Polluted Cistern // Dim Oubliette

Description

Polluted Cistern // Dim Oubliette is a black Room enchantment (collector number 23, rare) from Duskmourn: House of Horror Commander with two doors you may cast. The front door drains each opponent whenever you put cards from your library into your graveyard based on the card types milled. The back door unlock effect mills three cards and returns a creature card from your graveyard to the battlefield when you unlock it.