Double ACAAN by Creative Artists (Instant Download)
A powerful effect with both magician and audience.
Two spectators select two cards, and two numbers. The number of spectators 2 match the location of the card they chose. And then the deck will be shuffled by both audiences.
At last, the total of two audience's will match the location of the first card.
Best of all, the spectators can shuffle the deck, and count by themselves. Until the trick is finished, magician really do not know the numbers are selected.