I can´t do the trick in its full potencial with the deck I got.
Funny thing: about 80% of the cards are white cards. The rest of the cards have different colors/drawings that when put side by side with the selections (in the second phase) it gets pretty obvious that they have the same back. Lack of luck.. In my case, the selections are from decks tragic royalty (grey) and the cannabis deck (a very distinctive green-yellow tone).

The reactions are still good at the end of the trick, but I found that the moment before the revelations loses all its mystery.

But hey! it´s a GREAT trick. I will just have to scavenge old decks for new selection cards.