Oroku Saki Shredder Rising 68 (Teenage Mutant Ninja Turtles)

Sneak {1}{B} (You may cast this spell for {1}{B} if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.) Whenever Oroku Saki deals combat damage to a player, you draw a card and lose 1 life.