You will get
Magician hands out an envelope to make sure it's clipped.
Now the magician asks the spectator to select one card from a deck and to sign on it.
Now the signed card is returned to middle of the deck.
(Now the magician may perform some "Ambitious Card Routines")
The envelope on the table is opened and another envelope is found inside..
Amazingly, the signed card appears from the clipped envelope!
The performer introduces an envelope and explains there is ONE prediction card inside..
The magician asks the spectator to name ANY card in the deck...
However, the named card cannot be found inside the deck...
Why?? The envelope is now opened to see the magician's prediction... The card inside the envelope is exactly the same as the spectator's named card.