Polluted Cistern // Dim Oubliette [Duskmourn: House of Horror Commander] Horse Mount Players will put their best

Players will put their best paws forward

After that turn

Set: The Lost Caverns of Ixalan Commander Type: Enchantment Rarity: Rare Cost: {2}{B} At the beginning of your precombat main phase

Set: Commander 2016 Type: Sorcery Rarity: Rare Cost: {6}{B} Choose target player and another target player

When that mana is spent to cast a red instant or sorcery spell

Polluted Cistern // Dim Oubliette [Duskmourn: House of Horror Commander] Horse Mount Players will put their bestSet: Duskmourn: House of Horror Commander Type: Enchantment Room Enchantment Rarity: Rare Cost: {1}{B} {4}{B} (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