 @@ public enum MVCorei18n implements MessageKeyProvider {
     TELEPORTFAILUREREASON_TELEPORT_FAILED_EXCEPTION,
     TELEPORTFAILUREREASON_EVENT_CANCELLED,
 
+    // alias name conflict
+    ALIASNAMECONFLICT_DETECTED,
+    ALIASNAMECONFLICT_DUPLICATEALIAS,
+    ALIASNAMECONFLICT_DUPLICATEWORLDNAME,
+
     // world manager result
     CLONEWORLD_INVALIDWORLDNAME,
     CLONEWORLD_WORLDEXISTFOLDER,
     CLONEWORLD_WORLDEXISTUNLOADED,
     CLONEWORLD_WORLDEXISTLOADED,
+    CLONEWORLD_FROMWORLDFOLDERINVALID,
     CLONEWORLD_COPYFAILED,
 
     CREATEWORLD_INVALIDWORLDNAME,
@@ -309,12 +399,14 @@ public enum MVCorei18n implements MessageKeyProvider {
     IMPORTWORLD_WORLDEXISTLOADED,
     IMPORTWORLD_WORLDFOLDERINVALID,
     IMPORTWORLD_BUKKITENVIRONMENTMISMATCH,
+    IMPORTWORLD_BUKKITNAMESPACEDKEYMISMATCH,
 
     LOADWORLD_WORLDALREADYLOADING,
     LOADWORLD_WORLDNONEXISTENT,
     LOADWORLD_WORLDEXISTFOLDER,
     LOADWORLD_WORLDEXISTLOADED,
     LOADWORLD_BUKKITENVIRONMENTMISMATCH,
+    LOADWORLD_BUKKITNAMESPACEDKEYMISMATCH,
 
     REMOVEWORLD_WORLDNONEXISTENT,
 
@@ -328,6 +420,9 @@ public enum MVCorei18n implements MessageKeyProvider {
     WORLDCREATOR_BUKKITCREATIONFAILED,
 
     // queue command result
+    QUEUECOMMAND_DEFAULTPROMPT,
+    QUEUECOMMAND_PROMPT,
+    QUEUECOMMAND_EXPIRED,
     QUEUECOMMAND_NOCOMMANDINQUEUE,
     QUEUECOMMAND_INVALIDOTP,
     QUEUECOMMAND_COMMANDEXECUTIONERROR,
@@ -336,6 +431,7 @@ public enum MVCorei18n implements MessageKeyProvider {
     CONTENTDISPLAY_NOCONTENT,
     CONTENTDISPLAY_FILTER,
     CONTENTDISPLAY_PAGE,
+    CONTENTDISPLAY_PAGEFILTER,
     CONTENTDISPLAY_INVALIDPAGE,
     CONTENTDISPLAY_NULL,
     CONTENTDISPLAY_EMPTY,
@@ -351,12 +447,21 @@ public enum MVCorei18n implements MessageKeyProvider {
     EXCEPTION_POSITIONPARSE_INVALIDCOORDINATES,
     EXCEPTION_POSITIONPARSE_INVALIDNUMBER,
 
+    // world key parse failures
+    WORLDKEYPARSE_EMPTY,
+    WORLDKEYPARSE_INVALIDWORLDNAME,
+    WORLDKEYPARSE_INVALIDNAMESPACEDKEY,
+    WORLDKEYPARSE_NAMESPACEDKEYUNSUPPORTED,
+
     // generic
     GENERIC_SUCCESS,
     GENERIC_FAILURE,
     GENERIC_ERROR,
+    GENERIC_ERROR_DETAILS,
     GENERIC_NULL,
     GENERIC_YOU,
+    GENERIC_PLAYERCOUNT,
+    GENERIC_TELEPORTPLAYERS_FAILED,
     ;
 
     // END CHECKSTYLE-SUPPRESSION: Javadoc

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

@@ -1,17 +1,23 @@
 package org.mvplugins.multiverse.core.locale.message;
 
-import java.util.Objects;
-
 import co.aikar.commands.ACFUtil;
 import co.aikar.commands.CommandIssuer;
 import co.aikar.commands.Locales;
 import co.aikar.locales.MessageKey;
 import co.aikar.locales.MessageKeyProvider;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 public final class LocalizedMessage extends Message implements MessageKeyProvider {
 
+    private static @Nullable Locales locales;
+
+    @ApiStatus.Internal
+    public static void setDefaultLocalesManager(@Nullable Locales locales) {
+        LocalizedMessage.locales = locales;
+    }
+
     private final @NotNull MessageKeyProvider messageKeyProvider;
 
     LocalizedMessage(
@@ -22,11 +28,33 @@ public final class LocalizedMessage extends Message implements MessageKeyProvide
         this.messageKeyProvider = messageKeyProvider;
     }
 
+    /**
+     * {@inheritDoc}
+     */
     @Override
     public MessageKey getMessageKey() {
         return messageKeyProvider.getMessageKey();
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull String[] getReplacements() {
+        return locales == null ? super.getReplacements() : getReplacements(locales, null);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull String formatted() {
+        return locales == null ? super.formatted() : formatted(locales, null);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
     @Override
     public @NotNull String formatted(@NotNull Locales locales, @Nullable CommandIssuer commandIssuer) {
         String[] parsedReplacements = getReplacements(locales, commandIssuer);

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

@@ -6,9 +6,11 @@ import co.aikar.commands.ACFUtil;
 import co.aikar.commands.CommandIssuer;
 import co.aikar.commands.Locales;
 import co.aikar.locales.MessageKeyProvider;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.mvplugins.multiverse.core.command.MVCommandManager;
 
 /**
  * A message that can be formatted with replacements and localized.
@@ -81,15 +83,45 @@ public sealed class Message permits LocalizedMessage {
     }
 
     /**
-     * Gets the replacements for this message.
+     * Gets the replacements for this message. This is the raw, non-localized parsing of replacements.
      * <br/>
      * This array is guaranteed to be of even length and suitable for use with
      * {@link ACFUtil#replaceStrings(String, String...)}.
      *
      * @return The replacements
+     *
+     * @since 5.8
+     */
+    @ApiStatus.AvailableSince("5.8")
+    public @NotNull String[] getRawReplacements() {
+        return toReplacementsArray(replacements);
+    }
+
+    /**
+     * Gets the replacements for this message with localization support when the plugin has loaded and injected its
+     * default {@link MVCommandManager#getLocales()} instance.
+     * Otherwise, it will fall back to use {@link getRawReplacements()}.
+     *
+     * @return The replacements
      */
     public @NotNull String[] getReplacements() {
-        return toReplacementsArray(replacements);
+        return getRawReplacements();
+    }
+
+    /**
+     * Gets the replacements for this message with localization support based on the command issuer's locale config.
+     * <br/>
+     * This array is guaranteed to be of even length and suitable for use with
+     * {@link ACFUtil#replaceStrings(String, String...)}.
+     *
+     * @param issuer The command issuer the message is for
+     * @return The replacements
+     *
+     * @since 5.8
+     */
+    @ApiStatus.AvailableSince("5.8")
+    public @NotNull String[] getReplacements(@NotNull CommandIssuer issuer) {
+        return getReplacements(issuer.getManager().getLocales(), issuer);
     }
 
     /**
@@ -116,20 +148,36 @@ public sealed class Message permits LocalizedMessage {
     }
 
     /**
-     * Gets the formatted message.
+     * Gets the raw formatted message.
      * <br/>
      * This is the raw, non-localized message with replacements applied.
+     * This method will never use the locale message key.
      *
      * @return The formatted message
+     *
+     * @since 5.8
      */
-    public @NotNull String formatted() {
-        String[] parsedReplacements = getReplacements();
+    @ApiStatus.AvailableSince("5.8")
+    public @NotNull String rawFormatted() {
+        String[] parsedReplacements = getRawReplacements();
         if (parsedReplacements.length == 0) {
             return raw();
         }
         return ACFUtil.replaceStrings(message, parsedReplacements);
     }
 
+    /**
+     * Gets the formatted message.
+     * <br/>
+     * This is the localized message with replacements applied when the plugin has loaded and injected its default
+     * {@link MVCommandManager#getLocales()} instance. Otherwise, it will fall back to use {@link rawFormatted()}.
+     *
+     * @return The formatted message
+     */
+    public @NotNull String formatted() {
+        return rawFormatted();
+    }
+
     /**
      * Gets the formatted message from localization data.
      * <br/>
@@ -146,9 +194,9 @@ public sealed class Message permits LocalizedMessage {
      * Gets the formatted message from localization data.
      * <br/>
      * This is the localized message with replacements applied. The message is localized using the locale of the given
-     * command issuer, if not null.
+     * command issuer.
      *
-     * @param commandIssuer The command issuer the message is for, or null for the console (default locale)
+     * @param commandIssuer The command issuer the message is for.
      * @return The formatted, localized message
      */
     public @NotNull String formatted(@NotNull CommandIssuer commandIssuer) {
@@ -178,7 +226,7 @@ public sealed class Message permits LocalizedMessage {
         int i = 0;
         for (MessageReplacement replacement : replacements) {
             replacementsArray[i++] = replacement.getKey();
-            replacementsArray[i++] = replacement.getReplacement().fold(s -> s, Message::formatted);
+            replacementsArray[i++] = replacement.getReplacement().fold(s -> s, Message::rawFormatted);
         }
         return replacementsArray;
     }

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

@@ -1,6 +1,7 @@
 package org.mvplugins.multiverse.core.locale.message;
 
 import io.vavr.control.Either;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -107,6 +108,7 @@ public final class MessageReplacement {
         GAMERULE(replace("{gamerule}")),
         LOCATION(replace("{location}")),
         NAME(replace("{name}")),
+        NAMESPACE(replace("{namespace}")),
         PLAYER(replace("{player}")),
         REASON(replace("{reason}")),
         VALUE(replace("{value}")),

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

@@ -147,9 +147,10 @@ public abstract class MultiverseModule extends JavaPlugin {
         Try.of(() -> commandManagerProvider.get())
                 .mapTry(MVCommandManager::getLocales)
                 .andThen(pluginLocales -> {
-                    pluginLocales.addFileResClassLoader(this);
                     pluginLocales.addBundleClassLoader(this.getClassLoader());
+                    pluginLocales.addFileResClassLoader(this);
                     pluginLocales.addMessageBundles(this.getName().toLowerCase(Locale.ENGLISH));
+                    pluginLocales.loadLanguages();
                 })
                 .onFailure(e -> {
                     Logging.severe("Failed to register locales");

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

@@ -264,7 +264,8 @@ public final class AsyncSafetyTeleporterAction {
                 Logging.finer("Teleported async %s to %s", teleportee.getName(), location);
                 return Attempt.success(null);
             }
-            Logging.warning("Failed to async teleport %s to %s", teleportee.getName(), location);
+            Logging.warning("Failed to async teleport %s to %s. This is usually caused by another " +
+                    "plugin canceling the teleport event and not a bug with Multiverse.", teleportee.getName(), location);
             return Attempt.failure(TeleportFailureReason.TELEPORT_FAILED);
         });
     }

