ConSeal by Mark Mason

So, ConSeal. You take the seal off a deck of cards, and it disappears. Not into the ether, but onto the back of a card someone's just signed. It's one of those things where you might find yourself asking, "Wait, how did that just happen?"

The seal's not imaginary, and when it shows up on the card, it's a bit of a head-scratcher. It doesn't guarantee a round of applause, but it definitely puts that "huh?" look on their faces. It's simple, clean, and lacks the usual magician's faff, which is a bit of a relief.

No threads, no elastics, and nothing that sounds like you're about to perform minor surgery. Just straightforward trickery. Honestly, it's a bit satisfying how something so simple can make people think you're a genius.

You get a few ways to perform it, so you won't get bored doing the same thing over and over. Try them all out, or just stick with the one that doesn't make you feel like you've got two left hands.