This is Tommy Wonder's improved version of a Paul Harris 'Torn and Restored' card effect. You truly only use one card. There is no additional card or piece of card that is used as gimmick. You take one card tear it into four pieces and restore it. Of course, there are many little tips and bits of business Tommy Wonder addresses - all of which are lessons you can apply to many other effects.
Tommy Wonder also teaches a very important lesson on putting things into your pockets which will make this action much more natural.