Raphael, the Nightwatcher (#213)

Type: Legendary Creature — Mutant Ninja Turtle

Text: Sneak {1}{R}{R} (You may cast this spell for {1}{R}{R} if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.)
Attacking creatures you control have double strike.

Set: Teenage Mutant Ninja Turtles (#213)