diff --git a/eternalcombat-plugin/src/main/java/com/eternalcode/combat/config/implementation/PluginConfig.java b/eternalcombat-plugin/src/main/java/com/eternalcode/combat/config/implementation/PluginConfig.java
index bc29665..fea6797 100644
--- a/eternalcombat-plugin/src/main/java/com/eternalcode/combat/config/implementation/PluginConfig.java
+++ b/eternalcombat-plugin/src/main/java/com/eternalcode/combat/config/implementation/PluginConfig.java
@@ -147,11 +147,13 @@ public class PluginConfig extends OkaeriConfig {
         public Duration combatTimerDuration = Duration.ofSeconds(20);
 
         @Comment({
-            "# List of worlds where combat logging is disabled.",
-            "# Players in these worlds will not be tagged or affected by combat rules."
+            "# List of worlds where combat logging is enabled (whitelist).",
+            "# Only players in these worlds will be tagged and affected by combat rules."
         })
-        public List<String> ignoredWorlds = List.of(
-            "your_world"
+        public List<String> allowedWorlds = List.of(
+            "world",
+            "world_nether",
+            "world_the_end"
         );
     }
 }
diff --git a/eternalcombat-plugin/src/main/java/com/eternalcode/combat/crystalpvp/EndCrystalListener.java b/eternalcombat-plugin/src/main/java/com/eternalcode/combat/crystalpvp/EndCrystalListener.java
index df47e44..ef96fd4 100644
--- a/eternalcombat-plugin/src/main/java/com/eternalcode/combat/crystalpvp/EndCrystalListener.java
+++ b/eternalcombat-plugin/src/main/java/com/eternalcode/combat/crystalpvp/EndCrystalListener.java
@@ -47,7 +47,7 @@ public class EndCrystalListener implements Listener {
             return;
         }
 
-        if (pluginConfig.settings.ignoredWorlds.contains(event.getEntity().getWorld().getName())) {
+        if (!pluginConfig.settings.allowedWorlds.contains(event.getEntity().getWorld().getName())) {
             return;
         }
 
diff --git a/eternalcombat-plugin/src/main/java/com/eternalcode/combat/crystalpvp/RespawnAnchorListener.java b/eternalcombat-plugin/src/main/java/com/eternalcode/combat/crystalpvp/RespawnAnchorListener.java
index 057c886..688e92d 100644
--- a/eternalcombat-plugin/src/main/java/com/eternalcode/combat/crystalpvp/RespawnAnchorListener.java
+++ b/eternalcombat-plugin/src/main/java/com/eternalcode/combat/crystalpvp/RespawnAnchorListener.java
@@ -69,7 +69,7 @@ public class RespawnAnchorListener implements Listener {
             return;
         }
 
-        if (pluginConfig.settings.ignoredWorlds.contains(event.getEntity().getWorld().getName())) {
+        if (!pluginConfig.settings.allowedWorlds.contains(event.getEntity().getWorld().getName())) {
             return;
         }
 
diff --git a/eternalcombat-plugin/src/main/java/com/eternalcode/combat/fight/controller/FightTagController.java b/eternalcombat-plugin/src/main/java/com/eternalcode/combat/fight/controller/FightTagController.java
index bd9a36d..74ad87b 100644
--- a/eternalcombat-plugin/src/main/java/com/eternalcode/combat/fight/controller/FightTagController.java
+++ b/eternalcombat-plugin/src/main/java/com/eternalcode/combat/fight/controller/FightTagController.java
@@ -124,7 +124,8 @@ public class FightTagController implements Listener {
     private boolean isPlayerInDisabledWorld(Player player) {
         String worldName = player.getWorld().getName();
 
-        return this.config.settings.ignoredWorlds.contains(worldName);
+        // Treat allowedWorlds as a whitelist: if the world is not listed, consider it disabled
+        return !this.config.settings.allowedWorlds.contains(worldName);
     }
 
 
diff --git a/eternalcombat-plugin/src/resources/config.yml b/eternalcombat-plugin/src/resources/config.yml
index 7bb2fda..fbb377d 100644
--- a/eternalcombat-plugin/src/resources/config.yml
+++ b/eternalcombat-plugin/src/resources/config.yml
@@ -16,12 +16,13 @@ settings:
   # The duration (in seconds) that a player remains in combat after being attacked.
   # After this time expires, the player will no longer be considered in combat.
   combatTimerDuration: 20s
-  # List of worlds where combat logging is disabled.
-  # Players in these worlds will not be tagged or affected by combat rules.
-  ignoredWorlds:
-  - HB1-hub
-  - Ancient_Plateau
-  # - More to come when Multiverse is set up fully.
+  # List of worlds where combat logging is enabled (whitelist).
+  # Only players in these worlds will be tagged and affected by combat rules.
+  allowedWorlds:
+  - world
+  - world_nether
+  - world_the_end
+  # - Add more worlds here if needed.
 #
 # Settings related to Ender Pearls.
 # Configure cooldowns, restrictions, and other behaviors for Ender Pearls during combat.