Foot Ninjas (#147)

Type: Creature — Human Ninja

Text: 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.

Set: Teenage Mutant Ninja Turtles (#147)