Fusion

Fusion

 A card is freely taken from a deck by the spectator, the magician also takes a card, both cards are marked with initials on the face, the magician places his card on the spectators hand, and places the spectators card in his pocket, when the card is pulled out of his pocket it has changed to the magicians chosen card, the spectator now has his own card in his hand, they both tear their card in half, choose a piece to discard and a piece to keep, the magician takes the remaining pieces and places them together with a rub of his hand both halfs of card are now fused together the spectator may inspect and keep the card.