Shellshock (Teenage Mutant Ninja Turtles Eternal 25s) - Surge-Foil - Rare Magic: The Gathering Card

For each opponent, choose up to one target creature that player controls. Shellshock deals X damage to each of those creatures. You create a Mutagen token for each creature dealt damage this way. (They're artifacts with ", , Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")