Biomass Mutation
Commander 2021 — Rare
Instant
Sets Biomass Mutation has been printed in:

Commander 2021 — Rare
Instant
Sets Biomass Mutation has been printed in:

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Sorcery
Until end of turn, creatures you control have base power and toughness X/X, where X is the number of cards you own in exile and in your graveyard that are instant cards, are sorcery cards, and/or have an Adventure.
Legendary Creature — Human Druid (1/2)
Whenever you draw your second card each turn, create a 2/2 green Cat creature token.
: Until end of turn, creatures you control have base power and toughness X/X, where X is the number of cards in your hand.
Creature — Shapeshifter (1/1)
Changeling (This card is every creature type.)
: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.
Instant
Creatures you control have base power and toughness 3/3 until end of turn. You may search your library and/or graveyard for a card named Oko, the Trickster, reveal it, and put it into your hand. If you search your library this way, shuffle.
Legendary Creature — Merfolk Performer (3/4)
As Fluros of Myra's Marvels enters, choose a number greater than 0.
Whenever you cast a spell with power, toughness, or loyalty equal to the chosen number, target artifact or creature becomes an artifact creature with base power and toughness X/X until end of turn, where X is the chosen number.
Partner
Enchantment
Creatures you control have base power and toughness 6/6 and are Oozes in addition to their other types.
Whenever an opponent casts a spell, if it's not their turn, you create a 3/3 green Elephant creature token.
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