As this land enters, choose a creature type. : Add . : 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.
Cavern of Souls (0345) (Borderless) (LCI-345) - The Lost Caverns of Ixalan (Borderless) Foil
As this land enters, choose a creature type. : Add . : 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.
: Add 
.
