Atom, Scrap-Born Champion

Indestructible
Mimicry — Whenever a creature you control attacks or blocks, you may have Atom, Scrap-Born Champion, gain that creature’s abilities until end of turn.
Resilient Underdog — Whenever Atom is targeted by a spell or ability an opponent controls, you may pay 2. If you do, exile Atom, then return it to the battlefield under your control.
"He may be battered and broken, but he never gives up."