Polluted Cistern // Dim Oubliette [Duskmourn: House of Horror Commander]

Set: Duskmourn: House of Horror Commander Type: Enchantment — Room // Enchantment Rarity: Rare Cost: {1}{B} // {4}{B} (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.)Polluted CisternWhenever one or more cards are put into your graveyard from your library, each opponent loses 1 life for each card type among those cards.Dim OublietteWhen you unlock this door, mill three cards, then return a creature card from your graveyard to the battlefield.