Highfell (5E)

Publisher's blurb: Local villagers call for aid! An eerie green light appeared atop the Dwimmerhorn Mountain. The light came from HighFell - the ruins of an ancient wizard school. The infernal blaze grew until a great explosion rocked the mountain. Like a massive floating island, HighFell pulled away from the mountaintop and now slowly drfits across The Great Salt Reach. What happened to HighFell? Why does it float eerily across the landscape? Are you brave (or foolish) enough to explore the ruins of HighFell: The Drifting Dungeon?