The Disciples of Sadow are the members of Clan Naga Sadow. The disciples comprise its students, apprentices, knights, governors, summits, consuls. They are the followers of the Overlord Astronicus Sadow.
Behind the Scenes
In short, the Disciples of Sadow are all those members of Clan Naga Sadow who are not Sons of Sadow. It is the term given to regular members of the Clan.