Special rules for advanced players are already included that allow players to use cards of other peoples with their chosen people. Every card has a printed value (moons). Both players are allowed to use cards of other peoples than the chosen one with a sum not higher than 10 moons in addition to their own people. Every set already contains a small number of cards of different peoples, so these rules are already implemented and used in the already available sets.
You can find the cards of each available people along with a description of the people in the „Game“-section. A brief summary of the background story and why the peoples of Blue Moon fight each other, can be found in the section Legend
. A lot of additional information about the world Blue Moon, the events before, in and after the Night of Doom are described on the cards itself. The complete rules can be found in the Rules