[abousoun]

Mystery solved :

The Svengali deck of cards is a specially constructed deck that can be used by magicians to perform various card tricks. The deck and the tricks performed with it are self-working and require almost no skill. Burling Hull, a.k.a. Volta the Great claimed to have invented the deck in 1909.

The deck can be dribbled or riffled to create the illusion that the deck is completely ordinary. It can even be shuffled. The trick involves a spectator choosing a card from the deck and returning it; the card can appear practically anywhere in the deck, making tricks like the Ambitious Card incredibly simple. The final and most stunning trick is when all the cards are suddenly presented as being all the same card.

The deck alternates between normal cards and shortened cards, and the shortened cards are all of the same number and suit. When the deck is riffled front to back, only the normal cards are visible; when it is riffled back to front, only the shortened cards are visible.

Unfortunately, this modification means that the conjurer cannot allow an audience member to examine the deck. The use of a Svengali deck can also be detected by its characteristic faster riffle and sound. Finally, because the deck is so venerable and is widely sold in joke and novelty shops, many laymen are familiar with it.

Thank You ...