Biomass Mutation
Biomass Mutation: Instant, Secrets of Strixhaven Commander. Creatures you control have base power and toughness X/X until end of turn. On Mana Grove.
- Mana cost
- {X}{G/U}{G/U}
- Mana value
- 2
- Type
- Instant
- Colour identity
- Blue and green (UG)
- Rarity
- Rare
- Set
- Secrets of Strixhaven Commander (SOC)
- Released
- 2026-04-24
- Collector number
- 297
- Artist
- Dan Murayama Scott
- Commander rank
- 4,855 (by how often it appears in Commander decks)
Build around this card with Grover
About Biomass Mutation
Biomass Mutation is a Magic: The Gathering card, a rare blue and green instant from Secrets of Strixhaven Commander (SOC), a Commander product released in April 2026. It is collector number 297 in that set, with art by Dan Murayama Scott. It costs {X}{G/U}{G/U} to cast, for a mana value of 2. Its colour identity is blue and green. It is legal in Pioneer, Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker and Penny Dreadful. It has been printed in 7 sets, from Gatecrash (2013) to Secrets of Strixhaven Commander (2026). The latest aggregated market price for this printing is $0.26 (normal finish, as of 2026-11-03).
Card text
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
Market price
Latest aggregated market price for the normal finish of this printing: $0.26 (as of 2026-11-03).
The figure covers this printing only; other printings carry their own price on their own page.
Format legality
Legality of Biomass Mutation by format. Formats in which it is not legal are not listed.
| Pioneer | Legal |
|---|---|
| Modern | Legal |
| Legacy | Legal |
| Vintage | Legal |
| Commander | Legal |
| Duel Commander | Legal |
| Oathbreaker | Legal |
| Penny Dreadful | Legal |
Other printings of Biomass Mutation
Biomass Mutation has been printed in 7 sets. The other printings are listed newest first, with the rarity and release year of each.
| Printing | Rarity | Year |
|---|---|---|
| Duskmourn: House of Horror Commander (DSC) #214 | Rare | 2024 |
| Fallout (PIP) #1003 | Rare | 2024 |
| Fallout (PIP) #212 | Rare | 2024 |
| Fallout (PIP) #475 | Rare | 2024 |
| Fallout (PIP) #740 | Rare | 2024 |
| The List (PLST) #GTC-213 | Rare | 2021 |
| Commander 2021 (C21) #209 | Rare | 2021 |
| Commander 2019 (C19) #187 | Rare | 2019 |
| Gatecrash (GTC) #213 | Rare | 2013 |
Official rulings
Two official rulings apply to Biomass Mutation, newest first.
- 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.
Similar cards
Other instant cards with a blue and green colour identity, ranked by how often they appear in Commander decks.
In these precons
Biomass Mutation is in the decklist of these preconstructed Commander decks.