A card is selected (say the 2S) and replaced. A Jumbo card is shown as a prediction (say the 10S) but the spectator denies that it is the selection. Another Jumbo card is shown (say the QC) but it is not the selection either. The selected card is smaller. The two cards are shown back and front and placed one on top of the other. When the top card is lifted, on top of the bottom card is a regular size card (smaller in size and value, say the 7H) but, alas, it is not the selected one. One Jumbo card is discarded. The other Jumbo card is placed on to the regular size card and when lifted a miniature card duplicate of the 2S is seen on top of the regular card! If you want, you can reveal TWO cards with the same method.
Complete with all the special cards (use your own deck).