Name: Dim Oubliette Cost: 4B CMC: 7 Color: B CID: B Type: Enchantment -- Room Rules Text: 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.) [This is half of the split card Polluted Cistern // Dim Oubliette.] Set/Rarity: Duskmourn: House of Horror Commander rare Legality: Legal in duel, Legal in vintage, Legal in legacy, Legal in commander, Legal in oathbreaker Price: $0.42