Solved NullPointerException when spawning custom MagmaCube

Hello, I have recently started work on a custom bosses plugin. I created a custom Zombie the other day with no problems, however now after creating a custom magma cube I get a NPE whenever spawning it in with the spawn egg

My Main / Listener:

Code:

package com.mclaurence.CustomBoss;

import static org.bukkit.ChatColor.GOLD;
import static org.bukkit.ChatColor.GREEN;
import net.minecraft.server.v1_7_R4.EntityMagmaCube;
import net.minecraft.server.v1_7_R4.NBTTagCompound;
import net.minecraft.server.v1_7_R4.NBTTagList;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.craftbukkit.v1_7_R4.inventory.CraftItemStack;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.MagmaCube;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.entity.EntityDeathEvent;
import org.bukkit.event.entity.EntitySpawnEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;

import com.mclaurence.CustomBoss.Bosses.CustomEntityMagma;

public class Main extends JavaPlugin implements Listener{
   
    public static ItemStack Test;
   
    public void onEnable(){
       
        NMSUtil nmsu = new NMSUtil();
        nmsu.registerEntity("Test", 62, EntityMagmaCube.class, CustomEntityMagma.class);
       
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
       
        Test = new ItemStack(Material.MONSTER_EGG, 1, (short) 62);
        ItemMeta TestMeta = Test.getItemMeta();
       
        TestMeta.setDisplayName(GREEN + "Test");
        Test.setItemMeta(TestMeta);
       
        Test = addGlow(Test);
    }
   
    public void onDisable(){
       
    }
   
    @EventHandler
    public void onPlayerSpawnBoss(PlayerInteractEvent event){
        if(event.getAction() == Action.RIGHT_CLICK_BLOCK){
           
            if(event.getPlayer().getItemInHand() == Test && event.getPlayer().getItemInHand().getItemMeta().equals(Test.getItemMeta())){
               
            }
        }
    }
   
    @EventHandler
    public void BossDeath(EntityDeathEvent event){
        if(event.getEntity().getKiller() instanceof Player){
           
            if(event.getEntity() instanceof MagmaCube){
               
                if(event.getEntity().getCustomName() == null){
                    return;
                }
                if(event.getEntity().getCustomName().equalsIgnoreCase(GREEN + "Test")){
                   
                    event.getEntity().getWorld().createExplosion(event.getEntity().getLocation(), 2.0F);
                   
                    Bukkit.broadcastMessage("" + event.getEntity().getKiller().getDisplayName() + " has defeated " + GOLD + "The Test");
                    }
                }
            }
        }
   
    @EventHandler
    public void BossSpawn(EntitySpawnEvent event){
        if(event.getEntity() instanceof MagmaCube){
           
            if(((LivingEntity) event.getEntity()).getCustomName() == null){
                return;
            }
           
            if(((LivingEntity) event.getEntity()).getCustomName().equalsIgnoreCase(GREEN + "Test")){
               
                getServer().getWorld(event.getEntity().getWorld().getName()).strikeLightning(event.getEntity().getLocation());
                }
            }
        }
   
    public static ItemStack addGlow(ItemStack itemstack){
        net.minecraft.server.v1_7_R4.ItemStack nmsStack = CraftItemStack.asNMSCopy(itemstack);
        NBTTagCompound tag = null;
       
        if(!nmsStack.hasTag()){
            tag = new NBTTagCompound();
            nmsStack.setTag(tag);
        }
        if(tag == null) tag = nmsStack.getTag();
       
        NBTTagList enchantment = new NBTTagList();
        tag.set("ench", enchantment);
        nmsStack.setTag(tag);
        return CraftItemStack.asCraftMirror(nmsStack);
    }
   
    @EventHandler
    public void onJoin(PlayerJoinEvent event){
        if(event.getPlayer().isOp()){
            event.getPlayer().getInventory().addItem(Test);
        }
    }
}

My Custom MagmaCube class:

