I recognize that one, shilsen. Did you originally post that one to the +1001 Mournland Horrors thread?
New one: he gains an affinity with bugs. Flies buzz around him, cockroaches follow in his wake, and spiders hate him with a passion. Non-arachnid vermin won't attack him without being attacked first, and all spiders will attack him to the exclusion of all else. He can't talk to them, and he can't command them, they just like him for some reason.
If he somehow communicates with them through magic, they'll say he's a bug like them. His type is still humanoid.