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

@@ -1,8 +1,8 @@
 package org.mvplugins.multiverse.core.utils;
 
 import org.jetbrains.annotations.ApiStatus;
-import org.jspecify.annotations.NonNull;
-import org.jspecify.annotations.Nullable;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.Collection;
 import java.util.HashMap;
@@ -62,7 +62,7 @@ public class CaseInsensitiveStringMap<T> implements Map<String, T> {
     }
 
     @Override
-    public void putAll(@NonNull Map<? extends String, ? extends T> m) {
+    public void putAll(@NotNull Map<? extends String, ? extends T> m) {
         m.forEach((key, value) -> map.put(normalizeKey(key), value));
     }
 
@@ -72,17 +72,17 @@ public class CaseInsensitiveStringMap<T> implements Map<String, T> {
     }
 
     @Override
-    public @NonNull Set<String> keySet() {
+    public @NotNull Set<String> keySet() {
         return map.keySet();
     }
 
     @Override
-    public @NonNull Collection<T> values() {
+    public @NotNull Collection<T> values() {
         return map.values();
     }
 
     @Override
-    public @NonNull Set<Entry<String, T>> entrySet() {
+    public @NotNull Set<Entry<String, T>> entrySet() {
         return map.entrySet();
     }
 

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

@@ -18,6 +18,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import com.dumptruckman.minecraft.util.Logging;
@@ -210,28 +211,31 @@ public final class FileUtils {
 
         private final Path sourceDir;
         private final Path targetDir;
-        private final List<String> excludeFiles;
+        private final List<Path> excludeFiles;
 
         private CopyDirFileVisitor(@NotNull Path sourceDir, @NotNull Path targetDir, @NotNull List<String> excludeFiles) {
             this.sourceDir = sourceDir;
             this.targetDir = targetDir;
-            this.excludeFiles = excludeFiles;
+            this.excludeFiles = excludeFiles.stream()
+                    .map(sourceDir::resolve)
+                    .toList();
+            Logging.finest(this.excludeFiles.stream().map(Path::toString).collect(Collectors.joining(", ", "Exclude files: [", "]")));
         }
 
         @Override
-        public @NotNull FileVisitResult preVisitDirectory(Path dir, @NotNull BasicFileAttributes attrs) throws IOException {
+        public @NotNull FileVisitResult preVisitDirectory(@NotNull Path dir, @NotNull BasicFileAttributes attrs) throws IOException {
             Path newDir = targetDir.resolve(sourceDir.relativize(dir));
             if (!Files.isDirectory(newDir)) {
-                Files.createDirectory(newDir);
+                Files.createDirectories(newDir);
             }
             return FileVisitResult.CONTINUE;
         }
 
         @Override
-        public @NotNull FileVisitResult visitFile(Path file, @NotNull BasicFileAttributes attrs) throws IOException {
+        public @NotNull FileVisitResult visitFile(@NotNull Path file, @NotNull BasicFileAttributes attrs) throws IOException {
             // Pass files that are set to ignore
-            if (excludeFiles.contains(file.getFileName().toString())) {
-                Logging.finest("Ignoring file: " + file.getFileName());
+            if (excludeFiles.contains(file)) {
+                Logging.finest("Ignoring file: " + file);
                 return FileVisitResult.CONTINUE;
             }
             // Copy the files

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

@@ -1,8 +1,8 @@
 package org.mvplugins.multiverse.core.utils;
 
 import io.vavr.control.Try;
-import org.checkerframework.checker.nullness.qual.Nullable;
 import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.utils.tick.TickDuration;
 
 import java.time.LocalTime;
 import java.time.format.DateTimeFormatter;
@@ -15,10 +15,6 @@ import java.time.format.DateTimeFormatter;
 @ApiStatus.AvailableSince("5.1")
 public final class MinecraftTimeFormatter {
 
-    private static final double TIME_MULTIPLIER = 3.6;
-    private static final long DAY_SECONDS = 24 * 60 * 60;
-    private static final long START_OFFSET = 6 * 60 * 60;
-
     /**
      * Formats Minecraft time to 12-hour format.
      *
@@ -48,19 +44,14 @@ public final class MinecraftTimeFormatter {
      * See <a href="https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html">DateTimeFormatter documentation</a>
      * for available patterns.
      *
-     * @param time   The Minecraft time to format.
-     * @param format The format string for the time.
+     * @param ticks     The Minecraft time to format.
+     * @param format    The format string for the time.
      *
      * @since 5.1
      */
     @ApiStatus.AvailableSince("5.1")
-    public static String formatTime(long time, String format) {
-        // Convert Minecraft time to real-world time
-        long realTime = (long) ((time * TIME_MULTIPLIER) + START_OFFSET) % DAY_SECONDS;  // Minecraft ticks to seconds
-
-        // Convert seconds to LocalTime
-        LocalTime localTime = LocalTime.ofSecondOfDay(realTime);
-
+    public static String formatTime(long ticks, String format) {
+        LocalTime localTime = TickDuration.ofTicks(ticks).toLocalTime();
         return Try.of(() -> DateTimeFormatter.ofPattern(format))
                 .map(localTime::format)
                 .getOrElse("invalid time format: " + format);

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

@@ -3,6 +3,8 @@ package org.mvplugins.multiverse.core.utils;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 
+import io.vavr.control.Try;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -15,8 +17,179 @@ public final class ReflectHelper {
      * Try to get the {@link Class} based on its classpath.
      *
      * @param classPath The target classpath.
-     * @return A {@link Class} if found, else null.
+     * @return A {@link Try} containing the {@link Class} if found, else a failure.
+     *
+     * @since 5.7
      */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    public static Try<Class<?>> tryGetClass(@NotNull String classPath) {
+        return Try.of(() -> Class.forName(classPath));
+    }
+
+    /**
+     * Check if the {@link Class} for a give classpath is present/valid.
+     *
+     * @param classPath Target classpath.
+     * @return True if class path is a valid class, else false.
+     */
+    public static boolean hasClass(String classPath) {
+        return tryGetClass(classPath).isSuccess();
+    }
+
+    /**
+     * Try to get a {@link Method} from a given class.
+     *
+     * @param clazz             The class to search the method on.
+     * @param methodName        Name of the method to get.
+     * @param parameterTypes    Parameters present for that method.
+     * @param <C>               The class type.
+     * @return A {@link Try} containing the {@link Method} if found, else a failure.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    public static <C> Try<Method> tryGetMethod(@NotNull Class<C> clazz, @NotNull String methodName, Class<?>... parameterTypes) {
+        return Try.of(() -> clazz.getMethod(methodName, parameterTypes))
+                .orElse(Try.of(() -> {
+                    Method method = clazz.getDeclaredMethod(methodName, parameterTypes);
+                    method.setAccessible(true);
+                    return method;
+                }));
+    }
+
+    /**
+     * Check if a {@link Method} exists on a given class.
+     *
+     * @param clazz             The class to search the method on.
+     * @param methodName        Name of the method to check.
+     * @param parameterTypes    Parameters present for that method.
+     * @return True if method exists, else false.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static boolean hasMethod(@NotNull Class<?> clazz, @NotNull String methodName, Class<?>... parameterTypes) {
+        return tryGetMethod(clazz, methodName, parameterTypes).isSuccess();
+    }
+
+    /**
+     * Try to invoke a {@link Method} on a class instance.
+     *
+     * @param classInstance Instance of the class responsible for the method.
+     * @param method        The method to invoke.
+     * @param parameters    Parameters needed when invoking the method.
+     * @param <C>           The class type.
+     * @param <R>           The return type of the method.
+     * @return A {@link Try} containing the return value of the method if found, else a failure.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    @SuppressWarnings("unchecked")
+    public static <C, R> Try<R> tryInvokeMethod(@NotNull C classInstance, @NotNull Method method, Object...parameters) {
+        return Try.of(() -> (R) method.invoke(classInstance, parameters));
+    }
+
+    /**
+     * Try to invoke a static {@link Method}.
+     *
+     * @param method        The static method to invoke.
+     * @param parameters    Parameters needed when invoking the method.
+     * @param <R>           The return type of the method.
+     * @return A {@link Try} containing the return value of the method if found, else a failure.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    @SuppressWarnings("unchecked")
+    public static <R> Try<R> tryInvokeStaticMethod(@NotNull Method method, Object...parameters) {
+        return Try.of(() -> (R) method.invoke(null, parameters));
+    }
+
+    /**
+     * Try to get a {@link Field} from a given class.
+     *
+     * @param clazz     The class to search the field on.
+     * @param fieldName Name of the field to get.
+     * @param <C>       The class type.
+     * @return A {@link Try} containing the {@link Field} if found, else a failure.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    public static <C> Try<Field> tryGetField(@NotNull Class<C> clazz, @NotNull String fieldName) {
+        return Try.of(() -> clazz.getField(fieldName))
+                .orElse(Try.of(() -> {
+                    Field field = clazz.getDeclaredField(fieldName);
+                    field.setAccessible(true);
+                    return field;
+                }));
+    }
+
+    /**
+     * Check if a {@link Field} exists on a given class.
+     *
+     * @param clazz     The class to search the field on.
+     * @param fieldName Name of the field to check.
+     * @return True if field exists, else false.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static boolean hasField(@NotNull Class<?> clazz, @NotNull String fieldName) {
+        return tryGetField(clazz, fieldName).isSuccess();
+    }
+
+    /**
+     * Try to get the value of a {@link Field} from an instance of the class responsible.
+     *
+     * @param classInstance Instance of the class to get the field value from.
+     * @param field         The field to get the value from.
+     * @param fieldType     Type of the field.
+     * @param <C>           The class type.
+     * @param <V>           The field value type.
+     * @return A {@link Try} containing the field value if found, else a failure.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    public static <C, V> Try<V> tryGetFieldValue(@NotNull C classInstance, @NotNull Field field, @NotNull Class<V> fieldType) {
+        return Try.of(() -> fieldType.cast(field.get(classInstance)));
+    }
+
+    /**
+     * Try to get the value of a static {@link Field}.
+     *
+     * @param field     The static field to get the value from.
+     * @param fieldType Type of the field.
+     * @param <V>       The field value type.
+     * @return A {@link Try} containing the field value if found, else a failure.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    public static <V> Try<V> tryGetStaticFieldValue(@NotNull Field field, @NotNull Class<V> fieldType) {
+        return Try.of(() -> fieldType.cast(field.get(null)));
+    }
+
+    /**
+     * Try to get the {@link Class} based on its classpath.
+     *
+     * @param classPath The target classpath.
+     * @return A {@link Class} if found, else null.
+     *
+     * @deprecated Use {@link #tryGetClass(String)} instead, which returns a {@link Try} that can be used to handle
+     * the failure case more explicitly.
+     */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable
     public static Class<?> getClass(String classPath) {
         try {
@@ -26,16 +199,6 @@ public final class ReflectHelper {
         }
     }
 
