Cavern of Souls [Avacyn Restored] Moonfolk Monk that player sacrifices a permanent

that player sacrifices a permanent unless they pay {1}

Set: Judgment Type: Sorcery Rarity: Uncommon Cost: {B} Choose a nonland card name

Set: Junior Super Series Type: Land Rarity: Rare At the beginning of the end step

Set: Modern Masters 2017 Type: Land Rarity: Mythic As Cavern of Souls enters the battlefield

defending player sacrifices four permanents

Cavern of Souls [Avacyn Restored] Moonfolk Monk that player sacrifices a permanentSet: Avacyn Restored Type: Land Rarity: Rare As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.