Duskmourn: House of Horror Commander · #214
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Creatures you control have base power and toughness X/X until end of turn.
Abilities, attacks, weakness & resistance
Other cards from Duskmourn: House of Horror Commander
Goryo's Vengeance
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Biomass Mutation (DSC-214) is an Instant from the Duskmourn: House of Horror Commander set. It sets all creatures you control to have base power and toughness X/X until end of turn, overwriting effects that set specific power/toughness values while still interacting with modifiers and counters. Casting it with X=0 will make creatures 0/0 and likely put them into the graveyard, so X choice matters for survival and impact.
Catalog pricing data as of 20 Apr 2026, 00:04