-    /**
-     * Check if the {@link Class} for a give classpath is present/valid.
-     *
-     * @param classPath Target classpath.
-     * @return True if class path is a valid class, else false.
-     */
-    public static boolean hasClass(String classPath) {
-        return getClass(classPath) != null;
-    }
-
     /**
      * Try to get a {@link Method} from a given class.
      *
@@ -44,7 +207,12 @@ public final class ReflectHelper {
      * @param parameterTypes    Parameters present for that method.
      * @param <C>               The class type.
      * @return A {@link Method} if found, else null.
+     *
+     * @deprecated Use {@link #tryGetMethod(Class, String, Class[])} instead, which returns a {@link Try} that can be
+     * used to handle the failure case more explicitly.
      */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable
     public static <C> Method getMethod(Class<C> clazz, String methodName, Class<?>... parameterTypes) {
         try {
@@ -64,7 +232,12 @@ public final class ReflectHelper {
      * @param parameterTypes    Parameters present for that method.
      * @param <C>               The class type.
      * @return A {@link Method} if found, else null.
+     *
+     * @deprecated Use {@link #tryGetMethod(Class, String, Class[])} instead, which returns a {@link Try} that can be
+     * used to handle the failure case more explicitly.
      */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable
     public static <C> Method getMethod(C classInstance, String methodName, Class<?>... parameterTypes) {
         return getMethod(classInstance.getClass(), methodName, parameterTypes);
@@ -79,8 +252,14 @@ public final class ReflectHelper {
      * @param <C>           The class type.
      * @param <R>           The return type.
      * @return Return value of the method call if any, else null.
+     *
+     * @deprecated Use {@link #tryInvokeMethod(Object, Method, Object...)} instead, which returns a {@link Try} that can
+     * be used to handle the failure case more explicitly.
      */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable
+    @SuppressWarnings("unchecked")
     public static <C, R> R invokeMethod(C classInstance, Method method, Object...parameters) {
         try {
             return (R) method.invoke(classInstance, parameters);
@@ -96,7 +275,12 @@ public final class ReflectHelper {
      * @param fieldName Name of the field to get.
      * @param <C>       The class type.
      * @return A {@link Field} if found, else null.
+     *
+     * @deprecated Use {@link #tryGetField(Class, String)} instead, which returns a {@link Try} that can be used to
+     * handle the failure case more explicitly.
      */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable
     public static <C> Field getField(Class<C> clazz, String fieldName) {
         try {
@@ -115,7 +299,12 @@ public final class ReflectHelper {
      * @param fieldName     Name of the field to get.
      * @param <C>           The class type.
      * @return A {@link Field} if found, else null.
+     *
+     * @deprecated Use {@link #tryGetField(Class, String)} instead, which returns a {@link Try} that can be used to
+     * handle the failure case more explicitly.
      */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable
     public static <C> Field getField(C classInstance, String fieldName) {
         return getField(classInstance.getClass(), fieldName);
@@ -130,7 +319,12 @@ public final class ReflectHelper {
      * @param <C>           The class type.
      * @param <V>           The field value type.
      * @return The field value if any, else null.
+     *
+     * @deprecated Use {@link #tryGetFieldValue(Object, Field, Class)} instead, which returns a {@link Try} that can be
+     * used to handle the failure case more explicitly.
      */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable
     public static <C, V> V getFieldValue(C classInstance, @Nullable Field field, @NotNull Class<V> fieldType) {
         try {
@@ -153,7 +347,12 @@ public final class ReflectHelper {
      * @param <C>           The class type.
      * @param <V>           The field value type.
      * @return The field value if any, else null.
+     *
+     * @deprecated Use {@link #tryGetField(Class, String)} then map to {@link #tryGetFieldValue(Object, Field, Class)} instead,
+     * which returns a {@link Try} that can be used to handle the failure case more explicitly.
      */
+    @Deprecated(forRemoval = true, since = "5.7")
+    @ApiStatus.ScheduledForRemoval(inVersion = "6.0")
     @Nullable
     public static <C, V> V getFieldValue(C classInstance, @Nullable String fieldName, @NotNull Class<V> fieldType) {
         return getFieldValue(classInstance, getField(classInstance, fieldName), fieldType);

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

@@ -3,6 +3,7 @@ package org.mvplugins.multiverse.core.utils;
 import com.dumptruckman.minecraft.util.Logging;
 import io.vavr.control.Option;
 import jakarta.inject.Inject;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jvnet.hk2.annotations.Service;
 
@@ -14,6 +15,21 @@ import java.util.Map;
 @Service
 public final class ServerProperties {
 
+    private static ServerProperties instance;
+
+    /**
+     * A very bad static way of obtaining the level name from server.properties of older mc versions that
+     * don't have any way of getting main level name.
+     * <br />
+     * For internal use ONLY!
+     *
+     * @return The level name if it can be obtained, else none.
+     */
+    @ApiStatus.Internal
+    public static Option<String> getStaticLevelName() {
+        return Option.of(instance).flatMap(ServerProperties::getLevelName);
+    }
+
     private final Map<String, String> properties;
     private final FileUtils fileUtils;
 
@@ -22,6 +38,8 @@ public final class ServerProperties {
         this.fileUtils = fileUtils;
         properties = new HashMap<>();
         parseServerPropertiesFile();
+
+        instance = this;
     }
 
     private void parseServerPropertiesFile() {

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

@@ -118,6 +118,20 @@ public final class StringFormatter {
      * @return The parsed args
      */
     public static @NotNull Collection<String> parseQuotesInArgs(@NotNull String[] args) {
+        return parseQuotesInArgs(args, " ");
+    }
+
+    /**
+     * Parse quotes in args into a single string. E.g. ["\"my", "string\""] -> ["my string"]
+     *
+     * @param args      The args to parse
+     * @param separator The separator to use between args when joining them
+     * @return The parsed args
+     *
+     * @since 5.8
+     */
+    @ApiStatus.AvailableSince("5.8")
+    public static @NotNull Collection<String> parseQuotesInArgs(@NotNull String[] args, @NotNull String separator) {
         List<String> result = new ArrayList<>(args.length);
         StringBuilder current = new StringBuilder();
         boolean inQuotes = false;
@@ -131,13 +145,13 @@ public final class StringFormatter {
                 quoteStartIndex = i;
                 current.append(arg.substring(1));
             } else if (inQuotes && arg.endsWith("\"")) {
-                current.append(" ").append(arg, 0, arg.length() - 1);
+                current.append(separator).append(arg, 0, arg.length() - 1);
                 result.add(current.toString());
                 current.setLength(0);
                 inQuotes = false;
                 quoteStartIndex = -1;
             } else if (inQuotes) {
-                current.append(" ").append(arg);
+                current.append(separator).append(arg);
             } else if (arg.startsWith("\"") && arg.endsWith("\"") && arg.length() > 1) {
                 // Fully quoted in one token
                 result.add(arg.substring(1, arg.length() - 1));

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

@@ -1,7 +1,7 @@
 package org.mvplugins.multiverse.core.utils;
 
 import com.dumptruckman.minecraft.util.Logging;
-import io.vavr.control.Try;
+import io.vavr.control.Option;
 import jakarta.inject.Inject;
 import org.bukkit.Server;
 import org.bukkit.scheduler.BukkitRunnable;
@@ -10,8 +10,6 @@ import org.jvnet.hk2.annotations.Service;
 import org.mvplugins.multiverse.core.MultiverseCore;
 
 import java.lang.reflect.Field;
-import java.lang.reflect.Method;
-import java.util.Objects;
 
 /**
  * Defers action that cannot be done during world tick.
@@ -21,26 +19,22 @@ public final class WorldTickDeferrer {
 
     private final MultiverseCore plugin;
 
-    private Object console = null;
-    private Field isIteratingOverLevelsMethod = null;
+    private final Option<Object> console;
+    private final Option<Field> isIteratingOverLevelsMethod;
 
     @Inject
     WorldTickDeferrer(@NotNull MultiverseCore plugin, @NotNull Server server) {
         this.plugin = plugin;
-        Method getServerMethod = ReflectHelper.getMethod(server.getClass(), "getServer");
-        if (getServerMethod == null) {
-            Logging.fine("Unable to find getServer method.");
-            return;
-        }
-        this.console = ReflectHelper.invokeMethod(server, getServerMethod);
-        if (console == null) {
-            Logging.fine("Unable to find console.");
-            return;
-        }
-        this.isIteratingOverLevelsMethod = Try.of(() -> console.getClass().getField("isIteratingOverLevels")).getOrNull();
-        if (isIteratingOverLevelsMethod == null) {
-            Logging.fine("Unable to find isIteratingOverLevels field.");
-        }
+        this.console = ReflectHelper.tryGetMethod(server.getClass(), "getServer")
+                .onFailure(throwable -> Logging.fine("Unable to find getServer method."))
+                .flatMap(getServerMethod -> ReflectHelper.tryInvokeMethod(server, getServerMethod))
+                .onFailure(throwable -> Logging.fine("Unable to find console."))
+                .toOption();
+        this.isIteratingOverLevelsMethod = console.toTry()
+                .map(Object::getClass)
+                .flatMap(consoleClazz -> ReflectHelper.tryGetField(consoleClazz, "isIteratingOverLevels"))
+                .onFailure(throwable -> Logging.fine("Unable to find isIteratingOverLevels field."))
+                .toOption();
     }
 
     /**
@@ -63,16 +57,14 @@ public final class WorldTickDeferrer {
     }
 
     /**
-     * Check if the the server is currently doing a world tick.
+     * Check if the server is currently doing a world tick.
      *
      * @return True if the server is currently doing a world tick
      */
     private boolean isIteratingOverLevels() {
-        if (console == null || isIteratingOverLevelsMethod == null) {
-            return false;
-        }
-        return Objects.requireNonNullElse(
-                ReflectHelper.getFieldValue(console, isIteratingOverLevelsMethod, Boolean.class),
-                false);
+        return isIteratingOverLevelsMethod
+                .flatMap(field -> console
+                        .flatMap(c -> ReflectHelper.tryGetFieldValue(c, field, Boolean.class).toOption()))
+                .getOrElse(false);
     }
 }

src/main/java/org/mvplugins/multiverse/core/utils/compatibility/BukkitCompatibility.java

