The Great Burning was an epochal event in the history of the Isles that immediately preceded the establishment of the modern calendar. It was an era marked by the rise of a roving nihilistic cult that grew to an enormous size. This nomadic army, intent on complete cultural destruction, went from city to city across the Isles, destroying and burning while gaining new members as it traveled. It is speculated that several figures marked by the Outsider were involved in this conflict, but as it occurred a very long time ago and has been mostly eradicated from historical record, such claims cannot be substantiated.
- 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.