Imagine introducing a single playing card from your pocket without showing anyone the face of the card. Have the spectator call out any card through a process of their imagination. When your spectator reveals the card they're thinking of, you turn the card over to show that the prediction hits. Works EVERY TIME!
It's effortless, fail-proof, and there's no sleight of hand.
It's a powerful card prediction effect that will always be ready in your pocket.