Donatello, Gadget Master (TMT 283)

Legendary Creature — Mutant Ninja Turtle • Mana cost: {2}{U} • Teenage Mutant Ninja Turtles • Mythic

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.

Illustrated by Kotakan.