This is a very good and entertaining trick. The only issue I have is that after seeing the method,
I thought it could be modified slightly to use a regular deck, perhaps with four add on cards
instead of having an entire deck just dedicated to this one trick. I personally am not likely to do
another trick with a deck that is mostly blank face cards unless it is an ambitious card routine
using one of the blank cards.
It also occurred to me that it would be a pretty good trick with
just thought of dice rolls where you write the numbers down on small bits of paper.