Its a good trick.
it add something to my card to wallet (envelope)
i have many
recipt ready in my wallet where I have writen a card prediction, a spectator takes a card and signed
it, i open the wallet inside I have recipt with a prediction. The prediction is wrong then I burn
the right card in the recipt.
After that I make they check the wallet and inside the wallet
(envelope) is their card.
Thats why I gave it 4 star because it add something to a routine
I already do.
But if you just gonna use it as a reavel I dont think it is that great. You
need a good routine to use this.