One and Only Trick by Paul Harris & Tony MaClaren (ONE&ONLY)
You remove a flat, invitation-size envelope from your pocket and dump out an "invisible deck". You direct a spectator to freely "destroy" these imaginary cards until only a single card remains. Let's say the Queen of Diamonds.
The spectator tosses the invisible Queen of Diamonds toward the envelope. You. then slowly and cleanly remove the "one & only " card in the envelope. It's the spectator's "one &only" Queen of Diamonds.
The Envelope is clearly seen to contain no other cards after the "one &only" card is removed.
The card in the envelope is always the exact card named by the spectator.
Uses just one envelope.
No palming, switching, or loading of the envelope.
Self-contained.
Resets in seconds.
Perform sitting, standing or while aimlessly wandering around.