Kasabian

Kasabian was in the group of magic practitioners that sent Stark to Hell before Sandman Slim, Book 1 starts. After Stark returns from Hell, he tracks down Kasabian and cuts off his head with a magical black knife. This separates Kasabian's head from his body but doesn't kill him. Stark later gives Kasabian a creaky body put together from cannibalized parts of Hellhounds, mechanical war-dogs from Hell.