Card TypeLegendary Artifact RarityRare Power/Toughnessnull/null Legalities Whenever a creature you control with a +1/+1 counter on it leaves the battlefield, create a Mutagen token for each + 1/+1 counter on it. (A Mutagen token is an artifact with "1, T, Sacrifice this token: Put a + 1/+1 counter on target creature. Activate only as a sorcery.")

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