Mutation de biomasse 
Biomass Mutation
Éphémère
Printed (FR)
Éphémère
Les créatures que vous contrôlez ont une force et une endurance de base de X/X jusqu'à la fin du tour.
Oracle text (EN)
Instant
Creatures you control have base power and toughness X/X until end of turn.
Printing details
- Set
- C19 · 187
- Rarity
- Rare
- Language
- FR
- Artist
- Dan Murayama Scott
- Released
- 2019-08-23
- Prices
- – · –
Price history
The trend shows with at least 7 days of history.
- Cardmarket, trend
- CardTrader, Near Mint minimum (FR)
The history starts on October 28, 2026 and grows every day.
Show the data
| Date | Cardmarket, trend | CardTrader, Near Mint minimum (FR) |
|---|---|---|
| October 30, 2026 | €0.15 | €0.60 |
| October 29, 2026 | €0.16 | €0.60 |
| October 28, 2026 | €0.17 | €0.60 |
Prices
| Source | Non-foil | Foil |
|---|---|---|
| Cardmarket | low – trend €0.15 30-day avg €0.19 | low €0.10 trend €0.00 30-day avg – |
| CardTrader (FR) | NM from €0.60 with Zero from €0.60 | NM from – |
| CardTrader (any language) | NM from €0.17 | NM from – |
Cardmarket updated Oct 30, 2026 · CardTrader updated Oct 30, 2026
Buy and look up
Legality
- standard Not legal
- pioneer Legal
- modern Legal
- legacy Legal
- vintage Legal
- commander Legal
- pauper Not legal
- alchemy Not legal
- brawl Not legal
- competitivebrawl Not legal
- duel Legal
- future Not legal
- gladiator Not legal
- historic Not legal
- oathbreaker Legal
- oldschool Not legal
- paupercommander Not legal
- penny Legal
- predh Not legal
- premodern Not legal
- standardbrawl Not legal
- timeless Not legal
- tlr Legal
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.