InsaneWAVE by Dee Christopher

I wanted to take the effect further, I loved the image of spreading a deck and having multiple cards with different backs, I began work on forging a solution with several thoughts in mind.
I wanted this deck to be normal, so that a spectator could handle it or I could do other ESP or card effects with it.
I wanted the method to work with playing cards, ESP cards or any other type of photo or card.
I didn't want to use rough and smooth, I wanted a set up that was easy and FAST.
I wanted it to work EVERY time.
This is the effect and solution that I came up with. The basic effect is as follows:

A spectator is handed a deck of ESP cards and shown the 5 sets of 5 symbols. They are asked to shuffle and just name one symbol. Let's say they named a circle.

The performer then spreads the deck across the table or in his hands face down. 5 cards are seen to have red backs in the blue deck. These are revealed to be the 5 circle cards.

Dee Also details how to create a living/dead style effect using this method and talks about doing this with playing cards also.