Cavern of Souls (Promo Pack) [The Lost Caverns of Ixalan Promos] Transformers At the beginning of each

At the beginning of each player's upkeep

Set: Tempest Type: Creature — Dog Rarity: Rare Cost: {3}{G} When Mongrel Pack dies during combat

and Rofellos to hone their spellcasting in tandem with more physical disciplines so that both would be improved

Set: Zendikar Type: Instant — Trap Rarity: Mythic Cost: {2}{U}{U} If an opponent cast three or more spells this turn

Nightmare's power and toughness are each equal to the number of Swamps you control

Cavern of Souls (Promo Pack) [The Lost Caverns of Ixalan Promos] Transformers At the beginning of eachSet: The Lost Caverns of Ixalan Promos 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.