Biomass Mutation
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Magic: The Gathering
Mana cost
FalloutPIP · #475
- Card type
- Instant
- Rarity
- Rare
- Indicative price
- 0.24 € · ★ 0.36 € · 0.36 $ · ★ 0.41 $
- Mana value
- 2
- Colour
- Blue Green
Card text
Creatures you control have base power and toughness X/X until end of turn.
Format legality
- CommanderLegal
- DuelLegal
- LegacyLegal
- ModernLegal
- OathbreakerLegal
- PennyLegal
- PioneerLegal
- VintageLegal
Legalities follow the imported catalogue; check format rules before a tournament.
Data imported on 2026-10-06 (UTC).
Indicative Scryfall prices, updated daily. ★: foil; ★ E: etched foil. EUR and USD represent different markets.
Printing information
- Illustrator
- Nicholas Gregory
- Card language
- English
- Release date
- 2024-03-08
Flavour text
Vault 87's Evolutionary Experimentation Program exposed subjects to an airborne version of FEV. Rapid physical enhancements accompanied sharp mental regression, and the oldest mutants would become almost feral.
Rulings
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).
Choosing 0 as the value for X will likely cause creatures you control to become 0/0 and be put into the graveyard.
