Biomass Mutation [Gatecrash] Swamp all attacking creatures with flanking

all attacking creatures with flanking get +1/+1 until end of turn

Set: Kaladesh Prerelease Promos Type: Creature — Elf Artificer Druid Rarity: Rare Cost: {2}{G} Whenever a land enters the battlefield under your control

or Effect Monster Card to destroy your Trap Card(s)

Set: League & Championship Cards Type: Darkness Rarity: Promo

Biomass Mutation [Gatecrash] Swamp all attacking creatures with flankingSet: 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