Decoy is a tactic where you force a piece to a square that it doesn't want to be on. This can be used to remove a defender, lure a piece into a fork or even lure a king into checkmate.
Black has a forcing capture, decoying a piece to a square where it will be forked with White's king. Can you find the move?
Black temporarily sacrifices the exchange, attracting White's rook to a forking square. Deliver a crushing fork!
White's rook and protects Black's bishop on e5. Great work!