Adaptive Automaton is a rare Artifact Creature — Construct card from Secret Lair Drop (SLD), collector number 1109. Current market price: $7.09 (foil $6.90), 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.