Confiscation Coup is a rare Sorcery card from Kaladesh Promos (PKLD), collector number 41s. Current market price: — (foil $0.38), TCGplayer market prices via Scryfall.
Choose target artifact or creature. You get {E}{E}{E}{E} (four energy counters), then you may pay an amount of {E} equal to that permanent's mana value. If you do, gain control of it.