Cards magically appear or change instantly and visually!
Show an empty envelope and immediately bring up the spectator's card. Or show a card of another value inside and instantly they change to the spectator's signed card.
Put a white card inside and it visually transforms into the signed card.
Display or change sight predictions or display your own business card!
You have to see it to believe it!
Ideal for close-up and cocktail. Easy to do but very strong impacts.