The WONDER deck is amazing! Take a good look at the deck of cards. 3/4 of the deck has a portion cut out of the corner.
Begin by fanning the deck and only spreading the top stock of normal cards. Make sure your spectator chooses from the normal card stock.
When they return it to the deck face down, you then put the deck away in the card box and take a peek at the card thru the holes. You will see it clearly!
Make it fast and furious. Practice your magic with the WONDER DECK and learn it well!