Shredder, Shadow Master is a rare Legendary Creature — Human Ninja card from Teenage Mutant Ninja Turtles Eternal (TMC), collector number 88. Current market price: — (foil $91.17), TCGplayer market prices via Scryfall.
Whenever Shredder attacks a player, for each other opponent, create a token that's a copy of Shredder tapped and attacking that player, except it isn't legendary. Sacrifice those tokens at end of combat. Whenever Shredder deals combat damage to a player, that player loses half their life, rounded up.