"Rechanged" really is a magician fooler. This takes card-transportation to a new level!
A card is selected and signed by the spectator and the magician. This card is then held by the spectator in full view while a sealed deck is displayed.. This deck can be held by a spectator.
The signed card is then cut in to the deck, with the spectator seeing their signature until the very last moment. Without the magician touching a thing, the card has vanished from the deck, and the spectator can open the sealed, untouched deck only to find out that their signed card is in the correct place in "new deck order".