My guild got to the final part of the Angvar’s Trove Guild Puzzle, but failed that part. When we attempted to try it again, the Legendary Broodmother would not wake up. It remained asleep for the rest of the time we spent in the Guild Puzzle.
If your guild rolls Angvar’s Trove as a Guild Puzzle, make sure you finish the final part with the Legendary Broodmother on your first try!