diff --git a/src/main/java/com/volmit/iris/core/tools/IrisReflectiveAPI.java b/src/main/java/com/volmit/iris/core/tools/IrisReflectiveAPI.java
new file mode 100644
index 000000000..c52076f7c
--- /dev/null
+++ b/src/main/java/com/volmit/iris/core/tools/IrisReflectiveAPI.java
@@ -0,0 +1,40 @@
+package com.volmit.iris.core.tools;
+
+import com.volmit.iris.util.data.B;
+import org.bukkit.World;
+import org.bukkit.block.data.BlockData;
+
+/**
+ * This class is used by an external IrisLib for other plugins to interact with Iris. Do not change
+ * existing methods or their parameters as it will break the library that uses these methods
+ * feel free to add more methods so long as you also add the reflective methods to the library
+ */
+public class IrisReflectiveAPI {
+    public static boolean isIrisWorld(World world) {
+        return IrisToolbelt.isIrisWorld(world);
+    }
+
+    public static boolean isIrisStudioWorld(World world) {
+        return IrisToolbelt.isIrisStudioWorld(world);
+    }
+
+    public static void registerCustomBlockData(String namespace, String key, BlockData blockData) {
+        B.registerCustomBlockData(namespace, key, blockData);
+    }
+
+    public static void retainMantleData(String classname) {
+        IrisToolbelt.retainMantleDataForSlice(classname);
+    }
+
+    public static void setMantleData(World world, int x, int y, int z, Object data) {
+        IrisToolbelt.access(world).getEngine().getMantle().getMantle().set(x, y, z, data);
+    }
+
+    public static void deleteMantleData(World world, int x, int y, int z, Class c) {
+        IrisToolbelt.access(world).getEngine().getMantle().getMantle().remove(x, y, z, c);
+    }
+
+    public static Object getMantleData(World world, int x, int y, int z, Class c) {
+        return IrisToolbelt.access(world).getEngine().getMantle().getMantle().get(x, y, z, c);
+    }
+}
diff --git a/src/main/java/com/volmit/iris/core/tools/IrisToolbelt.java b/src/main/java/com/volmit/iris/core/tools/IrisToolbelt.java
index cb0413d8c..4998e13e8 100644
--- a/src/main/java/com/volmit/iris/core/tools/IrisToolbelt.java
+++ b/src/main/java/com/volmit/iris/core/tools/IrisToolbelt.java
@@ -235,45 +235,4 @@ public class IrisToolbelt {
         if(e == null) {return;}
         e.getEngine().getMantle().getMantle().remove(x, y - world.getMinHeight(), z, of);
     }
-
-    /////////////////// REFLECTIVE METHODS //////////////////////////
-    // Copy this stuff to your project, it's safe to use with a
-    // bukkit api only.
-    /////////////////////////////////////////////////////////////////
-
-    public static void setup() throws Throwable {
-        Method m = Class.forName("com.volmit.iris.core.tools.IrisToolbelt").getDeclaredMethod("retainMantleDataForSlice", String.class);
-        m.invoke(null, String.class.getCanonicalName());
-        m.invoke(null, BlockData.class.getCanonicalName());
-    }
-
-    public static boolean hasMantleObject(World world, int x, int y, int z) {
-        return getMantleIdentity(world, x, y, z) != -1;
-    }
-
-    public static void deleteMantleBlock(World world, int x, int y, int z) {
-        try {
-            Method m = Class.forName("com.volmit.iris.core.tools.IrisToolbelt").getDeclaredMethod("deleteMantleData", World.class, int.class, int.class, int.class, Class.class);
-            m.invoke(null, world, x, y, z, BlockData.class);
-            m.invoke(null, world, x, y, z, String.class);
-        } catch(Throwable ignored) {}
-    }
-
-    public static BlockData getMantleBlock(World world, int x, int y, int z) {
-        try {
-            Method m = Class.forName("com.volmit.iris.core.tools.IrisToolbelt").getDeclaredMethod("getMantleData", World.class, int.class, int.class, int.class, Class.class);
-            BlockData s = (BlockData) m.invoke(null, world, x, y, z, BlockData.class);
-            if(s != null) {return s;}
-        } catch(Throwable ignored) {}
-        return null;
-    }
-
-    public static int getMantleIdentity(World world, int x, int y, int z) {
-        try {
-            Method m = Class.forName("com.volmit.iris.core.tools.IrisToolbelt").getDeclaredMethod("getMantleData", World.class, int.class, int.class, int.class, Class.class);
-            String s = (String) m.invoke(null, world, x, y, z, String.class);
-            if(s != null) {return Integer.parseInt(s.split("\\Q@\\E")[1]);}
-        } catch(Throwable ignored) {}
-        return -1;
-    }
 }
diff --git a/src/main/java/com/volmit/iris/util/data/B.java b/src/main/java/com/volmit/iris/util/data/B.java
index b0342b9ee..72dff8a99 100644
--- a/src/main/java/com/volmit/iris/util/data/B.java
+++ b/src/main/java/com/volmit/iris/util/data/B.java
@@ -22,6 +22,7 @@ import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.service.RegistrySVC;
 import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.scheduling.ChronoLatch;
 import it.unimi.dsi.fastutil.ints.Int2IntMap;
 import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
@@ -34,6 +35,7 @@ import org.bukkit.block.data.BlockData;
 import org.bukkit.block.data.Waterlogged;
 import org.bukkit.block.data.type.Leaves;
 import org.bukkit.block.data.type.PointedDripstone;
+import org.checkerframework.checker.units.qual.K;
 
 import java.util.Arrays;
 import java.util.HashMap;
@@ -44,6 +46,8 @@ import java.util.stream.Collectors;
 import static org.bukkit.Material.*;
 
 public class B {
+    private static final KMap<String, BlockData> custom = new KMap<>();
+
     private static final Material AIR_MATERIAL = Material.AIR;
     private static final BlockData AIR = AIR_MATERIAL.createBlockData();
     private static final IntSet foliageCache = buildFoliageCache();
@@ -405,6 +409,11 @@ public class B {
         try {
             String bd = bdxf.trim();
 
+            if(!custom.isEmpty() && custom.containsKey(bd))
+            {
+                return custom.get(bd);
+            }
+
             if(bd.startsWith("minecraft:cauldron[level=")) {
                 bd = bd.replaceAll("\\Q:cauldron[\\E", ":water_cauldron[");
             }
@@ -660,6 +669,8 @@ public class B {
             e.printStackTrace();
         }
 
+        bt.addAll(custom.k());
+
         try {
             bt.addAll(Iris.service(RegistrySVC.class).getCustomBlockRegistry().compile());
         } catch(Throwable e) {
@@ -683,4 +694,8 @@ public class B {
     public static boolean isWaterLogged(BlockData b) {
         return (b instanceof Waterlogged) && ((Waterlogged) b).isWaterlogged();
     }
+
+    public static void registerCustomBlockData(String namespace, String key, BlockData blockData) {
+        custom.put(namespace + ":" + key, blockData);
+    }
 }