Gimmick Queen Card
The Magician shows an envelope and then a card with all for suits on it, He asks the spectator to put 2 fingers on the same colour suit.
Lets say the spectator puts his 2 fingers on the black suits, The magician says fine you have eliminated the black suits now please name one of the red suits you want to eliminate hearts or diamonds…. lets say the spectator says he wants to eliminate hearts so the final choice left is diamonds.
The magician then takes the queen out of the envelope revealing that he indeed knew the spectator would choose diamonds.