Customer rank: +1
This is a reputation maker routine. It uses a regular deck of cards and it is totally impromptu. You show the four Kings and four black cards. The Kings are placed one by one among the black cards. They disappear and reappear in one packet. Then the Kings are paired up with the four black cards. The Kings disappear and you are left with eight black cards. Finally, you produce the Kings one by one using different stunning methods. Over a dozen effects!