Cavern of Souls 226/244 (The List Reprints)

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 - $88.50
LP - $70.80
MP - $53.10
HP - $35.40
DMG - $17.70