Oracletext<em>(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.)</em>
<br><strong>Polluted Cistern</strong>
<br>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.
<br><strong>Dim Oubliette</strong>
<br>When you unlock this door, mill three cards, then return a creature card from your graveyard to the battlefield.
