Cavern of Souls (0410f) (Borderless) [The Lost Caverns of Ixalan] Standardbrawl I will not rest until

I will not rest until I've atoned for them

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Set: Duskmourn: House of Horror Type: Enchantment Creature — Sheep Glimmer Rarity: Rare Cost: {1}{W}{W} Lifelink

then proliferate again

Set: Modern Horizons 3 Commander Type: Legendary Creature — Eldrazi Rarity: Mythic Cost: {C/W}{C/U}{C/B}{C/R}{C/G} Devoid (This card has no color

Cavern of Souls (0410f) (Borderless) [The Lost Caverns of Ixalan] Standardbrawl I will not rest untilSet: The Lost Caverns of Ixalan Type: Land Rarity: Mythic 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.