Cavern of Souls
- Color: Colorless
- Type: Land
- Rarity: Rare
- Set: Avacyn Restored
As Cavern of Souls enters the battlefield, choose a creature type.
[t]: Add [1] to your mana pool.
[t]: Add one mana of any color to your mana pool. Spend this mana only to cast creature spells of the chosen creature type. If this mana is spent on a spell, that spell can’t be countered.
