diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineBlocks.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineBlocks.java
index 1cad23f69..93ec4c025 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineBlocks.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineBlocks.java
@@ -27,10 +27,28 @@ import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Map;
+
 public final class CraftEngineBlocks {
 
     private CraftEngineBlocks() {}
 
+    /**
+     *
+     * Returns an unmodifiable map of all currently loaded custom blocks.
+     * The map keys represent unique identifiers, and the values are the corresponding CustomBlock instances.
+     *
+     * <p><strong>Important:</strong> Do not attempt to access this method during the onEnable phase
+     * as it will be empty. Instead, listen for the {@code CraftEngineReloadEvent} and use this method
+     * after the event is fired to obtain the complete block list.
+     *
+     * @return a non-null map containing all loaded custom blocks
+     */
+    @NotNull
+    public static Map<Key, CustomBlock> loadedBlocks() {
+        return BukkitBlockManager.instance().loadedBlocks();
+    }
+
     /**
      * Gets a custom block by ID
      *
diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineFurniture.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineFurniture.java
index 113fc0d93..d7367e5cd 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineFurniture.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineFurniture.java
@@ -27,11 +27,27 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
+import java.util.Map;
 
 public final class CraftEngineFurniture {
 
     private CraftEngineFurniture() {}
 
+    /**
+     * Returns an unmodifiable map of all currently loaded custom furniture.
+     * The map keys represent unique identifiers, and the values are the corresponding CustomFurniture instances.
+     *
+     * <p><strong>Important:</strong> Do not attempt to access this method during the onEnable phase
+     * as it will be empty. Instead, listen for the {@code CraftEngineReloadEvent} and use this method
+     * after the event is fired to obtain the complete furniture list.
+     *
+     * @return a non-null map containing all loaded custom furniture
+     */
+    @NotNull
+    public static Map<Key, CustomFurniture> loadedFurniture() {
+        return BukkitFurnitureManager.instance().loadedFurniture();
+    }
+
     /**
      * Gets custom furniture by ID
      *
diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineItems.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineItems.java
index 64c628693..2fe0c11c5 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineItems.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineItems.java
@@ -8,10 +8,28 @@ import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Map;
+
 public final class CraftEngineItems {
 
     private CraftEngineItems() {}
 
+    /**
+     * Returns an unmodifiable map of all currently loaded custom items.
+     * The map keys represent unique identifiers, and the values are the corresponding CustomItem instances.
+     *
+     * <p><strong>Important:</strong> Do not attempt to access this method during the onEnable phase
+     * as it will be empty. Instead, listen for the {@code CraftEngineReloadEvent} and use this method
+     * after the event is fired to obtain the complete item list.
+     *
+     * @return a non-null map containing all loaded custom items
+     * @throws IllegalStateException if the BukkitItemManager instance is not available
+     */
+    @NotNull
+    public static Map<Key, CustomItem<ItemStack>> loadedItems() {
+        return BukkitItemManager.instance().loadedItems();
+    }
+
     /**
      * Gets a custom item by ID
      *
diff --git a/core/src/main/java/net/momirealms/craftengine/core/block/AbstractBlockManager.java b/core/src/main/java/net/momirealms/craftengine/core/block/AbstractBlockManager.java
index 96916ea58..0fde49874 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/block/AbstractBlockManager.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/block/AbstractBlockManager.java
@@ -86,7 +86,7 @@ public abstract class AbstractBlockManager extends AbstractModelGenerator implem
     }
 
     @Override
-    public Map<Key, CustomBlock> blocks() {
+    public Map<Key, CustomBlock> loadedBlocks() {
         return Collections.unmodifiableMap(this.byId);
     }
 
diff --git a/core/src/main/java/net/momirealms/craftengine/core/block/BlockManager.java b/core/src/main/java/net/momirealms/craftengine/core/block/BlockManager.java
index 1f6568636..785d13b17 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/block/BlockManager.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/block/BlockManager.java
@@ -24,7 +24,12 @@ public interface BlockManager extends Manageable, ModelGenerator {
 
     Map<Key, JsonElement> modBlockStates();
 
-    Map<Key, CustomBlock> blocks();
+    Map<Key, CustomBlock> loadedBlocks();
+
+    @Deprecated(forRemoval = true)
+    default Map<Key, CustomBlock> blocks() {
+        return loadedBlocks();
+    }
 
