This is Utility Prop, Use this in Ambitious Card routine with a surprise ending!
A signed card is placed in the center of a deck. With a snap of the fingers, the card appears magically on top of the deck! This is done without any cuts or shuffles. It just magically appears!
The effect is repeated two more times, then the deck is placed in the spectator’s hands.
The signed card is placed in a pocket. Another snap of the fingers and the signed card appears back on top of the deck! Explain that it really should be easy to see through this trick because the deck is not a deck at all, but a block of plastic! As they are holding the deck, it changes to a SOLID BLOCK OF CLEAR PLASTIC!
A real blockbuster ending!