There's a quest that I found out about only by chance, I don't know from which mod it is, I have tons installed, but none match this quest.
When I enter a well near the arcane university, a quest ''Vampires of Cyrodiil'' starts. As I advance through the dungeon, there are 2 locked doors (one after another, there's 1 door, a small hallway, then the second one). While searching the other dungeon areas, I found 2 levers, both of them said they open a door somewhere when I pulled them. But the second door remained closed, and it says it needs a key to open it. I searched everywhere, but didn't find it.
Has anyone played this quest and knows maybe where this key is located?