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 just played ...c5, attacking White's queen. Does White need to react, or can you find an amazing combination starting with a forcing capture?
Black's rook is forced to f7. Can you find a game-winning decoy idea for White?
Black's king is decoyed to a forking square. Finish the combination!