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Cavern of Souls (Borderless) / Double Masters 2022: Extras

Expansion: Double Masters 2022: Extras
Rarity: Mythic Rare
Type: Land
As Cavern of Souls enters the battlefield choose a creature type.
to your mana pool.
Add one mana of any color to your mana pool. Spend this mana only to cast a creature spell of the chosen type and that spell cant be countered.