"The first card effect that doesn't need cards. You only use a regular box and an incredible prediction".
"52 free possibilities, a single prediction and an unforgettable souvenir".
Imagine taking out your deck and placing it on the table.
Then you ask a spectator to think of ANY OF THE 52 CARDS.
With completely clean hands you show a paper inside the cellophane of the box with a written prediction of the chosen card.
But there is more.
You take the paper and add the date and your signature after the message and you give it to him as a souvenir of the unexplained experience.