Acererak the Archlich [Dungeons & Dragons: Adventures in the Forgotten Realms Prerelease Promos]

When “Acererak” enters the battlefield, if you have not completed the dungeon Tomb of Annihilation, return “Acererak” to its owner’s hand and venture into the dungeon.

Whenever “Acererak” attacks, for each opponent, you create a 2/2 black Zombie creature token unless that player sacrifices a creature.