Cavern of Souls [Avacyn Restored] Dinosaur Set: Betrayers of Kamigawa Type:

Set: Betrayers of Kamigawa Type: Instant — Arcane Rarity: Rare Cost: {X}{U}{U} You may exile a blue card with mana value X from your hand rather than pay this spell's mana cost

Set: Beta Edition Type: Artifact Rarity: Uncommon Cost: {1} Whenever a player casts a green spell

not its controller

Even after a false god tore the magic from Dominaria

" —Ertai

Cavern of Souls [Avacyn Restored] Dinosaur Set: Betrayers of Kamigawa Type:Set: Avacyn Restored Type: Land Rarity: Rare 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.