The magician writes down a prediction and places it aside, sight unseen. A deck of cards is introduced, shuffled and handed to a spectator along with a pen. The spectator holds the cards behind her back and marks any card with a large X. The magicians prediction is shown and it proves to be a perfect match to the spectators selected card! Absolutely no sleight-of-hand required with no switches or forces and immediately resets. Diabolical principle that baffles magicians, too. Includes everything necessary to immediately begin and a detailed manuscript written by Joshua Jay and illustrated by Tony Dunn.