With VDECK you hand your spectator a deck of cards. They examine the deck, remove and sign any card an their signed card is now placed into the box with the rest of the deck. The boxed deck is now placed on your spectators' hand. But...the box somehow gets lighter until it feels empty, well almost empty! When the box is turned over they can see it only contains one card...their signed card!
No funny moves and no palming, the utility does all of the work.
This is a classic of magic re-imagined for the 21st century. Super well made prop and wonderful instructions from a master of magic.