THREE SMASH HITS! You show a packet of cards (saying that it contains the four Queens) and leave it aside. You also show another packet of four cards and they are seen to be the four Queens. A spectator FREELY touches any card and this is revealed to be, say, the QC.
FIRST EFFECT: The QC is seen to be the only reversed card in the other packet.
SECOND EFFECT: This card has a red back, while the other three are blue-backed cards.
THIRD EFFECT: The three blue-backed cards are seen to have blank faces. Easy to do. Complete with all the necessary cards. At the end everything can be examined