Klauth, Unrivaled Ancient (Extended Art) (320) [Commander: Adventures in the Forgotten Realms]Rarity: M #: 320 Creature Type or Sub Type: Legendary Creature Dragon P: 4 T: 4 Rules Text Contains: Flying, haste Whenever Klauth, Unrivaled Ancient attacks, add X mana in any combination of colors, where X is the total power of attacking creatures. Spend this mana only to cast spells. Until end of turn, you don't lose this mana as steps and phases end. Set: Commander: Adventures in the Forgotten Realms Number: 320