So I just finished getting one of my pawns out of the grey rooms in the warped obelisk and an idea occurred to me after seeing all the dead bodies in there. What if there was an immortal in there who has been trapped in there for decades with only his natural regeneration to keep them alive. They would be hostile to anyone they see since they have been driven mad after getting stuck in there. But if you capture them you can bring them back with you and recruit them after you deal with their insanity.