It’s a purchased item but requires a little extra work by the magician. It was released a few years ago. As best as I can recall it the effect goes like this: Two cards are selected, written on the back of one of the cards is the name of the other chosen card. The front and backs of the cards are shown and no other card has writing on it. Sorry for the rather vague description that is as best as I can remember.
Thanks for the thought but that's not the one. The one I am thinking of is a double prediction. When you get the deck you have to write predictions on the backs of half of the cards. I have the deck all made up but I can't find the instructions or even the name of the trick. If I could see even a demo I would remember how to do the effect.