Ghost Card by Tony Ho and Kelvin Trinh

Any card is selected from a normal deck and it is signed by the spectator. Your spectator puts it back in the middle of the deck. With a flick, you spread the deck open and show your spectator a card in the middle which has a different back from the other cards... And the spectator pulls out that card and it is their signed card!

* Easy to make gimmick
* Easy to do