Cavern of Souls (Avacyn Restored)

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 - $87.50
LP - $70.00
MP - $52.50
HP - $35.00
DMG - $17.50