From the publisher's website:

Prepare to battle for the throne and restore peace to the city in Blue Moon Legends, a collected version of Blue Moon, Reiner Knizia’s classic card game for two players! In Blue Moon Legends, you gather the allegiance of one of the peoples of Blue Moon City, and lead them in a series of fights against another people. By winning these fights, you aim to attract the fickle attentions of the elemental dragons and win your way to the throne of the city. In Blue Moon Legends, players enjoy all the intensity of the original card game and gain access to every people deck expansion in one box. Your options for play are limitless, but only one player can reign supreme over the city. Prepare for the struggle to begin, and take your place as a legend of Blue Moon City!