Donatello, Gadget Master
{2}{U}Legendary Creature — Mutant Ninja Turtle
Sneak {1}{U} (You may cast this spell for {1}{U} if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.) Whenever Donatello deals combat damage to a player, create a token that's a copy of target artifact you control.