21st Century 21 Card Trick by Ed Marlo
Leave it to Ed Marlo to have such an above-the-board view of card magic that he knew which was the perfect effect to upgrade. It is amazing how many laymen either knows how to perform the original version of the 21 Card Trick, or knows enough about the effect to understand the method is based on some mathematical principle. Which means they will be totally misled from the very beginning, and left with absolutely no explanation when you are done! This really is a brilliantly structured effect - the little ‘move’ that makes it all happen isn’t even suspected or looked for, because people will be expecting something so completely different.
Originally from "Easy to Master Card Miracles Volume 9" DVD.
21st Century Card Trick Explanation