Defiled Crypt // Cadaver Lab (Duskmourn: House of Horror 91) - Uncommon Magic: The Gathering Card

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)Whenever one or more cards leave your graveyard, create a 2/2 black Horror enchantment creature token. This ability triggers only once each turn.