Clipped Revelation
I originally had this effect published in The Linking Ring magazine (the official publication of The International Brotherhood of Magicians) in the August 2020 edition, page 84. I also marketed it as a DVD and instructional video on Amazon.
Essentially, a jumbo card is openly displayed; it is, say, the King of Clubs, and it is then placed on the magi's table. There is also a paperclip on the table. A spectator instructs where and when the magician is to stop dealing cards faces down, on to the table as well; the deck is completely normal in every way, and the spectator may shuffle it to their heart's content beforehand.
The spectator calls "Stop", and the card before and after the selection is shown to be different.
This face-down selection is paper-clipped to the back of the jumbo King of Clubs. The fairness and openness of this entire procedure is emphasized.
The spectator or the magician then turns over the jumbo King of Clubs, and on the back is seen to be clipped a normal size King of Clubs!
Essentially, a jumbo card is openly displayed; it is, say, the King of Clubs, and it is then placed on the magi's table. There is also a paperclip on the table. A spectator instructs where and when the magician is to stop dealing cards faces down, on to the table as well; the deck is completely normal in every way, and the spectator may shuffle it to their heart's content beforehand.
The spectator calls "Stop", and the card before and after the selection is shown to be different.
This face-down selection is paper-clipped to the back of the jumbo King of Clubs. The fairness and openness of this entire procedure is emphasized.
The spectator or the magician then turns over the jumbo King of Clubs, and on the back is seen to be clipped a normal size King of Clubs!