Brain Dog

Zadina recovered one of these from the Tower of Mist on 04-22-102 PH. He found it in the basement and it consumed the brain of one of his men, teleported into his man, and they were forced to kill the man and then the brain dog as it crawled from the man's corpse. It looks like a dog-sized brain with four reptilian feet. He relates they hacked it two or three times and shot four times with a crossbow (about 30 points of damage with average rolls).