@@ -0,0 +1,123 @@
+package org.mvplugins.multiverse.core.utils.compatibility;
+
+import io.vavr.control.Option;
+import io.vavr.control.Try;
+import org.bukkit.Bukkit;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Server;
+import org.bukkit.World;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.mvplugins.multiverse.core.utils.ReflectHelper;
+import org.mvplugins.multiverse.core.world.key.WorldKeyOrName;
+
+import java.lang.reflect.Method;
+import java.nio.file.Path;
+
+/**
+ * Compatibility class used to handle API changes in {@link Bukkit} class.
+ *
+ * @since 5.6
+ */
+@ApiStatus.AvailableSince("5.6")
+public final class BukkitCompatibility {
+
+    private static final Try<Method> GET_LEVEL_DIRECTORY_METHOD;
+    private static final Try<Method> GET_WORLD_NAMESPACED_KEY_METHOD;
+
+    static {
+        GET_LEVEL_DIRECTORY_METHOD = ReflectHelper.tryGetMethod(Server.class, "getLevelDirectory");
+        GET_WORLD_NAMESPACED_KEY_METHOD = ReflectHelper.tryGetMethod(Bukkit.class, "getWorld", NamespacedKey.class);
+    }
+
+    /**
+     * Check whether the server is using the new dimension storage system introduced in PaperMC 26.1.
+     * <br />
+     * This is based of whether getLevelDirectory method exists in the server class,which is the main API change for
+     * the new dimension storage system.
+     *
+     * @return True if the server is using the new dimension storage system, else false.
+     *
+     * @since 5.6
+     */
+    @ApiStatus.AvailableSince("5.6")
+    public static boolean isUsingNewDimensionStorage() {
+        return GET_LEVEL_DIRECTORY_METHOD
+                .flatMap(method -> ReflectHelper.tryInvokeMethod(Bukkit.getServer(), method))
+                .isSuccess();
+    }
+
+    /**
+     * Gets the folder where all the worlds will be store. Before 26.1, all worlds are stored in the root directory
+     * of the server, which can be obtained by {@link Server#getWorldContainer()}.
+     * <br />
+     * After 26.1, PaperMC changed all worlds are stored in the "[level]/dimensions" folder under the world
+     * level directory, which needs to be manually parsed.
+     *
+     * @return The location where all the worlds folders should be, depending on server's mc version.
+     *
+     * @since 5.6
+     */
+    @ApiStatus.AvailableSince("5.6")
+    @NotNull
+    public static Path getWorldFoldersDirectory() {
+        Server server = Bukkit.getServer();
+        return GET_LEVEL_DIRECTORY_METHOD.flatMap(method -> ReflectHelper.tryInvokeMethod(server, method))
+                .filter(Path.class::isInstance)
+                .map(Path.class::cast)
+                .map(path -> path.resolve("dimensions"))
+                .getOrElse(() -> server.getWorldContainer().toPath());
+    }
+
+    /**
+     * Check if the world with the given name or namespaced key (e.g. minecraft:overworld) exists,
+     * and return it if it does.
+     * <br />
+     * Note that some default world names have different namespaced key matched with them.
+     * E.g.: world -> minecraft:overworld, world_nether -> minecraft:the_nether, world_the_end -> minecraft:the_end.
+     *
+     * @param nameOrKey Either a name or namespaced key string representation.
+     * @return The world if it exists
+     *
+     * @since 5.6
+     */
+    @ApiStatus.AvailableSince("5.6")
+    @NotNull
+    public static Option<World> getWorldByNameOrKey(@NotNull String nameOrKey) {
+        return Option.of(Bukkit.getWorld(nameOrKey))
+                .orElse(() -> GET_WORLD_NAMESPACED_KEY_METHOD
+                        .flatMap(method -> ReflectHelper.tryInvokeStaticMethod(method, NamespacedKey.fromString(nameOrKey)))
+                        .filter(World.class::isInstance)
+                        .map(World.class::cast)
+                        .toOption());
+    }
+
+
+    /**
+     * Check if the world represented by the given {@link WorldKeyOrName} exists and return it if present.
+     *
+     * <p>This first attempts to resolve the world by name using {@link WorldKeyOrName#usableName()} (which
+     * delegates to the traditional Bukkit world name lookup). If that fails it will attempt to resolve a
+     * {@link NamespacedKey} using {@link WorldKeyOrName#usableKey()} (which mirrors the newer Bukkit API
+     * that accepts namespaced keys, e.g. "minecraft:overworld").
+     *
+     * @param keyOrName The key-or-name wrapper providing either a world name or a {@link NamespacedKey}.
+     * @return The world if it exists.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    public static Option<World> getWorldByNameOrKey(@NotNull WorldKeyOrName keyOrName) {
+        return Option.of(Bukkit.getWorld(keyOrName.usableName()))
+                .orElse(() -> GET_WORLD_NAMESPACED_KEY_METHOD
+                        .flatMap(method -> ReflectHelper.tryInvokeStaticMethod(method, keyOrName.usableKey()))
+                        .filter(World.class::isInstance)
+                        .map(World.class::cast)
+                        .toOption());
+    }
+
+    private BukkitCompatibility() {
+        throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/compatibility/EntityCompatibility.java

@@ -0,0 +1,40 @@
+package org.mvplugins.multiverse.core.utils.compatibility;
+
+import org.bukkit.entity.Entity;
+import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.mvplugins.multiverse.core.utils.ReflectHelper;
+
+/**
+ * Compatibility class used to handle API changes in {@link Entity} class.
+ */
+// TODO: Consider making this part of the public API in v5.9.
+@ApiStatus.Internal
+public final class EntityCompatibility {
+
+    private static final boolean HAS_GET_ENTITY_SPAWN_REASON_METHOD;
+
+    static {
+        HAS_GET_ENTITY_SPAWN_REASON_METHOD = ReflectHelper.hasMethod(Entity.class, "getEntitySpawnReason");
+    }
+
+    /**
+     * Gets the reason that initially spawned the entity when supported by the server.
+     *
+     * @param entity The entity to query.
+     * @return The entity's spawn reason, or null when the API is unavailable.
+     */
+    @Nullable
+    public static SpawnReason getEntitySpawnReason(@NotNull Entity entity) {
+        if (HAS_GET_ENTITY_SPAWN_REASON_METHOD) {
+            return entity.getEntitySpawnReason();
+        }
+        return null;
+    }
+
+    private EntityCompatibility() {
+        throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/compatibility/UnsafeValuesCompatibility.java

@@ -0,0 +1,45 @@
+package org.mvplugins.multiverse.core.utils.compatibility;
+
+import io.vavr.control.Option;
+import io.vavr.control.Try;
+import org.bukkit.Bukkit;
+import org.bukkit.UnsafeValues;
+import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.utils.ReflectHelper;
+
+import java.lang.reflect.Method;
+
+/**
+ * Compatibility class used to handle API changes in {@link UnsafeValues} class.
+ *
+ * @since 5.6
+ */
+@ApiStatus.AvailableSince("5.7")
+public final class UnsafeValuesCompatibility {
+
+    private static final Try<Method> GET_MAIN_LEVEL_NAME_METHOD;
+
+    static {
+        GET_MAIN_LEVEL_NAME_METHOD = ReflectHelper.tryGetMethod(UnsafeValues.class, "getMainLevelName");
+    }
+
+    /**
+     * Try to call the getMainLevelName method in UnsafeValues, which is used to get level-name configured in
+     * server.properties file.
+     *
+     * @return The level-name configured in server.properties file, or empty if the method is not available.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static Option<String> getMainLevelName() {
+        return GET_MAIN_LEVEL_NAME_METHOD
+                .flatMap(method -> ReflectHelper.tryInvokeMethod(Bukkit.getUnsafe(), method))
+                .map(String.class::cast)
+                .toOption();
+    }
+
+    private UnsafeValuesCompatibility() {
+        throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/compatibility/WorldBorderCompatibility.java

