Decoy is a special card. You swap it with a non-hero card on your side of the battlefield, which returns that card to your hand. It’s great for taking back a Spy and replaying it, or saving a strong unit for a later round.
There are 3 copies, all bought. Get one from Elsa in White Orchard, one from the quartermaster at Crow’s Perch and one from the innkeep at the Seven Cats Inn.
Since Decoy is neutral, it goes into any deck.
