Cavern of Souls (Borderless Alternate Art) [Double Masters 2022] Landmark Spend this mana only to

Spend this mana only to cast your commander

Set: Legends Type: Instant Rarity: Rare Cost: {U}{U} Tap target creature

its owner shuffles his or her graveyard into his or her library

Set: Commander 2017 Oversized Type: Legendary Creature — Dragon Avatar Rarity: Mythic Cost: {4}{W}{U}{B}{R}{G} Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield

but do not be enticed

Cavern of Souls (Borderless Alternate Art) [Double Masters 2022] Landmark Spend this mana only toSet: Double Masters 2022 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.