Combat Celebrant [Amonkhet Prerelease Promos] Duels of the Planeswalkers Promos 2012 and white at the beginning

and white at the beginning of your next upkeep

destroy it

If that mana is spent on an instant or sorcery spell

As Steam Vents enters the battlefield

You may reveal that card

Combat Celebrant [Amonkhet Prerelease Promos] Duels of the Planeswalkers Promos 2012 and white at the beginningSet: Amonkhet Prerelease Promos Type: Creature Human Warrior Rarity: Mythic Cost: {2}{R} If Combat Celebrant hasn't been exerted this turn, you may exert it as it attacks. When you do, untap all other creatures you control and after this phase, there is an additional combat phase. (An exerted creature won't untap during your next untap step.)