The idea of a razor blade magically destroying a pack of cards is not new. Richard Himber included the plot with a device he sold called "Topper". Scotty York, several years ago, published a similar effect that used an ordinary card case for the effect. Razor's Edge doesn't require a chrome-plated prop, and has many advantages over other methods. After removing a pack of cards from the card case and shuffling it, you perform an amazing "Ambitious Card" routine, where one card jumps from the middle of the deck to the top of the deck to the bottom of the deck, etc. Following this, the pack is replaced in the card case along with a razor blade! Then, the case is vigorously shaken a few times. After shaking, the card case is opened and its contents dumped onto the table. The pack has been cut to pieces except for the ambitious card! In the Razor's Edge, there is no switch required for either the card case or the deck of cards--no complicated sleight of hand nor mechanical devices to fail! Aside from the minimal card skill required for the "Ambitious Card" routine, the effect is self-working. Razor's Edge comes complete with instructions, cards, and everything you need.