Talk:The Hydra/@comment-70.182.92.21-20130511232615/@comment-5885448-20130512015238

That's been an aspect of the game for a while. At first it was simply a very small chance that zombies would drop a placeable head, then skeletons and creepers were added to the list of heads. Withers were introduced with detatchable heads.

Now you just need a vorpal enchant on something and kill the targets with it. Each strike has a chance of one-hit-kill and those 4 can drop a head.