Biomass Mutation
Tracked across real Commander games played through TurnZero HQ.
What it does
Creatures you control have base power and toughness X/X until end of turn.
Rulings
2 official rulings, in the order Wizards published them.
- 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.
Rulings are Wizards of the Coast's own, mirrored from Scryfall and refreshed nightly.
In the 99
Every deck whose current list includes Biomass Mutation, whatever its commander.
Most played under
| Commander | Decks | Games | Win rate |
|---|---|---|---|
| Zimone, Infinite Analyst | 4 | 0 | — |
| the wise mothman | 3 | 0 | — |
| Adrix and Nev, Twincasters | 1 | 0 | — |
| Kadena, Slinking Sorcerer | 1 | 0 | — |
| Zimone, Mystery Unraveler | 1 | 0 | — |
Colors it shows up in
- Simic 6 decks
- Sultai 4 decks
Biomass Mutation price history
The Secrets of Strixhaven Commander #297 printing, as Scryfall reports the TCGplayer market. Updated nightly. Click any version below to chart its price.
Every recorded price change
| Date | Non-foil |
|---|---|
| Nov 11, 2026 | $0.31 |
| Nov 10, 2026 | $0.30 |
| Nov 8, 2026 | $0.29 |
| Nov 7, 2026 | $0.28 |
| Nov 6, 2026 | $0.27 |
| Nov 5, 2026 | $0.25 |
| Oct 30, 2026 | $0.24 |
| Oct 27, 2026 | $0.22 |
| Oct 26, 2026 | $0.23 |
| Oct 21, 2026 | $0.24 |
| Oct 20, 2026 | $0.23 |
| Oct 18, 2026 | $0.22 |
| Oct 16, 2026 | $0.23 |
| Oct 13, 2026 | $0.22 |
| Oct 12, 2026 | $0.21 |
| Oct 11, 2026 | $0.24 |
| Oct 8, 2026 | $0.22 |
| Oct 2, 2026 | $0.21 |
| Oct 1, 2026 | $0.20 |
| Sep 30, 2026 | $0.22 |
| Sep 29, 2026 | $0.20 |
| Sep 28, 2026 | $0.19 |
A row is recorded only on nights the price moved, so each price held until the row above it.
Every version of Biomass Mutation
10 printings, newest first. Prices are the market figures Scryfall publishes, refreshed nightly. A printing with no figure shows a dash rather than a zero, because Scryfall publishes none for some of them. Click a card's art to chart that version's price above.
Secrets of Strixhaven Commander
- Normal
- $0.31
Duskmourn: House of Horror Commander
- Normal
- $0.25
Extended Art
- Foil
- $1.53
- Normal
- $0.23
- Foil
- $0.69
Extended Art
- Normal
- $0.35
- Foil
- $0.40
- Foil
- $0.88
- Normal
- $0.35
- Normal
- $0.22
- Normal
- $0.24
- Normal
- $0.21
- Foil
- $0.69
Prices from Scryfall, which tracks the TCGplayer and Cardmarket markets. They move daily and are a guide rather than a quote. Search TCGplayer for Biomass Mutation. It runs a name search across every version, which covers the printings TCGplayer publishes no direct link to.
Aggregated from Commander games tracked in TurnZero HQ. Every figure counts decks and games only. No individual deck list, player or playgroup is identified. Win rates are withheld below 5 completed games, where the sample is too small to mean anything.
