@Override
    public void onUpdate(ItemStack itemStack, World world, Entity entity, int i, boolean flag) {
        super.onUpdate(itemStack, world, entity, i, flag);

        NBTTagCompound nbtDataCompund = itemStack.getSubCompound("coolDown", true);

        int coolDown = nbtDataCompund.getInteger("coolDown");
        if (coolDown > 0) {
            --coolDown;
            nbtDataCompund.setInteger("coolDown", coolDown);
        }
    }

@Override
    public boolean itemInteractionForEntity(ItemStack itemStack, EntityPlayer entityPlayer, EntityLivingBase entity, EnumHand hand) {

        NBTTagCompound nbtDataCompund = itemStack.getSubCompound("coolDown", true);
        if (nbtDataCompund != null) {
            int coolDown = nbtDataCompund.getInteger("coolDown");

            if (coolDown > 0) {
                return false;
            }

            if (coolDown == 0) {
                if (entity instanceof EntityMob) {
                    if (itemStack.getItemDamage() > 0) {
                        entity.setHealth(0.0F);
                        nbtDataCompund.setInteger("coolDown", ItemConfig.magicStoneCooldown);
                        if (!entity.worldObj.isRemote) {
                            entityPlayer.addChatMessage(new TextComponentString(TextFormatting.GRAY + "Soul Absurbed!"));
                        }
                        itemStack.damageItem(-1, entityPlayer);
                        return true;
                    } else {
                        if (!entity.worldObj.isRemote) {
                            entityPlayer.addChatMessage(new TextComponentString(TextFormatting.GRAY + "The  Magical Stone seems to be full?"));
                            entityPlayer.addChatMessage(new TextComponentString(TextFormatting.GRAY + "It seems to be useless now."));
                            entityPlayer.addChatMessage(new TextComponentString(TextFormatting.GRAY + "I wonder whats inside?"));
                        }
                        return true;
                    }
                } else if (!entity.worldObj.isRemote) {
                    entityPlayer.addChatMessage(new TextComponentString(TextFormatting.GRAY + "Why has this stoped working?"));
                }
            } else {
                entityPlayer.addChatMessage(new TextComponentString(TextFormatting.GRAY + "Why has this stoped working?"));
            }
        }
        return false;
    }