Kotis, the Fangkeeper [Tarkir: Dragonstorm Promos]

Set: Tarkir: Dragonstorm Promos Type: Legendary Creature — Zombie Warrior Rarity: Rare Cost: {1}{B}{G}{U} IndestructibleWhenever Kotis deals combat damage to a player, exile the top X cards of their library, where X is the amount of damage dealt. You may cast any number of spells with mana value X or less from among them without paying their mana costs.