Nightingale Hall Restored - Karliah as a Follower

Upgrades Nightingale Hall into a more liveable and functional space and allows Karliah to become a follower.  Adds a portal to the Twilight Sepulcher, ability to level up Nightingale gear, and other features.  These changes will occur after the completion of the quest Darkness Returns.

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• []Karliah will now follow the player and has the appropriate voice responses using her own unique voice[/]

  []Portal to the Twilight Sepulcher[/]

  []When activated, Nightingale Armor stone now upgrades your Nightingale armor & weapons once you reach the next level.[/]

  []Shrine to Nocturnal[/]

  []Kitchen area with cooking pot[/]

  []Alchemy table, workbench & grindstone[/]

  []Various sacks, barrels & chests for safe and convenient storage[/]

  []Training room with 2 weapon racks & 3 plaques, plus training chest[/]

  []Bedroom with 3 beds and lots of additional storage (beds give well-rested bonus)[/]

  []Two alternate versions of the Nightingale gear to compliment the different Nightingale qualities (see Notes, below for details).  In addition, I've added 2 more levels to the vanilla Nightingale gear, so it will continue to scale with your high-level characters.[/]

  []For female characters, I've added an unenchanted version of Karliah's leather armor to dresser in bedroom.  This will look like regular Thieves Guild armor on males.  I've given it the same base stats as the upgraded Thieves Guild set.[/]

  []Ability to acquire Karliah's unique paralytic poison.[/]

  IMPORTANT-- PLEASE READ: Karliah's Knapsack & the training chest are set to respawn their contents every 7 days.  This will happen regardless of whether the player enters Nightingale Hall during that time.  Do not store anything in these two containers or it will disappear.  Every other container in the cell is safe for storage.

  The entire cell is set to never respawn, therefore the plants will never regrow once you've picked them.  All of the containers are safe for storage with the exception of Karliah's Knapsack & the training chest.

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  She will now change back to her leather Thieves Guild outfit (minus the hood) after the quest Darkness Returns. After looking in the creation Kit, it appears that she was probably intended to revert back to her original armor at some point during the questline. After Darkness Returns she will also be willing to follow the player.

  In addition, I've given her some new perks and altered her stats slightly to make her more suitable as a high-level stealthy follower. She has Lightfoot and won't trig