Rules Text Contains:(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 Cistern 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.
Dim Oubliette When you unlock this door, mill three cards, then return a creature card from your graveyard to the battlefield.
![Polluted Cistern // Dim Oubliette [DSC - 23] - Cartes Sportives Rive Sud](http://cartessportivesrivesud.com/cdn/shop/files/polluted-cistern-dim-oubliette-dsc-23-magic-the-gathering-singles-8213131-207417_{width}x.jpg?v=1753649828)
![Polluted Cistern // Dim Oubliette [DSC - 23] - Cartes Sportives Rive Sud](http://cartessportivesrivesud.com/cdn/shop/files/polluted-cistern-dim-oubliette-dsc-23-magic-the-gathering-singles-8213131-207417_1024x.jpg?v=1753649828)