As Cavern of Souls enters the battlefield, 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-Mint - $41.50
Lightly Played - $39.50
Moderately Played - $37.40
Heavily Played - $33.20
Damaged - $27.00
NM-Mint Non English - $41.50
Lightly Played Non English - $39.50
Moderately Played Non English - $37.40
Heavily Played Non English - $33.20
Damaged Non English - $27.00