Twilight Sepulcher

Description
The Twilight Sepulcher is a location in Skyrim west of Falkreath. This large burial site has been carved into Falkreath’s western mountains and holds several trials to test those who would probe its depths. The door to the dungeon is locked and requires the Skeleton Key to open. This dungeon is part of the quest Darkness Returns, in which the Dragonborn must return the Skeleton Key to Ebonmere.

Quests

 * Darkness Returns

Notable Loot

 * Lockpicking skill book - Proper Lock Design
 * Sneak skill book - Sacred Witness
 * Chests - random loot
 * A lot of Potions

Crafting

 * Alchemy Lab

Bugs

 * Sometimes when you speak to Gallus and the conversation ends, he'll talk to you again.
 * Fighting the second Corrupt Nightingale in the narrow hallway and dying there, can cause your save to become corrupt on occasions.
 * Possibility of door just past Gallus not opening