diff --git a/build.gradle b/build.gradle
index 118cb0a..feb9f35 100644
--- a/build.gradle
+++ b/build.gradle
@@ -31,7 +31,8 @@ dependencies {
             "net.md-5:bungeecord-api:1.16-R0.4-SNAPSHOT",
             "io.github.waterfallmc:waterfall-api:1.16-R0.4-SNAPSHOT",
             "me.clip:placeholderapi:2.10.9",
-            files("libs/spigot-1.16.5.jar")
+            files("libs/spigot-1.16.5.jar"),
+            files("libs/spigot-1.16.4.jar")
     ].each {s ->
         compileOnly s
     }
diff --git a/src/main/java/io/github/simplexdev/simplexcore/structures/Structure.java b/src/main/java/io/github/simplexdev/simplexcore/structures/Structure.java
index 2f95837..07c07df 100644
--- a/src/main/java/io/github/simplexdev/simplexcore/structures/Structure.java
+++ b/src/main/java/io/github/simplexdev/simplexcore/structures/Structure.java
@@ -1,5 +1,5 @@
 package io.github.simplexdev.simplexcore.structures;
 
 public class Structure {
-    // TODO: Write this file to parse schematics.
+    // TODO: Write this
 }
diff --git a/src/main/java/io/github/simplexdev/simplexcore/structures/block/NBTBlock.java b/src/main/java/io/github/simplexdev/simplexcore/structures/block/NBTBlock.java
index 3a9f838..3e3e975 100644
--- a/src/main/java/io/github/simplexdev/simplexcore/structures/block/NBTBlock.java
+++ b/src/main/java/io/github/simplexdev/simplexcore/structures/block/NBTBlock.java
@@ -1,15 +1,19 @@
 package io.github.simplexdev.simplexcore.structures.block;
 
-import net.minecraft.server.v1_16_R3.NBTTagCompound;
+import io.github.simplexdev.simplexcore.structures.exception.InvalidSchematic;
+
+import java.util.Vector;
 
 public abstract class NBTBlock {
-    private final NBTTagCompound nbttag;
+    private  Object nbttag;
 
-    public NBTBlock(NBTTagCompound nbttag){
-        this.nbttag = nbttag;
-    }
-
-    public NBTTagCompound getNbttag(){
+    public Object getNbttag(){
         return nbttag;
     }
+
+    public abstract Vector getOffset() throws InvalidSchematic;
+
+    public abstract boolean isEmpty();
+
+
 }
diff --git a/src/main/java/io/github/simplexdev/simplexcore/structures/exception/InvalidSchematic.java b/src/main/java/io/github/simplexdev/simplexcore/structures/exception/InvalidSchematic.java
new file mode 100644
index 0000000..8e6c6bd
--- /dev/null
+++ b/src/main/java/io/github/simplexdev/simplexcore/structures/exception/InvalidSchematic.java
@@ -0,0 +1,9 @@
+package io.github.simplexdev.simplexcore.structures.exception;
+
+public class InvalidSchematic extends Exception{
+
+    public InvalidSchematic(String msg)
+    {
+        super(msg);
+    }
+}