Leonardo, Cutting Edge (#281)

Type: Legendary Creature — Mutant Ninja Turtle

Text: 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.)
Lifelink
Whenever you gain life, put a +1/+1 counter on Leonardo.

Set: Teenage Mutant Ninja Turtles (#281)