It works great as a standalone, too. The card frequency mechanics make it much more dynamic and interesting than a regular deck of cards. The way it works is that for every 1 Warrior card in the deck there are 5 Rogues, which is indicated by the numbers 1 through 5 on the cards. So the lowest-valued cards are (usually) the most powerful, but also the rarest.

This seems very, very interesting. Will play RDI with this as soon as possible!