Destroy the Thieves Guild - Join or destroy the Nightingales
!!! No ingame requirements for this part of the Destroy the Thieves Guild quest !!!
After you have reported your victory against the Thieves Guild to Mjoll, you can start this part of the quest by going back to Mercer Frey and read his journal (you find it on his dead body). You will be send to Snow Veil Sanctum and you need to fight your way towards the puzzle door of this Sanctum. Normally you can't open this door in the vanilla Skyrim, but with this mod you can (if you have at least 65 lockpick skill and one or more lockpicks) because if Mercer Frey can open this door why can't you do this as well. Karliah will notice you stealing the Skeleton Key alongside Gallus his corpse by the sound you make. She will rush towards you thinking you have killed Gallus, you will be left with a choice either give her Mercer Frey's journal to prove you're innocent or kill the last of the Nightingales. This mod includes the vanilla quests (but duplicated and slightly modified to make them work without Brynjolf alive, don't worry this will not change the vanilla TG questline) Trinity Restored (included in the Hunted by Shadows quest) and Darkness Returns. Including oath scenes and every other scene (thieves guild scene, hallway scene,pre-oath scene, post darkness return scene between Karliah and Gallus). If you complete the Darkness Returns quest, you can live in the Nightingale Hall. As a compensation for not receiving the Nightingale Bow and Nightingale Sword through the TG questline itself, I've added these weapons when you activate the armor stone in the Nightingale Hall.