The Catabrume, or “The Great Undoing”, also known as the “Last Adventure” by the Searslander and the Itridi Sephlings, is a major event of historical celebration, marking the return of the Last Adventurers in their quest to push back the mist. By defeating the large and deadly Casskarr and using their fallen powers to fuel the Theri Crystal at the heart of a failing Arlemany, the Last Adventurers were able to greatly increase the boundaries of the Purelands, pushing the mists back to the mountains and opening up vast barren lands that were slowly turned into grassland and forests.