As you push the card through the deck, the back design visually changes.
From FISM winner Mathieu Bich comes an astoundingly visual change. You take a card from the deck and show the front and the back. You slowly place it in the center of the deck and begin to push it through. As the card penetrates the other end, it changes into another back design. The card can clearly be seen sticking out BOTH sides of the deck with a different back design on each end.

Tutorial : Click
Price: free
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