     Optional<CustomBlock> blockById(Key key);
 
diff --git a/core/src/main/java/net/momirealms/craftengine/core/entity/furniture/AbstractFurnitureManager.java b/core/src/main/java/net/momirealms/craftengine/core/entity/furniture/AbstractFurnitureManager.java
index f343eb7ea..2e5b56471 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/entity/furniture/AbstractFurnitureManager.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/entity/furniture/AbstractFurnitureManager.java
@@ -58,6 +58,11 @@ public abstract class AbstractFurnitureManager implements FurnitureManager {
         return Optional.ofNullable(this.byId.get(id));
     }
 
+    @Override
+    public Map<Key, CustomFurniture> loadedFurniture() {
+        return Collections.unmodifiableMap(this.byId);
+    }
+
     @Override
     public void unload() {
         this.byId.clear();
diff --git a/core/src/main/java/net/momirealms/craftengine/core/entity/furniture/FurnitureManager.java b/core/src/main/java/net/momirealms/craftengine/core/entity/furniture/FurnitureManager.java
index 2a31d46de..68cf5fa05 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/entity/furniture/FurnitureManager.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/entity/furniture/FurnitureManager.java
@@ -9,6 +9,7 @@ import org.incendo.cloud.suggestion.Suggestion;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.Collection;
+import java.util.Map;
 import java.util.Optional;
 
 public interface FurnitureManager extends Manageable {
@@ -30,6 +31,8 @@ public interface FurnitureManager extends Manageable {
 
     Optional<CustomFurniture> furnitureById(Key id);
 
+    Map<Key, CustomFurniture> loadedFurniture();
+
     boolean isFurnitureRealEntity(int entityId);
 
     @Nullable
diff --git a/core/src/main/java/net/momirealms/craftengine/core/item/AbstractItemManager.java b/core/src/main/java/net/momirealms/craftengine/core/item/AbstractItemManager.java
index f2fb1bba1..61a06df52 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/item/AbstractItemManager.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/item/AbstractItemManager.java
@@ -229,8 +229,8 @@ public abstract class AbstractItemManager<I> extends AbstractModelGenerator impl
     }
 
     @Override
-    public Collection<Key> items() {
-        return Collections.unmodifiableCollection(this.customItemsById.keySet());
+    public Map<Key, CustomItem<I>> loadedItems() {
+        return Collections.unmodifiableMap(this.customItemsById);
     }
 
     @Override
diff --git a/core/src/main/java/net/momirealms/craftengine/core/item/CustomItem.java b/core/src/main/java/net/momirealms/craftengine/core/item/CustomItem.java
index b02cbea0b..bb7a71ed9 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/item/CustomItem.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/item/CustomItem.java
@@ -16,6 +16,10 @@ import java.util.Optional;
 
 public interface CustomItem<I> extends BuildableItem<I> {
 
+    /**
+     * Since CraftEngine allows users to add certain functionalities to vanilla items, this custom item might actually be a vanilla item.
+     * This will be refactored before the 1.0 release, but no changes will be made for now to ensure compatibility.
+     */
     boolean isVanillaItem();
 
     Key id();
diff --git a/core/src/main/java/net/momirealms/craftengine/core/item/ItemManager.java b/core/src/main/java/net/momirealms/craftengine/core/item/ItemManager.java
index 4f34eff44..a255c23de 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/item/ItemManager.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/item/ItemManager.java
@@ -54,7 +54,12 @@ public interface ItemManager<T> extends Manageable, ModelGenerator {
 
     Item<T> fromByteArray(byte[] bytes);
 
-    Collection<Key> items();
+    Map<Key, CustomItem<T>> loadedItems();
+
+    @Deprecated(forRemoval = true)
+    default Collection<Key> items() {
+        return loadedItems().keySet();
+    }
 
     ExternalItemSource<T> getExternalItemSource(String name);
 
diff --git a/core/src/main/java/net/momirealms/craftengine/core/world/CEWorld.java b/core/src/main/java/net/momirealms/craftengine/core/world/CEWorld.java
index cc9ccc239..c5c9f5249 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/world/CEWorld.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/world/CEWorld.java
@@ -1,6 +1,5 @@
 package net.momirealms.craftengine.core.world;
 
-import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue;
 import ca.spottedleaf.concurrentutil.map.ConcurrentLong2ReferenceChainedHashTable;
 import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet;
 import net.momirealms.craftengine.core.block.ImmutableBlockState;