@@ -0,0 +1,170 @@
+package org.mvplugins.multiverse.core.utils.compatibility;
+
+import org.bukkit.WorldBorder;
+import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.utils.ReflectHelper;
+import org.mvplugins.multiverse.core.utils.tick.TickDuration;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Compatibility class used to handle API changes in {@link WorldBorder} class.
+ *
+ * @since 5.7
+ */
+@ApiStatus.AvailableSince("5.7")
+@SuppressWarnings("removal")
+public final class WorldBorderCompatibility {
+
+    private static final boolean HAS_GET_WARNING_TIME_TICKS_METHOD;
+    private static final boolean HAS_SET_WARNING_TIME_TICKS_METHOD;
+    private static final boolean HAS_SET_WARNING_TIME_METHOD;
+    private static final boolean HAS_GET_WARNING_TIME_METHOD;
+
+    private static final boolean HAS_CHANGE_SIZE_METHOD;
+    private static final boolean HAS_SET_SIZE_METHOD;
+
+    static {
+        HAS_GET_WARNING_TIME_TICKS_METHOD = ReflectHelper.hasMethod(WorldBorder.class, "getWarningTimeTicks");
+        HAS_SET_WARNING_TIME_TICKS_METHOD = ReflectHelper.hasMethod(WorldBorder.class, "setWarningTimeTicks", int.class);
+        HAS_GET_WARNING_TIME_METHOD = ReflectHelper.hasMethod(WorldBorder.class, "getWarningTime");
+        HAS_SET_WARNING_TIME_METHOD = ReflectHelper.hasMethod(WorldBorder.class, "setWarningTime", int.class);
+
+        HAS_CHANGE_SIZE_METHOD = ReflectHelper.hasMethod(WorldBorder.class, "changeSize", double.class, long.class);
+        HAS_SET_SIZE_METHOD = ReflectHelper.hasMethod(WorldBorder.class, "setSize", double.class, long.class);
+    }
+
+    /**
+     * Gets the world border warning time in ticks, using the most precise API available.
+     * <br />
+     * If the server exposes {@code getWarningTimeTicks()}, that value is returned directly. Otherwise, the older
+     * {@code getWarningTime()} API is used and converted from seconds to ticks.
+     *
+     * @param worldBorder The world border to query.
+     * @return The warning time in ticks.
+     *
+     * @since 5.7
+     * @throws IllegalStateException If neither warning-time getter is available.
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static int getWarningTimeTicks(WorldBorder worldBorder) {
+        if (HAS_GET_WARNING_TIME_TICKS_METHOD) {
+            return worldBorder.getWarningTimeTicks();
+        } else if (HAS_GET_WARNING_TIME_METHOD) {
+            return worldBorder.getWarningTime() * 20;
+        }
+        throw new IllegalStateException("Neither getWarningTimeTicks nor getWarningTime method is available in WorldBorder class.");
+    }
+
+    /**
+     * Gets the world border warning time in seconds, using the most appropriate API available.
+     * <br />
+     * If the server exposes {@code getWarningTimeTicks()}, that value is converted from ticks to seconds. Otherwise,
+     * the older {@code getWarningTime()} API is used directly.
+     *
+     * @param worldBorder The world border to query.
+     * @return The warning time in seconds.
+     *
+     * @since 5.7
+     * @throws IllegalStateException If neither warning-time getter is available.
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static double getWarningTime(WorldBorder worldBorder) {
+        if (HAS_GET_WARNING_TIME_TICKS_METHOD) {
+            return (double) worldBorder.getWarningTimeTicks() / 20.0;
+        } else if (HAS_GET_WARNING_TIME_METHOD) {
+            return worldBorder.getWarningTime();
+        }
+        throw new IllegalStateException("Neither getWarningTimeTicks nor getWarningTime method is available in WorldBorder class.");
+    }
+
+    /**
+     * Checks whether the current server supports setting the world border warning time in ticks.
+     *
+     * @return True if {@code setWarningTimeTicks(int)} is available, else false.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static boolean supportsSetWarningTimeInTicks() {
+        return HAS_SET_WARNING_TIME_TICKS_METHOD;
+    }
+
+    /**
+     * Sets the world border warning time in ticks.
+     * <br />
+     * This is a convenience wrapper around {@link #setWarningTimeDuration(WorldBorder, TickDuration)} that converts
+     * the given tick value into a {@link TickDuration} first.
+     *
+     * @param worldBorder   The world border to update.
+     * @param ticks         The warning time in ticks.
+     *
+     * @since 5.7
+     */
+    public static void setWarningTimeTicks(WorldBorder worldBorder, int ticks) {
+        setWarningTimeDuration(worldBorder, TickDuration.ofTicks(ticks));
+    }
+
+    /**
+     * Sets the world border warning time, preferring tick-based APIs when available.
+     * <br />
+     * If the server supports {@code setWarningTimeTicks(int)}, the provided duration is applied in ticks. Otherwise,
+     * the older {@code setWarningTime(int)} API is used and the duration is converted to seconds.
+     *
+     * @param worldBorder   The world border to update.
+     * @param duration      The warning duration to apply.
+     *
+     * @since 5.7
+     * @throws IllegalStateException If neither warning-time setter is available.
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static void setWarningTimeDuration(WorldBorder worldBorder, TickDuration duration) {
+        if (HAS_SET_WARNING_TIME_TICKS_METHOD) {
+            worldBorder.setWarningTimeTicks((int) duration.toTicks());
+        } else if (HAS_SET_WARNING_TIME_METHOD) {
+            worldBorder.setWarningTime((int) Math.round(duration.to(TimeUnit.SECONDS)));
+        } else {
+            throw new IllegalStateException("Neither setWarningTimeTicks nor setWarningTime method is available in WorldBorder class.");
+        }
+    }
+
+    /**
+     * Checks whether the current server supports changing world border size over a duration in ticks.
+     *
+     * @return True if {@code changeSize(double, long)} is available, else false.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static boolean supportsChangeSizeInTicks() {
+        return HAS_CHANGE_SIZE_METHOD;
+    }
+
+    /**
+     * Changes the world border size, preferring the tick-based API when available.
+     * <br />
+     * If the server supports {@code changeSize(double, long)}, the size change is applied in ticks. Otherwise, the
+     * older {@code setSize(double, long)} API is used and the duration is converted to seconds.
+     *
+     * @param worldBorder   The world border to update.
+     * @param newSize       The new border size.
+     * @param duration      The transition duration to apply.
+     *
+     * @since 5.7
+     * @throws IllegalStateException If neither size-changing API is available.
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static void changeSizeDuration(WorldBorder worldBorder, double newSize, TickDuration duration) {
+        if (HAS_CHANGE_SIZE_METHOD) {
+            worldBorder.changeSize(newSize, duration.toTicks());
+        } else if (HAS_SET_SIZE_METHOD) {
+            worldBorder.setSize(newSize, Math.round(duration.to(TimeUnit.SECONDS)));
+        } else {
+            throw new IllegalStateException("Neither changeSize nor setSize method is available in WorldBorder class.");
+        }
+    }
+
+    private WorldBorderCompatibility() {
+        throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/compatibility/WorldCompatibility.java

@@ -0,0 +1,92 @@
+package org.mvplugins.multiverse.core.utils.compatibility;
+
+import io.papermc.lib.PaperLib;
+import io.vavr.control.Try;
+import org.bukkit.World;
+import org.jetbrains.annotations.ApiStatus;
+import org.mvplugins.multiverse.core.utils.ReflectHelper;
+
+import java.lang.reflect.Method;
+
+/**
+ * Compatibility class used to handle API changes in {@link World} class.
+ *
+ * @since 5.7
+ */
+@ApiStatus.AvailableSince("5.7")
+public final class WorldCompatibility {
+
+    private static final Try<Method> SAVE_WITH_FLUSH_METHOD;
+    private static final boolean HAS_GET_COORDINATE_SCALE_METHOD;
+    private static final boolean HAS_HAS_BONUS_CHEST_METHOD;
+
+    static {
+        SAVE_WITH_FLUSH_METHOD = ReflectHelper.tryGetMethod(World.class, "save", boolean.class);
+        HAS_GET_COORDINATE_SCALE_METHOD = ReflectHelper.hasMethod(World.class, "getCoordinateScale");
+        HAS_HAS_BONUS_CHEST_METHOD = ReflectHelper.hasMethod(World.class, "hasBonusChest");
+    }
+
+    /**
+     * Saves the world, with an option to wait for chunk writers to finish if the method is available. Saving with
+     * flush is only supported on PaperMC 1.21+.
+     * <br />
+     * If the method is not available, it will fall back to the normal save method, which may not wait for chunk writers
+     * to finish, but is the best we can do for older versions of Minecraft.
+     *
+     * @param world The world to save
+     * @param flush Waits for chunk writers to finish
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static void saveWithFlush(World world, boolean flush) {
+        SAVE_WITH_FLUSH_METHOD
+                .flatMap(method -> ReflectHelper.tryInvokeMethod(world, method, flush))
+                .orElseRun(ignore -> world.save());
+    }
+
+    /**
+     * Gets the coordinate scale for the world, which is used to convert between overworld and nether coordinates.
+     * On PaperMC, this can be obtained directly from the API. On older versions, it is manually determined based on the
+     * world environment (overworld = 1, nether = 8, end = 1).
+     *
+     * @param world The world to get the coordinate scale for
+     * @return The scale
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static double getCoordinateScale(World world) {
+        if (HAS_GET_COORDINATE_SCALE_METHOD) {
+            return world.getCoordinateScale();
+        }
+        return switch (world.getEnvironment()) {
+            case NORMAL -> 1;
+            case NETHER -> 8;
+            default -> 1;
+        };
+    }
+
+    /**
+     * Checks if the world has a bonus chest.
+     * <br />
+     * On PaperMC 1.21.5+, this can be obtained directly from the API. On older versions, it always returns false as
+     * bonus chest is not supported.
+     *
+     * @param world The world to check
+     * @return True if the world has a bonus chest, false otherwise
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static boolean hasBonusChest(World world) {
+        if (HAS_HAS_BONUS_CHEST_METHOD) {
+            return world.hasBonusChest();
+        }
+        return false;
+    }
+
+    private WorldCompatibility() {
+        throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/compatibility/WorldCreatorCompatibility.java

@@ -0,0 +1,188 @@
+package org.mvplugins.multiverse.core.utils.compatibility;
+
+import com.dumptruckman.minecraft.util.Logging;
+import io.vavr.control.Try;
+import org.bukkit.NamespacedKey;
+import org.bukkit.WorldCreator;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.mvplugins.multiverse.core.utils.ReflectHelper;
+import org.mvplugins.multiverse.core.utils.position.EntityPosition;
+import org.mvplugins.multiverse.core.world.key.WorldKeyOrName;
+
+import java.lang.reflect.Method;
+import java.util.Locale;
+
+/**
+ * Compatibility class used to handle {@link WorldCreator} API changes across different server versions.
+ *
+ * @since 5.7
+ */
+@ApiStatus.AvailableSince("5.7")
+public final class WorldCreatorCompatibility {
+
+    private static final Try<Class<?>> POSITION_CLASS;
+    private static final Try<Method> FORCED_SPAWN_POSITION_METHOD;
+    private static final Try<Method> OF_KEY_METHOD;
+    private static final Try<Method> OF_NAME_AND_KEY_METHOD;
+    private static final Try<Method> BONUS_CHEST_METHOD;
+
+    static {
+        POSITION_CLASS = ReflectHelper.tryGetClass("io.papermc.paper.math.Position");
+        FORCED_SPAWN_POSITION_METHOD = POSITION_CLASS.flatMap(positionClass ->
+                ReflectHelper.tryGetMethod(WorldCreator.class, "forcedSpawnPosition", positionClass, float.class, float.class));
+        BONUS_CHEST_METHOD = ReflectHelper.tryGetMethod(WorldCreator.class, "bonusChest", boolean.class);
+        OF_KEY_METHOD = ReflectHelper.tryGetMethod(WorldCreator.class, "ofKey", NamespacedKey.class);
+        OF_NAME_AND_KEY_METHOD = ReflectHelper.tryGetMethod(WorldCreator.class, "ofNameAndKey", String.class, NamespacedKey.class);
+    }
+
+    /**
+     * Check whether the current server version supports creating worlds with a {@link NamespacedKey}.
+     * <br />
+     * This is based on whether the {@code ofKey(NamespacedKey)} method exists in the {@link WorldCreator} class,
+     * which was introduced in later server versions.
+     *
+     * @return True if the server supports world creation with NamespacedKey, else false.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static boolean canCreateWorldWithKey() {
+        return OF_KEY_METHOD.isSuccess();
+    }
+
+    /**
+     * Creates a {@link WorldCreator} from a {@link WorldKeyOrName}, using the most appropriate method
+     * based on the server version and the key/name state.
+     * <br />
+     * If the server supports NamespacedKey-based creation and the provided keyOrName is a key,
+     * this method will use {@code ofKey()}. Otherwise, it falls back to {@code name()}.
+     *
+     * @param keyOrName Either a world key or name to create from.
+     * @return The {@link WorldCreator} initialized for the given key or name.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static WorldCreator ofKeyOrName(@NotNull WorldKeyOrName keyOrName) {
+        return ofNameAndKey(keyOrName.usableKey(), keyOrName.usableName());
+    }
+
+    /**
+     * Creates a {@link WorldCreator} from a {@link NamespacedKey} and world name, using the most
+     * appropriate method based on the server version and dimension storage configuration.
+     * <br />
+     * This method attempts to use the most feature-rich creation method available:
+     * if {@code ofNameAndKey()} is available and the parameters are compatible, use it;
+     * otherwise, if {@code ofKey()} is available, use it; as a fallback, use {@code name()}.
+     *
+     * @param worldKey The namespaced key for the world.
+     * @param worldName The display name for the world.
+     * @return The {@link WorldCreator} initialized with the given key and name.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static WorldCreator ofNameAndKey(@NotNull NamespacedKey worldKey, String worldName) {
+        if (OF_NAME_AND_KEY_METHOD.isSuccess() && canPassIntoNameAndKey(worldKey)) {
+            return WorldCreator.ofNameAndKey(worldName, worldKey);
+        }
+        if  (OF_KEY_METHOD.isSuccess()) {
+            return WorldCreator.ofKey(worldKey);
+        }
+        return WorldCreator.name(worldName);
+    }
+
+    /**
+     * Check if the given world key and name can be passed into the {@code ofNameAndKey()} method.
+     * <br />
+     * The parameters are compatible only if the server is not using new dimension storage,
+     * or if the namespace is the Minecraft namespace and the world name (lowercased) matches the key.
+     *
+     * @param worldKey The namespaced key for the world.
+     * @return True if the parameters can be safely passed to {@code ofNameAndKey()}, else false.
+     */
+    private static boolean canPassIntoNameAndKey(@NotNull NamespacedKey worldKey) {
+        return !BukkitCompatibility.isUsingNewDimensionStorage()
+                || worldKey.getNamespace().equals(NamespacedKey.MINECRAFT);
+    }
+
+    /**
+     * Checks if the server supports configuring a forced spawn position via the WorldCreator API.
+     * <br />
+     * The force spawn position API is generally only available on PaperMC 26.1+
+     *
+     * @return Whether force spawn position API is supported on the current server version.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static boolean supportsForcedSpawnPosition() {
+        return FORCED_SPAWN_POSITION_METHOD.isSuccess();
+    }
+
+    /**
+     * Tries to set the forced spawn position if the server implements the API. This call will do nothing if server
+     * software does not implement the required APIs.
+     *
+     * @param worldCreator  Target creator instance to set on.
+     * @param position      The position to set as the forced spawn point for the world.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static void setForcedSpawnPosition(WorldCreator worldCreator, EntityPosition position) {
+        if (!supportsForcedSpawnPosition()) {
+            Logging.fine("Server does not support forced spawn position configuration via WorldCreator API.");
+            return;
+        }
+        ReflectHelper.tryInvokeMethod(
+                worldCreator,
+                FORCED_SPAWN_POSITION_METHOD.get(),
+                io.papermc.paper.math.Position.fine(
+                        position.getVector().getX().getRawValue(),
+                        position.getVector().getY().getRawValue(),
+                        position.getVector().getZ().getRawValue()
+                ),
+                (float) position.getDirection().getYaw().getRawValue(),
+                (float) position.getDirection().getPitch().getRawValue()
+        ).onFailure(ex ->
+                Logging.warning("Failed to set forced spawn position on WorldCreator: %s", ex.getMessage()));
+    }
+
+    /**
+     * Checks if the server supports configuring bonus chest generation via the WorldCreator API.
+     * <br />
+     * The bonus chest API is generally only available on PaperMC 1.21.5+
+     *
+     * @return Whether bonus chest API is supported on the current server version.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static boolean supportsBonusChest() {
+        return BONUS_CHEST_METHOD.isSuccess();
+    }
+
+    /**
+     * Tries to set bonus chest if the server implements the API. This call will do nothing if server software does not
+     * implement the required APIs.
+     *
+     * @param worldCreator          Target creator instance to set on.
+     * @param generateBonusChest    Whether to generate a bonus chest at the world spawn point.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static void setBonusChest(WorldCreator worldCreator, boolean generateBonusChest) {
+        if (!supportsBonusChest()) {
+            Logging.fine("Server does not support bonus chest generation via WorldCreator API.");
+            return;
+        }
+        worldCreator.bonusChest(generateBonusChest);
+    }
+
+    private WorldCreatorCompatibility() {
+        throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/compatibility/package-info.java

