There is an effect that you go through the cards and predict a card.
You ask the spectator to get 10 or 15 cards and you the performer put 20 cards on the table
face up. Have the spectator count his cards and
go to the cards on the table and count
to the number in his packet until he lands on the card in the spread. The performers card and the spectator cards match in color and value.

I found the source of the effect It is a pdf "Ultimate Card Magic Tricks". The effect is called "Double Prediction". It only showed few pages but that was one of the effects in it.