Description
| Set: | Ultimate Masters |
| Type: | Land |
| Rarity: | Mythic |
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.

![Cavern of Souls [Ultimate Masters]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/cavern-souls-ultimate-masters.webp)
![Underworld Dreams [Magic 2010]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/underworld-dreams-magic-2010.webp)
![Living Artifact [Beta Edition]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/living-artifact-beta-edition.webp)
![Junun Efreet [Arabian Nights]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/junun-efreet-arabian-nights.webp)
![Swords to Plowshares [Fourth Edition]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/swords-to-plowshares-fourth-edition.webp)
![Shoe Tree (Alternate Foil) [Unhinged]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/shoe-tree-alternate-foil-unhinged.webp)
![Nissa, Vastwood Seer // Nissa, Sage Animist [Magic Origins Prerelease Promos]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/nissa-vastwood-seer-nissa-sage-animist-magic-origins-prerelease-promos.webp)
![Progenitus [From the Vault: Legends]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/progenitus-from-vault-legends.webp)
![Mammoth Umbra [Planechase Anthology]](https://www.cardgametoponline.com/wp-content/uploads/2026/07/mammoth-umbra-planechase-anthology.webp)