@@ -0,0 +1,5 @@
+/**
+ * Contains classes to handle compatibility due to differing API methods across different server versions and the
+ * API gaps between PaperMC and Spigot.
+ */
+package org.mvplugins.multiverse.core.utils.compatibility;

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

@@ -2,6 +2,7 @@ package org.mvplugins.multiverse.core.utils.result;
 
 import java.util.function.Consumer;
 import java.util.function.Function;
+import java.util.function.Predicate;
 import java.util.function.Supplier;
 
 import io.vavr.control.Either;
@@ -19,6 +20,38 @@ import org.mvplugins.multiverse.core.locale.message.MessageReplacement;
  */
 public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Success, Attempt.Failure {
 
+    /**
+     * Creates a new success attempt.
+     *
+     * @param value The value.
+     * @param <T>   The type of the value.
+     * @param <F>   The type of failure reason.
+     * @return The new success attempt.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    static <T, F extends FailureReason> Attempt.Success<T, F> successRef(T value) {
+        return new Success<>(value);
+    }
+
+    /**
+     * Creates a new failure attempt.
+     *
+     * @param failureReason         The reason for failure.
+     * @param messageReplacements   The replacements for the failure message.
+     * @param <T>                   The type of the value.
+     * @param <F>                   The type of failure reason.
+     * @return The new failure attempt.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    static <T, F extends FailureReason> Attempt.Failure<T, F> failureRef(
+            F failureReason, MessageReplacement... messageReplacements) {
+        return new Failure<>(failureReason, Message.of(failureReason, messageReplacements));
+    }
+
     /**
      * Creates a new success attempt.
      *
@@ -28,7 +61,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      * @return The new success attempt.
      */
     static <T, F extends FailureReason> Attempt<T, F> success(T value) {
-        return new Success<>(value);
+        return successRef(value);
     }
 
     /**
@@ -42,7 +75,7 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      */
     static <T, F extends FailureReason> Attempt<T, F> failure(
             F failureReason, MessageReplacement... messageReplacements) {
-        return new Failure<>(failureReason, Message.of(failureReason, "Failed!", messageReplacements));
+        return failureRef(failureReason, messageReplacements);
     }
 
     /**
@@ -203,6 +236,33 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
      */
     <U> Attempt<U, F> mapAttempt(Supplier<Attempt<U, F>> mapper);
 
+    /**
+     * Fails this attempt with the given failure attempt if the value matches the given predicate.This will do nothing
+     * if this is already a failure attempt.
+     *
+     * @param predicate         The predicate to test the value.
+     * @param failureAttempt    The failure attempt to return if the predicate matches.
+     * @return The new attempt
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    Attempt<T, F> failIf(Predicate<? super T> predicate, Supplier<Attempt.Failure<T, F>> failureAttempt);
+
+    /**
+     * Fails this attempt with the given failure attempt if the value matches the given predicate.This will do nothing
+     * if this is already a failure attempt.
+     *
+     * @param predicate         The predicate to test the value.
+     * @param failureAttempt    The failure attempt to return if the predicate matches, which can be generated based
+     *                          on the value.
+     * @return The new attempt
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    Attempt<T, F> failIf(Predicate<? super T> predicate, Function<? super T, Attempt.Failure<T, F>> failureAttempt);
+
     /**
      * Maps to another attempt with a different fail reason.
      *
@@ -370,6 +430,16 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
             return mapper.get();
         }
 
+        @Override
+        public Attempt<T, F> failIf(Predicate<? super T> predicate, Supplier<Attempt.Failure<T, F>> failureAttempt) {
+            return predicate.test(value) ? failureAttempt.get() : this;
+        }
+
+        @Override
+        public Attempt<T, F> failIf(Predicate<? super T> predicate, Function<? super T, Failure<T, F>> failureAttempt) {
+            return predicate.test(value) ? failureAttempt.apply(value) : this;
+        }
+
         @Override
         public <UF extends FailureReason> Attempt<T, UF> transform(UF failureReason) {
             return changeFailureType();
@@ -532,6 +602,16 @@ public sealed interface Attempt<T, F extends FailureReason> permits Attempt.Succ
             return changeValueType();
         }
 
+        @Override
+        public Attempt<T, F> failIf(Predicate<? super T> predicate, Supplier<Attempt.Failure<T, F>> failureAttempt) {
+            return this;
+        }
+
+        @Override
+        public Attempt<T, F> failIf(Predicate<? super T> predicate, Function<? super T, Failure<T, F>> failureAttempt) {
+            return this;
+        }
+
         @Override
         public <UF extends FailureReason> Attempt<T, UF> transform(UF failureReason) {
             return new Failure<>(failureReason, getFailureMessage(), this);

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

@@ -220,7 +220,7 @@ public sealed interface Result<S extends SuccessReason, F extends FailureReason>
 
         Success(S successReason, MessageReplacement[] replacements) {
             this.successReason = successReason;
-            this.message = Message.of(successReason, "Success!", replacements);
+            this.message = Message.of(successReason, replacements);
         }
 
         @Override
@@ -273,7 +273,7 @@ public sealed interface Result<S extends SuccessReason, F extends FailureReason>
 
         Failure(F failureReason, MessageReplacement[] replacements) {
             this.failureReason = failureReason;
-            this.message = Message.of(failureReason, "Failed!", replacements);
+            this.message = Message.of(failureReason, replacements);
         }
 
