Shuffle a deck, have a card selected and you've just started what will become the most talked about effect for a long time. Use an ordinary piece of wire to divine a spectator's selected card, and no one will be able to figure out how you did it.
Use a little hot liquid to trigger the wire, or attract attention and use flash paper to reveal the card. Bar magicians even use alcohol and a match to finish the effect. How's that for a stunning card trick!
You can use wiregrams over and over again. People will often want you to "do it again" so we recommend getting more than one for the times this happens. They'll never be able to figure out how you did it, and it will look like real magic.