There are many complex main tasks in "The Elder Scrolls 4: Remake", and if you don't pay attention to many places, you will waste a lot of time. The main tasks of the Dagon Shrine are one of them. First, we go to a horse temple outside the wilderness of the Nibel Basin, and go in and ride a dark horse on the road. You can see a cave after walking a while.
How to do the main mission of the Dagon Shrine in the Elder Scrolls 4 Annihilation Remake Edition