He spawns in the crumbled building nearest the razorfiend caves, at -1142, 763. He does not summon. He can drop the Honorary Faceplate, which I've gotten twice in dozens of kills and the Ornate Horn of the Valorous, which I have not looted yet (approximately 30 footman kills so far).
This guy is supposed to drop the ornate horn of the valorous (nice). I have heard he is a rare spawn in the undead camp NW of graveyard. There are 4 undead camps in that general area so I'd like to know if it is a specific one or any of the 4?