On this page of the Assassin's Creed Valhalla Siege of Paris guide, you will find a detailed walkthrough of the Darkest Before Dawn main story quest.
Reward: 1,700 XP.
Return to Sigfred's Camp
This mission begins at Sigfred's camp. You have to reach it and wait for the man to appear. You will spend this time reflecting on life and your struggles.
Eventually, Sigfried and Toka will appear. After talking to them, you will need to rest. Go to bed and watch a cut-scene.
You and your companions will attack Paris. Your goal is to fight. You have to defeat some regular opponents and then the boss - Ebels.
Ebles has two weaknesses - his left leg and right hand. If you shoot at these spots, you will deal him massive damage. It is best to keep the distance. The boss's attacks can set you on fire and knock you down.