Overt Operative is a uncommon Creature — Human Ninja Rigger card from Unstable (UST), collector number 64. Current market price: $0.24 (foil $0.56), TCGplayer market prices via Scryfall.
Menace Whenever this creature deals combat damage to a player, it assembles a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)