This is an effect based on a method by my late dear friend Ned Rutledge.
Effect: The mentalist states that he will attempt to project a thought, piece by piece to members of the audience. At the end the result will be one thought!
With that he turns to a spectator and states the a standard deck of playing cards are divided into two colors, Red and Black. The spectator is ask to chose one. With that another spectator is ask to decide which of the two suites he would like. Now that a suite has been chosen the next spectator is ask, odd or even of the 13 cards the are in that suite. Another spectator is ask high or low and a range of what is each is give and the spectator chooses. Now the last spectator is to chose one final card. So that using several members of the audience, chosen at random, a single card or thought is arrived at by chance . . . or is it? Could it be that this is , as the Mentalist stated, that one thought he talked about?
Now the Mentalist removes a closed deck of playing cards, opens the box and removes the cards which are blue backed. He runs through the cards and stops as he comes to a Red backed card. Now closing the cards he states, "Why the Stranger? Could it the very card or thought?" "Yes" he states! "Before leaving for this show I removed a card at random from this Blue backed deck and replaced it with a card, of the same value, from a Red backed deck!" Again he starts through the cards from one hand to the other. Finding The Stranger he lifts the deck to his mouth and with his lips removes the Stranger. Still the Stranger has it's back to the audience and the Mentalist says something along the lines that maybe you think things are not on the up and up. (you decide what to say) but with that he hand the balance of the deck to a spectator and says, "Find the (Value of the chosen card)!" The spectator looks through the whole deck and can not find the card. With this the Mentalist turns around The Stranger! Its the chosen card and can be tossed on the table to prove that it is a single card.
Please note this is NOT a trick deck. You receive only instructions in PDF form as any cards may be used. The move are simple and fully explained and there is only the one!