Adaptive Automaton is a rare Artifact Creature — Construct card from Magic 2012 (M12), collector number 201. Current market price: $1.35 (foil $3.68), TCGplayer market prices via Scryfall.
As this creature enters, choose a creature type. This creature is the chosen type in addition to its other types. Other creatures you control of the chosen type get +1/+1.