Sukma by Nawa Birawa & Steve Marchello
This is a truly unique angle to the classic drawing duplication plot!
You ask the participant to write someone's name on a card and then ask them to put the card in an envelope. The participant covers the envelope with their hands.
Despite these conditions, you can draw or describe exactly what is written on the card!
No special envelopes, no need to peek at the card, no electronic devices, no switching.