The quest "Search for an Assassin from the Past" is available only to those players who pass the story of the Dark Brotherhood. In order to get the quest in your journal, you will first have to complete one more task, which is called “Vulnerability”. At the same time, during the passage it is necessary to take into account additional conditions, which will be mentioned.
If everything is done correctly, then as a reward for this story quest you will get the mascot of Olava. He, in turn, will open access to a special prophecy.
Whiterun and Forest Bastion
To begin with, we return to the city of Vaytran and we are looking for Olava the weak. We show her amulet, the old woman will immediately see what's what and tell us the story of a certain Dark Brother. It turns out that this assassin found his last refuge in the tomb, located in the northwestern part of Skyrim. This tomb is called Forest Stronghold, and that's where we will go.
The location is located deep in the mountains, next to the Dragon Bridge settlement. This place is teeming with dangerous outcasts, so we advise you to prepare for the trip. In addition to living opponents, the tomb meets any uninvited guest with a variety of traps. We pass the location to the very end.
Witch’s nest in Skyrim. Door behind the throne
Having got out of the Forest Stronghold, you will find yourself in the Forest Valley. Do not lose vigilance in this spacious savage camp and go through it to the end. Finally, you will reach another Skyrim tomb - the Witch's Nest. Inside you will be attacked by several witches and witches. In addition, you will also have to deal with traps and magic runes.
Explore the location. Fortunately, you don’t have to go far: there is a door behind the throne in the Witch’s Nest in Skyrim. You can find her in one of the rooms. Opening this door with a lever, you will find yourself in a small room. Take a closer look, this is the last refuge of the assassin. We take the loot and return to the fraternity.