Dark Leo & Shredder is a mythic Legendary Creature — Mutant Ninja Turtle Human card from Teenage Mutant Ninja Turtles (TMT), collector number 142. Current market price: $3.35 (foil $4.58), TCGplayer market prices via Scryfall.
Sneak {W}{B} Attacking Ninjas you control have deathtouch. Whenever Dark Leo & Shredder deal combat damage to a player, create a 1/1 black Ninja creature token. Then if you control five or more Ninjas, that player loses half their life, rounded up.