This mystery was created by Ken Ring and is marketed exclusively by Daryl. This mathematical principle is so amazing...I don't even know how it works myself! A packet of cards is given to any spectator. The spectator merely thinks of anyone's name and any small number. The spectator then deals through the cards spelling out the thought of name and dealing out the selected number. Amazingly, the magical 'Key' card is found at the mentally selected number. Works every time and is automatically reset. Go on...unlock their imaginations! Comes complete with a genuine U.S. Playing Card Company red, Bicycle Rider back card for the 'Key' card. If you wish, however, you can easily adapt this to reveal any card (i.e. the joker, your business card, a previous selection, a promotional give away etc.)