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Biomass Mutation [Duskmourn: House of Horror Commander]
| Set: | Duskmourn: House of Horror Commander |
| Type: | Instant |
| Rarity: | Rare |
| Cost: | XG/UG/U |
| Colors: | GU |
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