CinderLoE/src/main/java/com/zivilon/cinder_loe/tileentity/TileEntityShadowTile.java

package com.zivilon.cinder_loe.tileentity;

import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.tileentity.TileEntity;

public class TileEntityShadowTile extends TileEntity {
    public long spawnTime;
    public static long REMOVAL_DELAY_MS = 15000;

    @Override
    public void updateEntity() {
        if (!worldObj.isRemote) {
            if (spawnTime == 0) {
                spawnTime = System.currentTimeMillis();
            }

            long currentTime = System.currentTimeMillis();
            if (currentTime >= spawnTime + REMOVAL_DELAY_MS) {
                worldObj.setBlockToAir(xCoord, yCoord, zCoord);
                worldObj.markBlockForUpdate(xCoord, yCoord, zCoord); // Force the client to update
                worldObj.removeTileEntity(xCoord, yCoord, zCoord); // Clean up the tile entity
            }
        }
    }

    @Override
    public void writeToNBT(NBTTagCompound nbt) {
        super.writeToNBT(nbt);
        nbt.setLong("spawnTime", spawnTime);
    }

    @Override
    public void readFromNBT(NBTTagCompound nbt) {
        super.readFromNBT(nbt);
        spawnTime = nbt.getLong("spawnTime");
    }
}