A kind of giant mutant lamprey, so far nameless (Bathory? Echo?), that latch onto the player character and drain health away. Nothing malicious, they just think you're the one.
The Hunting Wyrm, a planarian based mutant that can regenerate health if you don't defeat it quickly enough. Also, it can gain the memories of those it eats, which hardly factors in the game at all. Or does it!?
