That's.. actually pretty amazing. Renewable coal. And wither skeleton heads. And bones. Yay for us!I'd also check to make sure nobody chunk loaded a nether fortress. I may have done something this dumb on our server. There may have been wither skeletons suffocating in the walls because there were so many. There may have been over 9000 wither skeleton skull entities dropped on the ground and exponentially more bones and coal. There was definitely lag.