Diomedes was a farmer living in the hamlet of Seram. He was the father of UldyssianMendeln, and Ameli, and a good friend of Tibion the innkeeper.

Diomedes succumbed to a plague that ravaged the countryside along with his wife and several of his children, some years prior to the events of the Sin War. This event caused Uldyssian, one of the few left unscathed by the plague, to doubt and mistrust both the Cathedral of Light and the Triune's intentions, making him a perfect pawn for the sinister plans of Lilith.

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