In this effect you ask two spectators (ideally a couple) to take a card.  It happens to be the queen of hearts and king of spades. They sign  their names and both cards are placed face to face on their hands.  When  they open them, they will realize that the queen and the king are now  fused by their hands. this makes a very romantic surprise that the  couple can keep as souvenir.

50 gimmick cards ready to use.