Biomass Mutation
Instant
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
- Gatecrash (GTC #213)
- Rarity
- Rare
- Mana value
- 2
- Released
- 2013-02-01
- Artist
- Dan Murayama Scott
- EDHREC rank
- #4,852
- Colour identity
- Finishes
- Nonfoil, Foil
- Served from
- Local database
Commander bracket
Derived from card traits, not a ruling — bracket rules turn on how a deck intends to use a card. Bracket rules
EDHREC
Combos
Not part of any combo on Commander Spellbook.
Format legality
Rulings
- 2013-01-24
Biomass Mutation overwrites any effects that set the power and/or toughness of a creature you control to a specific value. Effects that modify power and/or toughness but don't set them to a specific value (like the one created by Giant Growth), power/toughness changes from counters, and effects that switch a creature's power and toughness will continue to apply. For example, say you control a 1/1 creature that's getting +4/+2 from an Aura, has a +1/+1 counter on it, and is affected by an effect that switches its power and toughness. This creature is 4/6. If you cast Biomass Mutation with X equal to 4, the creature would become 7/9 (4/4, +4/+2 from the Aura, +1/+1 from the counter, then switch power and toughness).
- 2013-01-24
Choosing 0 as the value for X will likely cause creatures you control to become 0/0 and be put into the graveyard.