The Great Burning was an ongoing event that occurred in a historical time of conflict, predating the modern calendar. It is marked by the rise of a roving cult that grew to an enormous size. This nomadic army, intent on complete cultural destruction, went from city to city, destroying and burning while gaining new members as it traveled. It is possible that several figures marked by the Outsider were involved in this conflict; however, not much is known about the event, as it occurred a very long time ago and has been mostly eradicated from record.
- The Great Burning, while mostly removed and struck from record, is still mentioned by Overseers in Karnaca as a warning against what might happen should the Empire of the Isles fall into chaos.