         @Override

src/main/java/org/mvplugins/multiverse/core/utils/tick/TickDuration.java

@@ -0,0 +1,274 @@
+package org.mvplugins.multiverse.core.utils.tick;
+
+import io.vavr.control.Try;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+
+import java.time.Duration;
+import java.time.LocalTime;
+import java.time.temporal.TemporalUnit;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Represents a duration in Minecraft game ticks.
+ * <p>
+ * This class wraps a {@link Duration} and provides convenient conversion methods
+ * between game ticks (50ms per tick), game days (24,000 ticks), and other time units.
+ * Game time is mapped to real-world seconds via: realSeconds = (ticks * 3.6) + 6*3600 (mod 24h),
+ * which means 00:00 maps to 06:00 in-game time.
+ * </p>
+ *
+ * @since 5.7
+ */
+@ApiStatus.AvailableSince("5.7")
+public final class TickDuration {
+
+    /**
+     * Parses a time string into a {@link TickDuration}.
+     * <br />
+     * Formats supported:
+     * <ul>
+     *   <li>{@code "123"} - raw tick count</li>
+     *   <li>{@code "10s"} - seconds</li>
+     *   <li>{@code "5d"} - game days</li>
+     * </ul>
+     *
+     * @param timeString the time string to parse
+     * @return a {@link Try} containing the parsed {@link TickDuration}, or a failure if parsing fails
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static Try<TickDuration> parseString(@NotNull String timeString) {
+        return Try.of(() -> {
+            if (timeString.endsWith("s")) {
+                String subString = timeString.substring(0, timeString.length() - 1);
+                return of(Long.parseLong(subString), TimeUnit.SECONDS);
+            } else if (timeString.endsWith("d")) {
+                String subString = timeString.substring(0, timeString.length() - 1);
+                return ofGameDays(Long.parseLong(subString));
+            }
+            return ofTicks(Long.parseLong(timeString));
+        });
+    }
+
+    /**
+     * Creates a {@link TickDuration} from a {@link Duration}.
+     *
+     * @param duration the duration
+     * @return a new {@link TickDuration}
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @Contract(value = "_ -> new", pure = true)
+    public static @NotNull TickDuration ofDuration(@NotNull Duration duration) {
+        return new TickDuration(duration);
+    }
+
+    /**
+     * Creates a {@link TickDuration} from seconds (as a {@link Duration}).
+     *
+     * @param duration the duration representing seconds
+     * @return a new {@link TickDuration}
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @Contract(value = "_ -> new", pure = true)
+    public static @NotNull TickDuration ofSeconds(@NotNull Duration duration) {
+        return new TickDuration(duration);
+    }
+
+    /**
+     * Creates a {@link TickDuration} from a tick count.
+     *
+     * @param ticks the number of game ticks
+     * @return a new {@link TickDuration}
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @Contract(value = "_ -> new", pure = true)
+    public static @NotNull TickDuration ofTicks(long ticks) {
+        return of(ticks, TickUnit.TICK);
+    }
+
+    /**
+     * Creates a {@link TickDuration} from a game day count.
+     *
+     * @param gameDays the number of game days (24,000 ticks each)
+     * @return a new {@link TickDuration}
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @Contract(value = "_ -> new", pure = true)
+    public static @NotNull TickDuration ofGameDays(long gameDays) {
+        return of(gameDays, TickUnit.GAME_DAY);
+    }
+
+    /**
+     * Creates a {@link TickDuration} from a time value and {@link TimeUnit}.
+     *
+     * @param time the time value
+     * @param unit the time unit
+     * @return a new {@link TickDuration}
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @Contract(value = "_, _ -> new", pure = true)
+    public static @NotNull TickDuration of(long time, @NotNull TimeUnit unit) {
+        return of(time, unit.toChronoUnit());
+    }
+
+    /**
+     * Creates a {@link TickDuration} from a time value and {@link TemporalUnit}.
+     *
+     * @param time the time value
+     * @param unit the temporal unit
+     * @return a new {@link TickDuration}
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @Contract(value = "_, _ -> new", pure = true)
+    public static @NotNull TickDuration of(long time, @NotNull TemporalUnit unit) {
+        return new TickDuration(Duration.of(time, unit));
+    }
+
+    private static final double TIME_MULTIPLIER = 3.6;
+    private static final long DAY_SECONDS = 24 * 60 * 60;
+    private static final long START_OFFSET = 6 * 60 * 60;
+
+    private final Duration duration;
+
+    /**
+     * Creates a {@link TickDuration} from a {@link Duration}.
+     *
+     * @param duration the underlying duration
+     */
+    private TickDuration(@NotNull Duration duration) {
+        this.duration = duration;
+    }
+
+    /**
+     * Converts this duration to Minecraft local time.
+     * <p>
+     * Maps the duration to real-world seconds using the formula:
+     * realSeconds = (ticks * 3.6) + 6*3600 (mod 24h)
+     * </p>
+     *
+     * @return the {@link LocalTime} in Minecraft time (where 00:00 = 06:00 in-game)
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public @NotNull LocalTime toLocalTime() {
+        // Minecraft maps ticks -> seconds by: realSeconds = (ticks * 3.6) + 6*3600 (mod 24h)
+        long realSeconds = (long) ((toTicks() * TIME_MULTIPLIER) + START_OFFSET) % DAY_SECONDS;
+        return LocalTime.ofSecondOfDay(realSeconds);
+    }
+
+    /**
+     * Converts this duration to game ticks.
+     *
+     * @return the number of game ticks (1 tick = 50ms)
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public long toTicks() {
+        return duration.toMillis() / TickUnit.TICK.inMillis();
+    }
+
+    /**
+     * Converts this duration to game days.
+     *
+     * @return the number of game days (1 day = 24,000 ticks)
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public double toGameDays() {
+        return (double) duration.toMillis() / (double) TickUnit.GAME_DAY.inMillis();
+    }
+
+    /**
+     * Converts this duration to seconds.
+     *
+     * @return the duration in seconds
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public double toSeconds() {
+        return to(TimeUnit.SECONDS);
+    }
+
+    /**
+     * Converts this duration to a specified {@link TimeUnit}.
+     *
+     * @param unit the target time unit
+     * @return the duration in the specified unit
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public double to(@NotNull TimeUnit unit) {
+        return to(unit.toChronoUnit());
+    }
+
+    /**
+     * Converts this duration to a specified {@link TemporalUnit}.
+     *
+     * @param unit the target temporal unit
+     * @return the duration in the specified unit
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public double to(@NotNull TemporalUnit unit) {
+        return (double) duration.toMillis() / (double) unit.getDuration().toMillis();
+    }
+
+    /**
+     * Checks whether this duration is an exact multiple of the given {@link TimeUnit}.
+     *
+     * @param unit the time unit to test against
+     * @return {@code true} if this duration divides evenly by the unit, otherwise {@code false}
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public boolean isExactTo(@NotNull TimeUnit unit) {
+        return isExactTo(unit.toChronoUnit());
+    }
+
+    /**
+     * Checks whether this duration is an exact multiple of the given {@link TemporalUnit}.
+     *
+     * @param unit the temporal unit to test against
+     * @return {@code true} if this duration divides evenly by the unit, otherwise {@code false}
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public boolean isExactTo(@NotNull TemporalUnit unit) {
+        return duration.toMillis() % unit.getDuration().toMillis() == 0;
+    }
+
+    /**
+     * Returns the underlying {@link Duration}.
+     *
+     * @return the duration
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public Duration getDuration() {
+        return duration;
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/tick/TickUnit.java

@@ -0,0 +1,112 @@
+package org.mvplugins.multiverse.core.utils.tick;
+
+import org.jetbrains.annotations.ApiStatus;
+
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
+import java.time.temporal.Temporal;
+import java.time.temporal.TemporalUnit;
+
+/**
+ * A {@link TemporalUnit} implementation for Minecraft game ticks.
+ * <br />
+ * Provides two standard units:
+ * <ul>
+ *   <li>{@link #TICK} - A single game tick (50 milliseconds)</li>
+ *   <li>{@link #GAME_DAY} - A full game day (24,000 ticks)</li>
+ * </ul>
+ * This unit is not date-based and is precisely defined without estimation.
+ *
+ * @since 5.7
+ */
+@ApiStatus.AvailableSince("5.7")
+public final class TickUnit implements TemporalUnit {
+
+    private static final long SINGLE_TICK_DURATION_MS = 50L;
+    private static final long TICKS_PER_GAME_DAY = 24_000L;
+
+    /**
+     * A single game tick (50 milliseconds).
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static final TickUnit TICK = new TickUnit(SINGLE_TICK_DURATION_MS);
+
+    /**
+     * A full game day (24,000 ticks = 20 minutes in real time).
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public static final TickUnit GAME_DAY = new TickUnit(SINGLE_TICK_DURATION_MS * TICKS_PER_GAME_DAY);
+
+    private final long milliseconds;
+    private final Duration duration;
+
+    private TickUnit(long milliseconds) {
+        this.milliseconds = milliseconds;
+        this.duration = Duration.ofMillis(milliseconds);
+    }
+
+    /**
+     * Gets the duration of this unit in milliseconds.
+     *
+     * @return the duration in milliseconds
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public long inMillis() {
+        return milliseconds;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public Duration getDuration() {
+        return duration;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean isDurationEstimated() {
+        return false;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean isDateBased() {
+        return false;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean isTimeBased() {
+        return true;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @SuppressWarnings("unchecked") // following ChronoUnit#addTo
+    @Override
+    public <R extends Temporal> R addTo(R temporal, long amount) {
+        return (R) temporal.plus(duration.multipliedBy(amount));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public long between(final Temporal start, final Temporal end) {
+        return start.until(end, ChronoUnit.MILLIS) / milliseconds;
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/webpaste/HttpAPIClient.java

@@ -16,6 +16,9 @@ import javax.net.ssl.HttpsURLConnection;
  * HTTP API-client.
  */
 abstract sealed class HttpAPIClient permits PasteService, URLShortener {
+
+    static final String DUMPS_VIEWER_URL = "https://mvdumps.c0ding.party/";
+
     /**
      * The URL for this API-request, and if necessary, the access token.
      * If an access token is not necessary, it should be set to null.

src/main/java/org/mvplugins/multiverse/core/utils/webpaste/McloGsPasteService.java

@@ -34,7 +34,9 @@ final class McloGsPasteService extends PasteService {
     public String postData(String data) throws PasteFailedException {
         try {
             String stringJSON = this.exec(encodeData(data), ContentType.URLENCODED); // Execute request
-            return String.valueOf(((JSONObject) new JSONParser(JSONParser.DEFAULT_PERMISSIVE_MODE).parse(stringJSON)).get("url")); // Interpret result
+            return DUMPS_VIEWER_URL +
+                    ((JSONObject) new JSONParser(JSONParser.DEFAULT_PERMISSIVE_MODE).parse(stringJSON)).get("id") +
+                    "?service=mclogs";
         } catch (IOException | ParseException e) {
             throw new PasteFailedException(e);
         }
@@ -44,7 +46,9 @@ final class McloGsPasteService extends PasteService {
     public String postData(Map<String, String> data) throws PasteFailedException {
         try {
             String stringJSON = this.exec(encodeData(data), ContentType.JSON); // Execute request
-            return String.valueOf(((JSONObject) new JSONParser(JSONParser.DEFAULT_PERMISSIVE_MODE).parse(stringJSON)).get("url")); // Interpret result
+            return DUMPS_VIEWER_URL +
+                    ((JSONObject) new JSONParser(JSONParser.DEFAULT_PERMISSIVE_MODE).parse(stringJSON)).get("id") +
+                    "?service=mclogs";
         } catch (IOException | ParseException e) {
             throw new PasteFailedException(e);
         }

src/main/java/org/mvplugins/multiverse/core/utils/webpaste/PastebinPasteService.java

@@ -26,7 +26,7 @@ final class PastebinPasteService extends PasteService {
                 "&" + URLEncoder.encode("api_option", StandardCharsets.UTF_8) + "=" + URLEncoder.encode("paste", StandardCharsets.UTF_8) +
                 "&" + URLEncoder.encode("api_paste_code", StandardCharsets.UTF_8) + "=" + URLEncoder.encode(data, StandardCharsets.UTF_8) +
                 "&" + URLEncoder.encode("api_paste_private", StandardCharsets.UTF_8) + "=" + URLEncoder.encode(this.isPrivate ? "1" : "0", StandardCharsets.UTF_8) +
-                "&" + URLEncoder.encode("api_paste_format", StandardCharsets.UTF_8) + "=" + URLEncoder.encode("yaml", StandardCharsets.UTF_8) +
+                "&" + URLEncoder.encode("api_paste_format", StandardCharsets.UTF_8) + "=" + URLEncoder.encode("json", StandardCharsets.UTF_8) +
                 "&" + URLEncoder.encode("api_paste_name", StandardCharsets.UTF_8) + "=" + URLEncoder.encode("Multiverse-Core Debug Info", StandardCharsets.UTF_8);
     }
 

src/main/java/org/mvplugins/multiverse/core/utils/webpaste/PastesDevPasteService.java

