and he is the rarest enemy in the binding of Isaac Repentance. He basically has a 0% chance of spawning, so good luck with that. He has a base health of 80, which is high for the floor he's on. He doesn't even do anything, and after a few seconds, he flushes himself away anyway. If you somehow die to Henry, he doesn't even have a drawing in the death screen because the devs didn't think you'd be stupid enough to die by him.
SPAWN CONDITIONS: Has to be in a small dead end room facing south. Can only appear in the dross floor. Has to spawn in its room layout ONLY. You have to be lucky enough. Credit to whoever made the binding of Isaac (I forgot his name lol Edmond something.)