Klauth, Unrivaled Ancient

Set: Commander: Adventures in the Forgotten Realms (#50)

Rarity: Mythic

Type: Legendary Creature — Dragon

Mana Cost: {5}{R}{G}

Colors: Green, Red

P/T: 4/4

Flying, haste Whenever Klauth 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.