Lokix

First Impression — When Lokix enters, you may
destroy a target artifact or enchantment. If you do,
create two 1/1 green Nymble tokens.

U-Turn — When Lokix leaves the battlefield, the next creature you cast costs {1} less.

Sucker Punch — {g}{2}, {t}: Lokix punches target tapped creature. Activate only if an artifact or enchantment has entered the battlefield this turn