Cavern of Souls
Cavern of Souls
As Cavern of Souls enters the battlefield, choose a creature type.
{T}: Add {C} to your mana pool.
{T}: Add one mana of any color to your mana pool. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.
Latest set: [MM3] Modern Masters 2017 Edition ( M · #232 )