How to Remove the Storm Barrier around Stormterror's Lair?

Continue with the main story until you start the main quest Hurdle. For this mission, you'll have to reach the indicated location in a valley right outside the storm barrier protecting Stormterror's Lair. Once you've reached the location, defeat the hilichurls that will appear and Venti will dispel the barrier, giving you access to the new location.