flavorText: 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.
name: Biomass Mutation
originalText: Creatures you control have base power and toughness X/X until end of turn.
printings: C19, C21, DSC, GTC, PIP, PLST
text: Creatures you control have base power and toughness X/X until end of turn.
type: Instant