Code:

package com.mclaurence.CustomBoss.Bosses;

import net.minecraft.server.v1_7_R4.EntityMagmaCube;
import net.minecraft.server.v1_7_R4.GenericAttributes;
import net.minecraft.server.v1_7_R4.Item;
import net.minecraft.server.v1_7_R4.World;

import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.craftbukkit.v1_7_R4.CraftWorld;
import org.bukkit.craftbukkit.v1_7_R4.entity.CraftLivingEntity;
import org.bukkit.entity.MagmaCube;
import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;

public class CustomEntityMagma extends EntityMagmaCube{
   
    public CustomEntityMagma(World world){
        super(world);
    }
   
    @Override
    protected void aD(){
        super.aD();
       
        this.setCustomName(ChatColor.GREEN + "Test");
        this.getAttributeInstance(GenericAttributes.e).setValue(1.0D); //5X damage than normal mob
        this.getAttributeInstance(GenericAttributes.maxHealth).setValue(2000.0D); //50 Hearts
        this.getAttributeInstance(GenericAttributes.d).setValue(1.0D); //Set speed
        this.setSize(1000);    //Make the MagmaCube big
    }
   
    protected Item getLoot(){
        return null;
    }
   
    public static MagmaCube spawn(Location loc){
        World mcWorld = (World) ((CraftWorld) loc.getWorld()).getHandle();
        final CustomEntityMagma customEntity = new CustomEntityMagma(mcWorld);
       
        customEntity.setLocation(loc.getX(), loc.getY(), loc.getZ(), loc.getYaw(), loc.getPitch());
        ((CraftLivingEntity) customEntity.getBukkitEntity()).setRemoveWhenFarAway(false);
        mcWorld.addEntity(customEntity, SpawnReason.CUSTOM);
        return (MagmaCube) customEntity.getBukkitEntity();
    }
}

The Error Report:

Code:

[17:19:01 WARN]: Skipping Entity with id 62
[17:19:01 WARN]: java.lang.reflect.InvocationTargetException
[17:19:01 WARN]:        at sun.reflect.GeneratedConstructorAccessor70.newInstanc
e(Unknown Source)
[17:19:01 WARN]:        at sun.reflect.DelegatingConstructorAccessorImpl.newInst
ance(Unknown Source)
[17:19:01 WARN]:        at java.lang.reflect.Constructor.newInstance(Unknown Sou
rce)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.EntityTypes.a(SourceFile
:166)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.ItemMonsterEgg.spawnCrea
ture(ItemMonsterEgg.java:108)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.ItemMonsterEgg.a(ItemMon
sterEgg.java:97)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.ItemMonsterEgg.interactW
ith(ItemMonsterEgg.java:37)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.ItemStack.placeItem(Item
Stack.java:102)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.PlayerInteractManager.in
teract(PlayerInteractManager.java:398)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.PlayerConnection.a(Playe
rConnection.java:662)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.PacketPlayInBlockPlace.a
(PacketPlayInBlockPlace.java:50)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.PacketPlayInBlockPlace.h
andle(PacketPlayInBlockPlace.java:86)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.NetworkManager.a(Network
Manager.java:186)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.ServerConnection.c(Serve
rConnection.java:81)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.v(Minecr
aftServer.java:734)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.DedicatedServer.v(Dedica
tedServer.java:289)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.u(Minecr
aftServer.java:584)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.run(Mine
craftServer.java:490)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.ThreadServerApplication.
run(SourceFile:628)
[17:19:01 WARN]: Caused by: java.lang.NullPointerException
[17:19:01 WARN]:        at com.mclaurence.CustomBoss.Bosses.CustomEntityMagma.aD
(CustomEntityMagma.java:26)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.EntityLiving.<init>(Enti
tyLiving.java:97)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.EntityInsentient.<init>(
EntityInsentient.java:39)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.EntitySlime.<init>(Entit
ySlime.java:19)
[17:19:01 WARN]:        at net.minecraft.server.v1_7_R4.EntityMagmaCube.<init>(S
ourceFile:10)
[17:19:01 WARN]:        at com.mclaurence.CustomBoss.Bosses.CustomEntityMagma.<i
nit>(CustomEntityMagma.java:18)
[17:19:01 WARN]:        ... 19 more
[17:19:01 WARN]: Skipping Entity with id 62
>

I do also have a NMSUtil class however that does not directly effect my Custom Magma so I wont upload it.
Any help is appreciated greatly
- Thanks