diff --git a/pom.xml b/pom.xml
index 579ec79..60d9bc5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -8,8 +8,9 @@
     <artifactId>unified-parent</artifactId>
     <version>0.1-SNAPSHOT</version>
     <modules>
+        <module>unified-core</module>
         <module>unified-energy</module>
-        <module>unified</module>
+        <module>unified-plugin</module>
     </modules>
 
     <packaging>pom</packaging>
@@ -108,5 +109,5 @@
             </plugin>
         </plugins>
     </build>
-
+    
 </project>
diff --git a/unified-core/pom.xml b/unified-core/pom.xml
new file mode 100644
index 0000000..1a273a1
--- /dev/null
+++ b/unified-core/pom.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>unified-parent</artifactId>
+        <groupId>io.github.unifiedtechpower.unified</groupId>
+        <version>0.1-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>unified-core</artifactId>
+
+</project>
\ No newline at end of file
diff --git a/unified-core/src/main/java/io/github/unifiedtechpower/unified/core/UnifiedBlockListener.java b/unified-core/src/main/java/io/github/unifiedtechpower/unified/core/UnifiedBlockListener.java
new file mode 100644
index 0000000..c7a472a
--- /dev/null
+++ b/unified-core/src/main/java/io/github/unifiedtechpower/unified/core/UnifiedBlockListener.java
@@ -0,0 +1,21 @@
+package io.github.unifiedtechpower.unified.core;
+
+import org.bukkit.Chunk;
+import org.bukkit.Location;
+import org.jetbrains.annotations.NotNull;
+
+public interface UnifiedBlockListener {
+    
+    /**
+     * Called when a custom block of a plugin with "unified" integration was placed.
+     * @param location The {@link Location} of the block
+     */
+    void handleBlockPlaced(@NotNull Location location);
+    
+    /**
+     * Called when a custom block of a plugin with "unified" integration was destroyed.
+     * @param location The {@link Location} of the block
+     */
+    void handleBlockDestroyed(@NotNull Location location);
+    
+}
diff --git a/unified-core/src/main/java/io/github/unifiedtechpower/unified/core/UnifiedBlockManager.java b/unified-core/src/main/java/io/github/unifiedtechpower/unified/core/UnifiedBlockManager.java
new file mode 100644
index 0000000..e9d2944
--- /dev/null
+++ b/unified-core/src/main/java/io/github/unifiedtechpower/unified/core/UnifiedBlockManager.java
@@ -0,0 +1,63 @@
+package io.github.unifiedtechpower.unified.core;
+
+import org.bukkit.Location;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class UnifiedBlockManager {
+    
+    private static final UnifiedBlockManager INSTANCE = new UnifiedBlockManager();
+    
+    private final List<UnifiedBlockListener> listeners = new ArrayList<>();
+    
+    private UnifiedBlockManager() {
+    }
+    
+    /**
+     * Retrieves the {@link UnifiedBlockManager} instance.
+     * @return The {@link UnifiedBlockManager} instance.
+     */
+    public static UnifiedBlockManager getInstance() {
+        return INSTANCE;
+    }
+    
+    /**
+     * Registers a new {@link UnifiedBlockListener}
+     * @param listener The {@link UnifiedBlockListener} to register
+     */
+    public void registerBlockListener(UnifiedBlockListener listener) {
+        listeners.add(listener);
+    }
+    
+    /**
+     * Invokes {@link UnifiedBlockListener#handleBlockPlaced(Location)} for all registered {@link UnifiedBlockListener listeners}.
+     * @param location The {@link Location} of the placed block
+     * @param ignored A {@link UnifiedBlockListener} that should not be called. Can be null.
+     */
+    public void callBlockPlaced(@NotNull Location location, @Nullable UnifiedBlockListener ignored) {
+        for (var listener : listeners) {
+            if (listener == ignored)
+                continue;
+            
+            listener.handleBlockPlaced(location);
+        }
+    }
+    
+    /**
+     * Invokes {@link UnifiedBlockListener#handleBlockDestroyed(Location)} for all registered {@link UnifiedBlockListener listeners}.
+     * @param location The {@link Location} of the destroyed block
+     * @param ignored A {@link UnifiedBlockListener} that should not be called. Can be null.
+     */
+    public void callBlockDestroyed(@NotNull Location location, @Nullable UnifiedBlockListener ignored) {
+        for (var listener : listeners) {
+            if (listener == ignored)
+                continue;
+            
+            listener.handleBlockDestroyed(location);
+        }
+    }
+    
+}
diff --git a/unified-energy/src/main/java/io/github/unifiedtechpower/unified/energy/manager/EnergyNetworkManager.java b/unified-energy/src/main/java/io/github/unifiedtechpower/unified/energy/manager/EnergyNetworkManager.java
index cca6a5a..427e41b 100644
--- a/unified-energy/src/main/java/io/github/unifiedtechpower/unified/energy/manager/EnergyNetworkManager.java
+++ b/unified-energy/src/main/java/io/github/unifiedtechpower/unified/energy/manager/EnergyNetworkManager.java
@@ -7,6 +7,7 @@
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
+import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 
 /**
@@ -30,6 +31,6 @@ public interface EnergyNetworkManager {
      * @return a {@link CompletableFuture} that completes with the {@link EnergyStorage}s in the given chunk
      */
     @NotNull
-    CompletableFuture<@NotNull List<@NotNull EnergyStorage>> getEnergyStoragesIn(@NotNull Chunk chunk);
+    CompletableFuture<@NotNull Map<@NotNull Location, @NotNull EnergyStorage>> getEnergyStoragesIn(@NotNull Chunk chunk);
     
