Leonardo, Big Brother is a common Legendary Creature — Mutant Ninja Turtle card from Teenage Mutant Ninja Turtles (TMT), collector number 14. Current market price: $0.25 (foil $0.30), TCGplayer market prices via Scryfall.
Sneak {W} (You may cast this spell for {W} if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.) Leonardo gets +1/+0 for each other creature you control.