This routine starts like a classic one, but wait...
A blue back prediction card is placed inside an open envelope. It is visible to all the spectators from the beginning of the routine and will be never hidden.
In a deck of card with different backs (of your choice), ask the spectator to choose and sign a card and then lose it in the deck of cards.
What a surprise for spectators when they discover that the blue card VISIBLE SINCE THE START OF THE ROUTINE is the signed card!
Take the deck (of your choice: red, green, or a different brand from one of your favorites decks), ribbon spread them face down (backs showing)... It transformed to another deck (of your choice).
At this point, everybody thinks it's over...Ask the spectator to take his signed card and turn it over... It's a red back card!!!