Switch Up by Danny Weiser and Magic Tao
From the mind of Danny Weiser comes a SUPER, visual and unique revelation to take the magic world by storm! 'The Switchup' is a hyper visual ink revelation that changes on the front of a card box right in front of a spectator's eyes... AND the card box is then handed over immediately for examination - Wow! Audience tested, this revolutionary gimmick will fry anyone who gets a chance to 'Switchup'!!!!!!!!
Sample routine - A card is chosen by the spectator. You mention that you have a prediction on your card box. You show your prediction to be a question mark. In the blink of an eye, the question mark changes into the spectator's chosen card, for example 5H.
A fully customised 'Switchup' gimmick is included.
"Overall this is a self contained trick that you can carry with you at all times. If you perform any type of card trick and keep the cards in a box why not actually use the box as a bonus effect" -Paul Romhany, *Reviews Vanish Magazine