diff --git a/build.gradle b/build.gradle
index b5bf3e0..f73ddd8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -29,6 +29,18 @@ dependencies {
 
 	// PSA: Some older mods, compiled on Loom 0.2.1, might have outdated Maven POMs.
 	// You may need to force-disable transitiveness on them.
+
+  // for special leaves blocks like ExtendedLeavesBlock
+	modImplementation "com.terraformersmc.terraform-api:terraform-wood-api-v1:${project.terraform_wood_api_version}"
+	repositories {
+		maven {
+			name = 'TerraformersMC'
+			url = 'https://maven.terraformersmc.com/'
+		}
+		maven {
+			url = 'https://maven.minecraftforge.net/'
+		}
+	}
 }
 
 processResources {
diff --git a/gradle.properties b/gradle.properties
index 4d8825c..3194692 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -9,9 +9,12 @@
 	loader_version=0.14.11
 
 # Mod Properties
-	mod_version = 1.19.3.2
+	mod_version = 1.19.3.3
 	maven_group = de.jottyfan.minecraft
 	archives_base_name = quickiefabric
 
 # Dependencies
 	fabric_version=0.69.1+1.19.3
+
+# for ExtendedLeavesBlock
+  terraform_wood_api_version=5.0.0-beta.1
diff --git a/src/main/java/de/jottyfan/minecraft/quickiefabric/QuickieFabric.java b/src/main/java/de/jottyfan/minecraft/quickiefabric/QuickieFabric.java
index 5a8f2e3..018915f 100644
--- a/src/main/java/de/jottyfan/minecraft/quickiefabric/QuickieFabric.java
+++ b/src/main/java/de/jottyfan/minecraft/quickiefabric/QuickieFabric.java
@@ -20,5 +20,6 @@ public class QuickieFabric implements ModInitializer {
 		RegistryManager.registerFeatures();
 		RegistryManager.registerContainer();
 		RegistryManager.registerLootings();
+		RegistryManager.registerTags();
 	}
 }
diff --git a/src/main/java/de/jottyfan/minecraft/quickiefabric/help/ClassHelper.java b/src/main/java/de/jottyfan/minecraft/quickiefabric/help/ClassHelper.java
deleted file mode 100644
index 3b91f50..0000000
--- a/src/main/java/de/jottyfan/minecraft/quickiefabric/help/ClassHelper.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package de.jottyfan.minecraft.quickiefabric.help;
-
-/**
- *
- * @author jotty
- *
- */
-public class ClassHelper {
-
-	/**
-	 * check if c is instance of name
-	 *
-	 * @param c    the class
-	 * @param name the name
-	 * @return true or false
-	 */
-	public static final Boolean isInstanceOf(Class<?> c, String name) {
-		Class<?>[] a = c.getInterfaces();
-		for (Class<?> cl : a) {
-			String simpleName = cl.getSimpleName();
-			if (simpleName.equals(name)) {
-				return true;
-			}
-		}
-		return false;
-	}
-}
diff --git a/src/main/java/de/jottyfan/minecraft/quickiefabric/init/RegistryManager.java b/src/main/java/de/jottyfan/minecraft/quickiefabric/init/RegistryManager.java
index 20328d2..f1dc2e6 100644
--- a/src/main/java/de/jottyfan/minecraft/quickiefabric/init/RegistryManager.java
+++ b/src/main/java/de/jottyfan/minecraft/quickiefabric/init/RegistryManager.java
@@ -42,6 +42,8 @@ import net.minecraft.item.ItemGroup;
 import net.minecraft.item.ItemStack;
 import net.minecraft.registry.Registries;
 import net.minecraft.registry.Registry;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.tag.TagKey;
 import net.minecraft.screen.ScreenHandlerType;
 import net.minecraft.text.Text;
 import net.minecraft.util.ActionResult;
@@ -290,4 +292,7 @@ public class RegistryManager {
 				|| id.equals(new Identifier("blocks/tall_grass"));
 	}
 
+	public final static void registerTags() {
+		TagKey<Item> BLOCKSTACKER = TagKey.of(RegistryKeys.ITEM, new Identifier(QUICKIEFABRIC, "blockstacker"));
+	}
 }
diff --git a/src/main/resources/assets/quickiefabric/textures/item/salpeter.png b/src/main/resources/assets/quickiefabric/textures/item/salpeter.png
index b1d3597..cd765cc 100644
Binary files a/src/main/resources/assets/quickiefabric/textures/item/salpeter.png and b/src/main/resources/assets/quickiefabric/textures/item/salpeter.png differ
diff --git a/src/main/resources/assets/quickiefabric/textures/item/sulphor.png b/src/main/resources/assets/quickiefabric/textures/item/sulphor.png
index db3ee45..8dc98aa 100644
Binary files a/src/main/resources/assets/quickiefabric/textures/item/sulphor.png and b/src/main/resources/assets/quickiefabric/textures/item/sulphor.png differ
diff --git a/src/main/resources/data/minecraft/tags/blocks/blockstacker.json b/src/main/resources/data/minecraft/tags/blocks/blockstacker.json
new file mode 100644
index 0000000..d23f8b5
--- /dev/null
+++ b/src/main/resources/data/minecraft/tags/blocks/blockstacker.json
@@ -0,0 +1,11 @@
+{
+  "replace": false,
+  "values": [
+    "quickiefabric:blockstackereast",
+    "quickiefabric:blockstackersouth",
+    "quickiefabric:blockstackerwest",
+    "quickiefabric:blockstackernorth",
+    "quickiefabric:blockstackerup",
+    "quickiefabric:blockstackerdown"
+  ]
+}
\ No newline at end of file
diff --git a/src/main/resources/data/quickiefabric/recipes/blockstackerdown.json b/src/main/resources/data/quickiefabric/recipes/blockstacker.json
similarity index 100%
rename from src/main/resources/data/quickiefabric/recipes/blockstackerdown.json
rename to src/main/resources/data/quickiefabric/recipes/blockstacker.json
diff --git a/src/test/java/de/jottyfan/minecraft/quickiefabric/help/TestClassHelper.java b/src/test/java/de/jottyfan/minecraft/quickiefabric/help/TestClassHelper.java
deleted file mode 100644
index 48b893c..0000000
--- a/src/test/java/de/jottyfan/minecraft/quickiefabric/help/TestClassHelper.java
+++ /dev/null
@@ -1,25 +0,0 @@
-package de.jottyfan.minecraft.quickiefabric.help;
-
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
-import java.util.HashMap;
-
-import org.junit.Test;
-
-/**
- *
- * @author jotty
- *
- */
-public class TestClassHelper {
-
-	@Test
-	public void testIsInstanceOf() {
-		assertTrue(ClassHelper.isInstanceOf(new HashMap<String, Integer>().getClass(), "Cloneable"));
-		assertTrue(ClassHelper.isInstanceOf(new HashMap<String, Integer>().getClass(), "Map"));
-		assertTrue(ClassHelper.isInstanceOf(new HashMap<String, Integer>().getClass(), "Serializable"));
-		assertTrue(ClassHelper.isInstanceOf(HashMap.class, "Cloneable"));
-		assertTrue(ClassHelper.isInstanceOf(HashMap.class, "Map"));
-		assertTrue(ClassHelper.isInstanceOf(HashMap.class, "Serializable"));
-	}
-}