The Lost Caverns of Ixalan

Cavern of Souls

As Cavern of Souls 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.

The Lost Caverns of Ixalan Promos

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.

Tales of Middle-earth Commander

As Paths of the Dead 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.

Magic Online Promos

Double Masters 2022

The List

Zendikar Rising Expeditions

Ultimate Masters

Ultimate Box Topper

Modern Masters 2017

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.

Avacyn Restored

As Cavern of Souls enters the battlefield, choose a creature type.
{T}: Add {1} 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.