Cavern of Souls 320/331 (Double Masters 2022)

As this land enters, 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.

NM - $98.70
LP - $79.00
MP - $59.20
HP - $39.50
DMG - $19.80