| Set: |
Duskmourn: House of Horror Commander |
| Type: |
Instant |
| Rarity: |
Rare |
| Cost: |
{X}{G/U}{G/U} |
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
![Biomass Mutation [Duskmourn: House of Horror Commander]](http://the-vault.mx/cdn/shop/files/577849.jpg?v=1726758438&width=1445)
![Biomass Mutation [Duskmourn: House of Horror Commander]](http://the-vault.mx/cdn/shop/files/577849_6fdf450e-c7db-4d26-b16c-d8404ef45d1d.jpg?v=1727372428&width=1445)
![Biomass Mutation [Duskmourn: House of Horror Commander]](http://the-vault.mx/cdn/shop/files/577849_e6591f36-9c6d-48da-9803-dfc6731296a9.jpg?v=1727500284&width=1445)
![Biomass Mutation [Duskmourn: House of Horror Commander]](http://the-vault.mx/cdn/shop/files/577849_30815227-67e8-4fee-bdca-4ebfdd91a4da.jpg?v=1727880677&width=1445)
![Biomass Mutation [Duskmourn: House of Horror Commander]](http://the-vault.mx/cdn/shop/files/577849_141db4c9-7a90-4098-92fe-d89b056ffa80.jpg?v=1728330476&width=1445)
![Biomass Mutation [Duskmourn: House of Horror Commander]](http://the-vault.mx/cdn/shop/files/577849_ef4f7938-786a-4870-85b4-152d1ee71618.jpg?v=1728395395&width=1445)
![Biomass Mutation [Duskmourn: House of Horror Commander]](http://the-vault.mx/cdn/shop/files/577849_054c4376-3429-489d-84c8-fa1bb2711fd3.jpg?v=1728491600&width=1445)