 }
diff --git a/unified-energy/src/main/java/io/github/unifiedtechpower/unified/energy/manager/UnifiedEnergy.java b/unified-energy/src/main/java/io/github/unifiedtechpower/unified/energy/manager/UnifiedEnergy.java
index e982cd4..b5c4b6c 100644
--- a/unified-energy/src/main/java/io/github/unifiedtechpower/unified/energy/manager/UnifiedEnergy.java
+++ b/unified-energy/src/main/java/io/github/unifiedtechpower/unified/energy/manager/UnifiedEnergy.java
@@ -6,10 +6,7 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.List;
+import java.util.*;
 import java.util.concurrent.CompletableFuture;
 
 /**
@@ -58,7 +55,7 @@ public boolean removeManager(@NotNull EnergyNetworkManager manager) {
         for (var manager : managers)
             futures.add(manager.getEnergyStorageAt(location));
         
-        for (var future : futures) {
+        for (var future : new HashSet<>(futures)) {
             future.thenAccept(storage -> {
                 if (mainFuture.isDone())
                     return;
@@ -83,18 +80,18 @@ public boolean removeManager(@NotNull EnergyNetworkManager manager) {
      * @return a {@link CompletableFuture} that completes with a list of {@link EnergyStorage}s in the given chunk
      */
     @NotNull
-    public CompletableFuture<@NotNull List<@NotNull EnergyStorage>> getEnergyStoragesIn(@NotNull Chunk chunk) {
-        var futures = Collections.synchronizedSet(new HashSet<CompletableFuture<@NotNull List<@NotNull EnergyStorage>>>());
-        var energyStorages = Collections.synchronizedList(new ArrayList<@NotNull EnergyStorage>());
-        var mainFuture = new CompletableFuture<@NotNull List<@NotNull EnergyStorage>>();
+    public CompletableFuture<@NotNull Map<@NotNull Location, @NotNull EnergyStorage>> getEnergyStoragesIn(@NotNull Chunk chunk) {
+        var futures = Collections.synchronizedSet(new HashSet<CompletableFuture<@NotNull Map<@NotNull Location, @NotNull EnergyStorage>>>());
+        var energyStorages = Collections.synchronizedMap(new HashMap<@NotNull Location, @NotNull EnergyStorage>());
+        var mainFuture = new CompletableFuture<@NotNull Map<@NotNull Location, @NotNull EnergyStorage>>();
         
         for (var manager : managers)
             futures.add(manager.getEnergyStoragesIn(chunk));
         
-        for (var future : futures) {
+        for (var future : new HashSet<>(futures)) {
             future.thenAccept(storages -> {
                 if (!storages.isEmpty())
-                    energyStorages.addAll(storages);
+                    energyStorages.putAll(storages);
                 
                 futures.remove(future);
                 if (futures.isEmpty())
diff --git a/unified/pom.xml b/unified-plugin/pom.xml
similarity index 90%
rename from unified/pom.xml
rename to unified-plugin/pom.xml
index bf5ed60..a9c56d5 100644
--- a/unified/pom.xml
+++ b/unified-plugin/pom.xml
@@ -9,16 +9,18 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
-    <artifactId>unified</artifactId>
+    <artifactId>unified-plugin</artifactId>
 
     <properties>
-        <maven.compiler.source>11</maven.compiler.source>
-        <maven.compiler.target>11</maven.compiler.target>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <dir>${project.build.directory}/out</dir>
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>io.github.unifiedtechpower.unified</groupId>
+            <artifactId>unified-core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
         <dependency>
             <groupId>io.github.unifiedtechpower.unified</groupId>
             <artifactId>unified-energy</artifactId>
@@ -53,7 +55,7 @@
                     </filters>
                     <artifactSet>
                         <includes>
-                            <include>io.github.unifiedtechpower.unified:unified-energy</include>
+                            <include>io.github.unifiedtechpower.unified:*</include>
                         </includes>
                     </artifactSet>
                 </configuration>
diff --git a/unified/src/main/java/io/github/unifiedtechpower/unified/Unified.java b/unified-plugin/src/main/java/io/github/unifiedtechpower/unified/Unified.java
similarity index 100%
rename from unified/src/main/java/io/github/unifiedtechpower/unified/Unified.java
rename to unified-plugin/src/main/java/io/github/unifiedtechpower/unified/Unified.java
diff --git a/unified/src/main/resources/plugin.yml b/unified-plugin/src/main/resources/plugin.yml
similarity index 100%
rename from unified/src/main/resources/plugin.yml
rename to unified-plugin/src/main/resources/plugin.yml