Duskmourn: House of Horror Commander (DSC) #23, rare
Illustrated by Arthur Yuan
Tournament legal version
Comments on this version (0)Polluted Cistern // Dim Oubliette{1}{B}
Enchantment — Room
Whenever one or more cards are put into your graveyard from your library, each opponent loses 1 life for each card type among those cards. (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.)
Dim Oubliette
Enchantment — Room
When you unlock this door, mill three cards, then return a creature card from your graveyard to the battlefield. (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.)