Acaan Prediction by Francesco Ceriani.

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Imagine to have two regular decks of cards.
The spectator can freely choose a two digits number, count the cards until that number and remember the choosen card. No control on the deck by the performer.
Despite this, in the other deck there will be a 100% accurate prediction card.

!Key Points!
Two regular deck of cards
Completely self working
No sleight of hand
No memory work