Polluted Cistern // Dim Oubliette

Polluted Cistern // Dim Oubliette (23) is a Black Enchantment — Room // Enchantment — Room from Commander: Duskmourn: House of Horror (DSC). It costs {1}{B} // {4}{B} and has mana value 7. It is printed at Rare rarity. The one keyword in its text is Mill. It is legal in Legacy, Vintage, Commander and Oathbreaker.

Commander: Duskmourn: House of Horror is a Commander product, released September 2024.

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.) // 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.)