Cards are set on the card stand. Audience chooses one of the suits of the
Jacks. (Let's say Hearts)
When the magician spreads the cards, only Jack of Hearts is facing the
audience. Also the back color of
the Jack of Hearts is different from others. Finally, magician reveals
the rest of the cards and they are all 4's.
(4 of spades, and 4 of clubs)
ANY SUIT can be freely chosen!
No Technique Needed!