Polluted Cistern // Dim Oubliette DSC 0023 · rare

Polluted Cistern · {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 · {4}{B} · 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.)