Circa reference stardate 1/65 (circa 2230), Margon held the rank of sutai of the Demma line. He officiated at a game of klin zha kinta played between Force Leader Mabli vestai-Galann and Thought Admiral Kethas epetai-Khemara, and tossed spindles to determine who would go first. When Mabli's cheating during the match was exposed, Margon killed him for it.
Margon claimed to deny the existence of the komerex zha - the Perpetual Game. Nevertheless, prior to the match, he had caused Vrenn to be labeled as being of the line of Rustazh, such that Kethas would adopt the son of his old friend, Kovar sutai-Rustazh. Thus Margon and his allies could use Vrenn against Kethas.