GURPS: The Known World
Carneiro was a much-feared barbarian reaver known for his jet-black axe of dwarven make. He was a slayer of innocents, and his disappearance a few years ago was not mourned.
It turned out that he was ambushed by the villagers of Clearwater who gave him up to Akteh the Necromancer. Akteh turned Carneiro into a Zombie of great power.
Carneiro met his end at the hands of Decius Malthus. His axe is now wielded by Corwin.