Foot Ninjas (Foil) (Teenage Mutant Ninja Turtles #147)

Creature — Human Ninja - {4}{W/B}{W/B}
Sneak {3}{W/B} (You may cast this spell for {3}{W/B} if you also return an unblocked attacker you control to hand during the declare blockers step. It enters tapped and attacking.)
When this creature enters, you gain 3 life.
5/5