Cavern of Souls [Ultimate Masters]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.

• 1 Elvish Skysweeper

• 1 Drown in Filth

• 1 Skarrgan Skybreaker

Remove a charge counter from Druids' Repository: Add one mana of any color

{U}: Morphling gains flying until end of turn

• 2 Aether Revolt booster packs

• 1 Exclusion Mage

Cutting-edge mortal technology complements—and threatens—the ancient spirits that still roam the plane

{T}: Regenerate target Elephant

Hardened in the Forge

the Walking Grave

Artful Provocateur