Cavern of Souls [Ultimate Masters] Mutant {T}: Add {C}{C}{C}

{T}: Add {C}{C}{C}

Set: Ultimate Masters Type: Artifact Rarity: Rare Cost: {3} Sacrifice a creature: Add one mana of any color

target instant or sorcery card in your graveyard gains flashback until end of turn

Set: Ultimate Box Topper Type: Legendary Creature — Kithkin Advisor Rarity: Mythic Cost: {G}{W} Noncreature spells with converted mana cost 4 or greater can't be cast

the hate he receives in return withers his body a little more

Cavern of Souls [Ultimate Masters] Mutant {T}: Add {C}{C}{C}Set: Ultimate Masters Type: Land Rarity: Mythic Cost: 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.