United as the Five Companions with Lyris Titanborn, Abnur Tharn, The Prophet and Sai Sahan, the Soulless One is able to take back their soul from Molag Bal. However, one of three companions (Lyris Titanborn, The Prophet or Sai Sahan) must be sacrificed in order for the Soulless One to receive Akatosh's power from the Amulet of Kings.
- Enter Heart's Grief (Optional: Talk to Abnur Tharn)
- Talk to Abnur Tharn
- Explore the hall
- Talk to Mannimarco
- Continue to the throne room (Optional: Release Mannimarco)
- Approach the Seat of Tyranny
- Wait for the Five Companions to assemble
- Talk to Abnur Tharn
- Choose the sacrifice
- Perform the ritual (Stand in position)
- Receive the power of the Divines
- Vanquish Molag Bal
- Approach the source of the voice
- Reclaim your soul
- Witness the aftermath
- Talk to Meridia
- Return to the Harborage
- Talk to the survivors
- Talk to Cadwell
The Soulless One must fight his way past Daedra until he confronts Molag Bal at his throne. Then, he can use the Sacrifice of Courage to begin to fight directly with Molag Bal. After a long battle, Molag Bal is weakened and falls to his knees, and the Soulless One uses the power of Akatosh to cut him in half. After he is cut in half, Molag Bal is defeated and returns to his own realm.
The Soulless One is then transported to the Colored Rooms by Meridia where she stored his soul when Molag Bal was defeated. Here, the Soulless One reclaims his soul. Meridia and Molag Bal appear. After Meridia banishes Molag Bal from her realm, she tells the Soulless One that Molag Bal has been severely weakened, and it will take him a long time to gather his strength. Abnur Tharn fled with the Amulet of Kings back to Cyrodiil, but he is unable to use it. The tear in the veil between Oblivion and Nirn has been repaired. The sacrificed member of the Companions becomes part of the Soulless One, and the Soulless One is able to travel to other alliances. After then, the Vestige can then do side quests and/or continue exploring and leveling up.
- One of the following weapons, depending on who was sacrificed:
- 1 Skill Point
- Molag Bal has a health of 6.4 million, which until the trials were added, was the highest in any elder scrolls boss battle.