This effect was created by Dai Vernon and was published in Rufus Steele's book The Last Word on Cards.
The deck is shuffled by a spectator. The magician removes a prediction card from the deck and places it face down on the table. The spectator creates two piles. The top card of one is turned face up. The value of that card is used to count to a card in the other pile. The card counted to is the mate of the prediction.
runtime 4min 29s