What type of card is Biomass Mutation?

Question

Accepted Answer

Biomass Mutation is an Instant. Its oracle text reads: "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