ABOUT X MARKS THE SPOT

In an attempt to recruit some new magicians, you promise to teach your spectators about marked cards. Once a card is selected and lost in the deck, when the deck is spread, suddenly there is a large black X on the back of one card... their card! This card is then held face down on the palm of the spectator whilst a second spectator chooses a card. Suddenly, the card with the X on the back is turned over and somehow it has changed into the second selection!