Bertoxxulous has no allies. His followers often follow the dark art of necromancy, which he wholeheartedly supports. The Plaguebringer appears as a humanoid hunchback draped in tattered, decaying robes. Under his hood can be seen a very handsome face attached to the body of a rotting corpse. He is enemies with Tunare, Rodcet Nife, Karana, Mithaniel Marr, and Rallos Zek. He rules the Plane of Disease, which is dark and drippy with geysers of ooze and rivers of pus. The land itself looks, feels and even smells like decaying flesh, and is inhabited by all manner of evil creatures and undead.
His most influential worshipers are typically necromancers, who seek his blessing in evolving their dark craft. Unlike most of his peers in the pantheon, Bertoxxulous does not share power readily with mortals. Few followers of the Plaguebringer are granted divine might, and thus clerics of the god of disease are rare, and his Chosen even more so. However, those few that are granted his favor enjoy a font of power beyond that of any other divine servant, at immense cost to their physical form.