During his story mode, Dumon determines that he must be Nash, as Nash had always worn the same hat. Yuma Tsukumo recalls a story his father told him about the hat. His father had found the hat on one of this adventures. He told Yuma to never touch it, as it had the power to change the fate of the world.
These Decks are used when he is an opponent in Free Duel Mode.
The Knights of Chaos who Pursue the Twilight (宵闇を駆る混沌の騎士団, Yoiyami wo Karu Konton no Kishidan) ★7