Biomass Mutation

Public Decks Using This Card

No public decks are currently using this card.

Character Background

Biomass Mutation reads like a laboratory rewrite of your creatures’ blueprints: as an instant you pick X and every creature you control becomes X/X until end of turn, which makes it an excellent tool for tempo and surprise aggression in token or go-wide decks and a flexible tempo/control answer for defensive reboots. It shines in Simic shell lists—instant speed means you can flash it on the opponent’s end step and attack with a suddenly gigantic army, or set X low to enable sacrifice/death-trigger plays if you run value engines. Practical synergies include token generators (turn twenty 1/1s into twenty X/Xs), +1/+1 counter engines like Hardened Scales or Doubling Season (counters add on top of the new base), and finishers such as Craterhoof Behemoth that care about raw power. Deckbuilding tip: pair it with repeatable token producers and counter-providers so small investments survive variable X choices; because it sets base P/T, remember pre-existing counters and auras still modify final stats, letting you engineer reliable survivability and lethal turns.

Generated using gpt-5-mini · Updated at 2026-05-16 20:40:47 UTC