Archdemon of Unx
Shards of Alara — rare
Creature — Demon
Archdemon of Unx rulings:
2008-10-01: If Archdemon of Unx is the only non-Zombie creature you control when the triggered ability resolves, you’ll have to sacrifice it. You’ll still get a Zombie token.
2008-10-01: If you somehow control no non-Zombie creatures when the triggered ability resolves, you won’t have to sacrifice anything. You’ll still get a Zombie token.