@@ -39,8 +39,9 @@ final class PastesDevPasteService extends PasteService {
     @Override
     public String postData(String data) throws PasteFailedException {
         try {
-            String stringJSON = this.exec(encodeData(data), ContentType.PLAINTEXT_YAML);
-            return "https://pastes.dev/" + ((JSONObject) new JSONParser(JSONParser.DEFAULT_PERMISSIVE_MODE).parse(stringJSON)).get("key");
+            String stringJSON = this.exec(encodeData(data), ContentType.JSON);
+            return DUMPS_VIEWER_URL +
+                    ((JSONObject) new JSONParser(JSONParser.DEFAULT_PERMISSIVE_MODE).parse(stringJSON)).get("key");
         } catch (IOException | ParseException e) {
             throw new PasteFailedException(e);
         }

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

@@ -39,7 +39,7 @@ public final class LoadedMultiverseWorld extends MultiverseWorld {
             @NotNull LocationManipulation locationManipulation,
             @NotNull EntityPurger entityPurger
     ) {
-        super(world.getName(), worldConfig, config);
+        super(worldConfig, config);
         this.worldUid = world.getUID();
         this.blockSafety = blockSafety;
         this.locationManipulation = locationManipulation;
@@ -55,6 +55,7 @@ public final class LoadedMultiverseWorld extends MultiverseWorld {
         worldConfig.load();
         worldConfig.setEnvironment(world.getEnvironment());
         worldConfig.setSeed(world.getSeed());
+        worldConfig.setLegacyWorldName(world.getName());
     }
 
     private void setupSpawnLocation(World world) {
@@ -77,7 +78,7 @@ public final class LoadedMultiverseWorld extends MultiverseWorld {
             Logging.fine("Spawn location from world.dat file was unsafe!!");
             Logging.fine("NOT adjusting spawn for '" + this.getAliasOrName() + "' because you told me not to.");
             Logging.fine("To turn on spawn adjustment for this world simply type:");
-            Logging.fine("/mvm set adjustspawn true " + this.getAliasOrName());
+            Logging.fine("/mv modify %s set adjust-spawn true", getName());
             return location;
         }
 
@@ -173,7 +174,7 @@ public final class LoadedMultiverseWorld extends MultiverseWorld {
      * {@inheritDoc}
      */
     @Override
-    void setWorldConfig(WorldConfig worldConfig) {
+    void setWorldConfig(@NotNull WorldConfig worldConfig) {
         super.setWorldConfig(worldConfig);
         setupWorldConfig(getBukkitWorld().get());
     }
@@ -184,7 +185,8 @@ public final class LoadedMultiverseWorld extends MultiverseWorld {
     @Override
     public String toString() {
         return "LoadedMultiverseWorld{"
-                + "name='" + worldName + "', "
+                + "key='" + getKey() + "', "
+                + "name='" + getName() + "', "
                 + "env='" + getEnvironment() + "', "
                 + "type='" + getWorldType().getOrNull() + "', "
                 + "gen='" + getGenerator() + "'"

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

@@ -1,6 +1,9 @@
 package org.mvplugins.multiverse.core.world;
 
+import java.io.File;
+import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 
 import com.google.common.base.Strings;
 import io.vavr.control.Option;
@@ -10,14 +13,17 @@ import org.bukkit.Difficulty;
 import org.bukkit.GameMode;
 import org.bukkit.Location;
 import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
 import org.bukkit.World;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import org.jetbrains.annotations.UnmodifiableView;
 import org.mvplugins.multiverse.core.config.CoreConfig;
 import org.mvplugins.multiverse.core.config.handle.StringPropertyHandle;
 import org.mvplugins.multiverse.core.utils.text.ChatTextFormatter;
+import org.mvplugins.multiverse.core.world.helpers.WorldFolderResolver;
 import org.mvplugins.multiverse.core.world.location.SpawnLocation;
 import org.mvplugins.multiverse.core.world.entity.EntitySpawnConfig;
 
@@ -25,11 +31,6 @@ import org.mvplugins.multiverse.core.world.entity.EntitySpawnConfig;
  * Represents a world handled by Multiverse which has all the custom properties provided by Multiverse.
  */
 public sealed class MultiverseWorld permits LoadedMultiverseWorld {
-    /**
-     * This world's name.
-     */
-    protected final String worldName;
-
     /**
      * This world's configuration.
      */
@@ -38,8 +39,7 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
     protected final CoreConfig config;
     private String colourlessAlias = "";
 
-    MultiverseWorld(String worldName, WorldConfig worldConfig, CoreConfig config) {
-        this.worldName = worldName;
+    MultiverseWorld(WorldConfig worldConfig, CoreConfig config) {
         this.worldConfig = worldConfig;
         this.config = config;
         this.worldConfig.setMVWorld(this);
@@ -47,15 +47,46 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
     }
 
     /**
-     * Gets the name of this world. The name cannot be changed.
+     * The key that represents this world. This should now be used as the unique key for the world instead
+     * of the world name. Also note that the key cannot be modified.
+     *
+     * @return The world key
+     */
+    @ApiStatus.AvailableSince("5.7")
+    @NotNull
+    public NamespacedKey getKey() {
+        return worldConfig.getWorldKeyOrName().usableKey();
+    }
+
+    /**
+     * Gets the name of this world. Prefer to use {@link #getKey()} as unique id instead of this name.
+     * Also note that the name cannot be modified.
      * <br/>
-     * Note for plugin developers: Usually {@link #getAliasOrName()}
-     * is what you want to use instead of this method.
+     * Note for plugin developers: Usually {@link #getAliasOrName()}is what you want to use instead of this method.
      *
      * @return The name of the world as a String.
      */
+    @NotNull
     public String getName() {
-        return worldName;
+        return worldConfig.getLegacyWorldName();
+    }
+
+    /**
+     * Gets the folder where all the world contents are stored in. Generally, the location of the folder is at the server
+     * roots directory for pre-26.1 servers, and at "[level]/dimensions" folder under the world level directory for
+     * 26.1+ PaperMC servers.
+     * <br />
+     * Note this folder location is based on Multiverse's understanding of Paper and Spigot's folder structure. If the
+     * server software does something weird, this folder will not reflect the actual world folder location.
+     * <br />
+     * If the world is loaded, you should use {@link World#getWorldFolder()} instead as it is more accurate.
+     * This method is more of a fallback for when the world is not loaded.
+     *
+     * @return The world folder.
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public File getOfflineWorldFolder() {
+        return WorldFolderResolver.resolve(this);
     }
 
     /**
@@ -144,7 +175,7 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
      * @return The alias of the world as a String.
      */
     public String getAliasOrName() {
-        return Strings.isNullOrEmpty(worldConfig.getAlias()) ? worldName : worldConfig.getAlias();
+        return Strings.isNullOrEmpty(worldConfig.getAlias()) ? getName() : worldConfig.getAlias();
     }
 
     /**
@@ -393,6 +424,19 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
         return worldConfig.getGenerator();
     }
 
+    /**
+     * Gets the generator settings used to create this world. You cannot change this after world creation.
+     * Changing this manually in config on existing world will have no effect on the world generation.
+     *
+     * @return The generator settings string.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public String getGeneratorSettings() {
+        return worldConfig.getGeneratorSettings();
+    }
+
     /**
      * Gets whether or not this world will display in chat, mvw and mvl regardless if a user has the
      * access permissions to go to this world.
@@ -454,6 +498,59 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
         return worldConfig.setKeepSpawnInMemory(keepSpawnInMemory);
     }
 
+    /**
+     * Get all meta key-value pairs for this world. This is an unmodifiable view of the internal map, so changes to
+     * the world meta will be reflected in this map, but attempts to modify this map will throw an exception.
+     *
+     * @return An unmodifiable view of all meta key-value pairs for this world.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public @UnmodifiableView Map<String, String> getAllMeta() {
+        return Collections.unmodifiableMap(worldConfig.getMeta());
+    }
+
+    /**
+     * Gets the meta value for the given key if it exists.
+     *
+     * @param key The meta key to look up, may be {@code null} in which case an empty result is returned.
+     * @return An {@link Option} containing the meta value if present, otherwise an empty {@link Option}.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public @NotNull Option<String> getMeta(@Nullable String key) {
+        return Option.of(worldConfig.getMeta().get(key));
+    }
+
+    /**
+     * Sets a meta key-value pair for this world. Existing value for the key will be replaced.
+     *
+     * @param key The meta key to set, must not be {@code null}.
+     * @param value The meta value to set.
+     * @return Result of setting the property.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public @NotNull Try<Void> setMeta(@NotNull String key, @Nullable String value) {
+        return worldConfig.setMeta(key, value);
+    }
+
+    /**
+     * Removes the meta entry associated with the given key.
+     *
+     * @param key The meta key to remove.
+     * @return Result of removing the property.
+     *
+     * @since 5.7
+     */
+    @ApiStatus.AvailableSince("5.7")
+    public @NotNull Try<Void> removeMeta(@NotNull String key) {
+        return worldConfig.removeMeta(key);
+    }
+
     /**
      * Gets the player limit for this world after which players without an override
      * permission node will not be allowed in. A value of -1 or less signifies no limit
@@ -689,7 +786,7 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
      *
      * @return The world config.
      */
-    WorldConfig getWorldConfig() {
+    @NotNull WorldConfig getWorldConfig() {
         return worldConfig;
     }
 
@@ -698,7 +795,7 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
      *
      * @param worldConfig   The world config.
      */
-    void setWorldConfig(WorldConfig worldConfig) {
+    void setWorldConfig(@NotNull WorldConfig worldConfig) {
         this.worldConfig = worldConfig;
     }
 
@@ -708,7 +805,8 @@ public sealed class MultiverseWorld permits LoadedMultiverseWorld {
     @Override
     public String toString() {
         return "MultiverseWorld{"
-                + "name='" + worldName + "', "
+                + "key='" + getKey() + "', "
+                + "name='" + getName() + "', "
                 + "env='" + getEnvironment() + "', "
                 + "gen='" + getGenerator() + "'"
                 + '}';

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

@@ -1,5 +1,7 @@
 package org.mvplugins.multiverse.core.world;
 
+import org.mvplugins.multiverse.core.world.key.WorldKeyOrName;
+
 import java.util.List;
 
 /**
@@ -8,5 +10,5 @@ import java.util.List;
  * @param newWorlds     List of the new WorldConfigs added
  * @param removedWorlds List of the worlds removed from the config
  */
-record NewAndRemovedWorlds(List<WorldConfig> newWorlds, List<String> removedWorlds) {
+record NewAndRemovedWorlds(List<WorldConfig> newWorlds, List<WorldKeyOrName> removedWorlds) {
 }