Power Leak [Alpha Edition] GG08 {1}: Mutavault becomes a 2/2

{1}: Mutavault becomes a 2/2 creature with all creature types until end of turn

Set: HeartGold & SoulSilver: Triumphant Type: Metal Rarity: Rare Retreat cost: Colorless

Set: XY: Black Star Promos Type: Water Rarity: Promo Retreat cost: Colorless

sacrifice City of Traitors

or sorcery spell

Power Leak [Alpha Edition] GG08 {1}: Mutavault becomes a 2/2Set: Alpha Edition Type: Enchantment Aura Rarity: Common Cost: {1}{U} Enchant enchantment At the beginning of the upkeep of enchanted enchantment's controller, that player may pay any amount of mana. Power Leak deals 2 damage to that player. Prevent X of that damage, where X is the amount of mana that player paid this way.