Event on Colossal Cavern

At the gate of your village you find your guards on alert. "Sire, we feared you had fallen into a trap," says your captain with visible relief. "We had thought our problems were due to a gang of rogues who have holed up over at the old mill, but now it appears that something more sinister is afoot. Arm yourself well, sire, for the forces of the undead are loose on the land!"