Yu-Gi-Oh! Volumes 25-31
Over the course of the duel, Joey figures out that Odion isn't Marik. Because Odion has fought fair, and Marik doesn't. Marik tells Odion to use the counterfeit Ra in his possession to convince him that he is in fact Marik. Odion summons Ra and tries to make it attack, but the dragon strikes lightening down upon him.