DeKrap

Check out the DeKram deck from Magic Masters. You have to admire people who give away the secret to their trick ON THE PACKAGING.

Don't believe me? Check out the author of the instruction manual: Dr. A. C. DeKram. Dr. A. C. DeKram? Have you ever heard of him? Oh wait, it's "Marked Card" backwards!

[Thanks to Doug Stewart and the M&M Magic Product Review for the tip.]