Cavern of Souls (Topper) [Ultimate Masters Box Topper] Siren Set: Lorwyn Type: Creature —

Set: Lorwyn Type: Creature — Elemental Shaman Rarity: Uncommon Cost: {R} When Flamekin Harbinger enters the battlefield

Set: Exodus Type: Enchantment Rarity: Rare Cost: {G} At the beginning of your end step

Birgi's horn never runs dry

counter that spell or ability unless its controller pays {2}

Set: The Lost Caverns of Ixalan Type: Legendary Creature — Elder Dinosaur Rarity: Mythic Cost: {5}{G}{G}{G} Trample

Cavern of Souls (Topper) [Ultimate Masters Box Topper] Siren Set: Lorwyn Type: Creature —Set: Ultimate Masters Box Topper 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.