Oroku Saki, Shredder Rising [Teenage Mutant Ninja Turtles]

Cost: 2 B 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.