Pit Automaton is a uncommon Artifact Creature — Construct card from Aetherdrift (DFT), collector number 238. Current market price: $0.22 (foil $0.34), TCGplayer market prices via Scryfall.
Defender {T}: Add {C}{C}. Spend this mana only to activate abilities. {2}, {T}: When you next activate an exhaust ability that isn't a mana ability this turn, copy it. You may choose new targets for the copy.