Archdemon of Unx is a rare Creature — Demon card from Shards of Alara (ALA), collector number 64. Current market price: $0.17 (foil $1.00), TCGplayer market prices via Scryfall.
Flying, trample At the beginning of your upkeep, sacrifice a non-Zombie creature, then create a 2/2 black Zombie creature token.