Biomass Mutation [Gatecrash]Set: Gatecrash Type: Instant Rarity: Rare Cost: {X}{G U}{G U} Creatures you control have base power and toughness X X until end of turn. "A regression to ancient forms? A glimpse of future evolutions? Or a fleeting alteration of the present?" Vorel of the Hull Clade

Set: Black & White: Emerging Powers Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

At end of combat

Set: Classic Sixth Edition Type: Instant Rarity: Common Cost: {G} Untap all creatures you control

Set: Unlimited Edition Type: Instant Rarity: Common Cost: {W} Choose one —

"A thankless job

Set: Exodus Type: Enchantment Rarity: Rare Cost: {3}{R} Whenever a creature enters the battlefield

{T}: Choose a creature at random that attacked this turn

Sacrifice another creature: Create X 2/2 black Zombie creature tokens

Those players exchange control of those creatures

they may cast a spell from among other cards exiled with Knowledge Pool without paying its mana cost

Set: Torment Type: Creature — Human Barbarian Rarity: Rare Cost: {1}{R}{R} First strike

Set: Magic 2015 Tokens Type: Emblem — Ajani Rarity: Common If a source would deal damage to you or a planeswalker you control