This one’s a stunning mental card effect that’s easily carried in your pocket and ready any time you want to make an impression on your spectators.
The spectator is asked to merely think of one of the four kings. There is no force of cards. As the spectator thinks of the card, the magician removes a pay envelope from his pocket. Inside the envelope, the magician, has four cards. One has been reversed from the other three. The card thought of by the spectator matches the reversed card in the envelope!
And for the clincher it also has a different colored back from the other three cards Kings! A miracle!
No sleight of hand required.
Works every time.