The Torn and Restored Card trick is one of the most powerful effects you can perform with a pack of cards. This particular method is extremely clean, direct, and practical. Practice it well, and you will have an absolute miracle on your hands!
The idea of using a duplicate corner as a receipt in restoring the card is an old principle that has been published by numerous magicians over the years. The handling of using the box to restore the card is inspired by Jay Sankey.