Magic Tricks

Yes, you do have to make your own gimmick, but it is super, super simple. Takes a minute or 2 at most.

The effect is visual, but there are some moves required so it is not 100% clean. When performed correctly there is no reason for them to be asking to look for the deck. Their card can be examined all they want, and it CAN BE SIGNED.

The best part of the gimmick is you make it once, and no further cards are ruined. That's right, no cards are destroyed in the performance. This is the best part of the effect for me.