They look like classic ESP (or Zener) Cards from the early 20th century but they hold a clever secret only you can see!
On the backs are an antique design reminiscent of the early 1930s. These are similar to the type of cards JB Rhine may have used in his famous psychic experiments at Duke University!
Flawlessly embedded on the backs of each card is an almost sinister secret, even other magicians may have trouble seeing it! Yes, these are the Ultimate Marked ESP Cards!
Most marked card effects will work with this standard deck of 36 cards.
Amaze friends and clients with your mental and psychic fortitude and order a pack today!