Donatello, Clever Son

Ninjutsu {2}{u}{g} ({2}{u}{g}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Artifact spells cost you {1} less to cast, and the activated abilities of Artifacts you control cost {1} less to activate.
Whenever Donatello deals combat damage to
another player, you may tap or untap target
Artifact.