A black mark drawn on the back of an incorrect card transforms it into the correct card which was selected earlier by the spectator.
For example, the spectator selects the 3 of Hearts. The magician finds a card but it is the 3 of Diamonds. He draws a black mark on the back of the card. The mark penetrates the card and shows up on the front with the correct suit: Hearts.
runtime: 13min 12s
