Nick Trost's Classic Packet Tricks - Unknown Card - Trick
You can out six cards to show three face-up Fours and three face-down cards. The cards are turned over and re-fanned to show three Tens. An "unknown" card is removed from your packet and inserted into the fan. You now deal the Fours face down to a spectator while you hold the Tens and the "unknown" card.
Your cards are squared, turned end-over-end three times, ,and refanned. The "unknown" card is pocketed. The Tens are now gone-face and backs of blank-face cards are shown! The spectator's cards are turned over and the Fours are gone! Finally you show where the spots went-they're on the face of the "unknown" card!
Easy to do. Complete with special cards.