This article is about the Tribunal god Sotha Sil. For the city of the same name, see Clockwork City.
- "I am whatever the people need me to be. A guardian. An oppressor. For some, too distant. For others, too meddlesome. I am the canvas upon which they paint their dreams and resentments. A vessel for their hopes and doubts. A mirror. Nothing more."— Sotha Sil
Sotha Sil, or Seht, wizard-mystic god of the Dunmer and "si" in the Almsivi, was the most enigmatic member of the divine Tribunal. Known as the Father of Mysteries, Magus, Magician, Sorcerer, Tinkerer, Clockwork God, the Light of Knowledge, and the Inspiration of Craft and Sorcery, Sotha Sil was said to be reshaping the world from his hidden Clockwork City. The last survivor of a minor Dunmer House from a long-forgotten town, Sotha Sil became a great wizard in life and later discovered how to use Kagrenac's Tools on the Heart of Lorkhan to steal its divine powers and become a god. He is an architect of time and a binder of Oblivion.
After Nerevar's death, the councilors of Nerevar and the Tribunal of Vivec, Almalexia, and Sotha Sil came to power among the Dunmer. They then went against Nerevar's dying wish by using the profane Tools of Kagrenac on the Heart of Lorkhan in order to steal its divine essence for themselves.
The Clockwork City is believed to have been constructed some time after the rise of the Tribunal at the Battle of Red Mountain, when Sotha Sil harnessed divine power from the Heart of Lorkhan with the use of Kagrenac's Tools in the First Era. During the genesis of the city, Sotha Sil's vision of a self-contained world made of brass and machinery was very ambitious and he developed highly advanced methods to see it through. He drew inspiration from the Dwemer, and their influence in his work is rumored to be traceable as far back as before the disappearance of the Dwemer. Among these influences was his research on Dwemer tonal architecture. He refined it further and created items based on their research, such as tonal forks that could function as a divining rod. Ultimately his style became his own and the city's structures, vegetation, and wildlife are all mechanical constructs of his own design.
Sotha Sil is rumored to have created the constructs known as Clockwork Dreugh sometime during the Battle for Red Mountain. It is said that Vivec asked Sotha Sil to come up with some plan to help stop the Dwemer's Automatons from slaughtering the Chimer during the battle. Out of necessity, Sotha Sil created an army of Clockwork Dreugh that were inspired by Dwemeri war machines, to be used against the Dwemer. They were said to have risen up from the seas and took their counterparts to the water beneath to be swallowed by the sea.  It is unknown if they were the part organic, part inorganic creatures known as Fabricants,  which are rumored to be the first step towards the convergence of Nature and engineering.
He also created the first Factotum, mechanical constructs that are usually humanoid in appearance, sometime in the First era. They are an invention of need, and were created to maintain the Clockwork City. As such they have become an integral part of daily life for the inhabitants of the city, and are vital to running its everyday processes. Factotums have been improved over time with the early factotums having more of a Dwemeri appearance. Factotums have also been experimented with and mortal souls have been successfully transferred into them, but a common defect is that it may make the subject turn insane, with the most notable examples being the three Dunmeri Saints.
Towards the end of the First Era, around 1E 2920, Sotha Sil spent some time on the Isle of Artaeum, where he taught some of the new mages of the Psijic Order. Sotha Sil also further tinkered with his clockwork creations as well as Dwemer creations and left behind some of his creations when he departed back into the Clockwork City.
After a Daedric disaster in the village of Gilverdale, Sotha Sil journeyed into Oblivion via the Dreaming Cavern and made a pact with eight of the more prominent Daedric Princes: Azura, Boethiah, Hermaeus Mora, Hircine, Malacath, Mehrunes Dagon, Molag Bal, and Sheogorath. known as the Coldharbour Compact. The exact terms of the pact are unknown to most inhabitants of Tamriel. At the time of the pact, the Princes agreed not to answer any summoning by amateurs until the war between Morrowind and Cyrodiil ended; only the Psijics, along with sorcerers and witches, could counsel with the Daedra.
Sotha Sil's pact failed to prevent the destruction of Mournhold. A Dunmer witch managed to summon Mehrunes Dagon to seek vengeance on the Duke of Mournhold following the death of her child. Although Sotha Sil and Almalexia were too late to prevent the devastation, they managed to banish the Prince of Destruction back to Oblivion.
Around 2E 583, Nocturnal tried to take control of the Clockwork City. She summoned Sotha Sil's Shadow, who replaced him as ruler of the Clockwork City. Meanwhile, one of the Clockwork Apostles, Chancellor Gascone Dusant, sought to deliver the Skeleton Key, which had been accidentally found by a Factotum beneath the Brass Fortress, to Clavicus Vile, only for the Key to be stolen by the Blackfeather Court. The Soulless One, assisted by Divayth Fyr and the Clockwork Apostles, unveiled the plot, but were unable to reclaim the Skeleton Key before it was taken by Sotha Sil's Shadow. Using the key, Nocturnal and the Shadow attempted to seize control of the Clockwork City, but were stopped by the Soulless One, Divayth Fyr, and Proctor Luciana Pullo, who rescued Sotha Sil by defeating his Shadow. Sotha Sil then gave the Skeleton Key to Divayth Fyr for safekeeping.
Sotha Sil became involved directly in the affairs of the Nirn, when Nocturnal subsequently tried to take control of the Crystal Tower. Using a technique she stole from Sotha Sil involving utilizing life energy as a power source, she planned to use the life energy of Nirn, and then the energy of the other Daedric Princes afterwards, to amplify the Crystal tower to make her power limitless. Nocturnal's plan was foiled by the Psijic Order and the Soulless One, with the assistance by the two betrayed Princes (Mephala and Clavicus Vile) and the champion of Meridia known as the Golden Knight. The divine power of Meridia's Dawnbreaker was then used to restore the tower's stone, Transparent Law. Sotha Sil then made negotiations with both Mephala and Clavicus vile and the two have agreed to a compact to put an end to their direct meddling.
In 2E 882, when the Tribunal visited the Red Mountain for a ritual to replenish their divine power, the reawakened Dagoth Ur and his minions ambushed them and drove them away, cutting off access to the Heart of Lorkhan. The Tribunal were able to kill Dagoth Ur and his kin after this initial setback, but they were always revived by the Heart. To contain them, the Tribunal erected the Ghostfence around Red Mountain. In 3E 417, after centuries of becoming weaker and more desperate, Sotha Sil and Almalexia lost two of Kagrenac's Tools, Keening and Sunder, to Dagoth Ur's forces. Vivec rescued them, but they could not recover the stolen Tools and had to flee Red Mountain.
Sotha Sil once spent time counseling, guiding, and protecting mortals, loving them perhaps more than either Vivec or Almalexia. He is said to have felt the stress of each of his people, but assigned them no more load than he knew they could bear. In time, Sotha Sil became almost completely detached from the real world. He gradually lost touch with the affairs of the Dunmer, the rest of the Tribunal, and eventually all of Tamriel. Losing Keening and Sunder was his last known participation in mortal affairs.
Sotha Sil worked on developing The Mechanical Heart, a replication of the Heart of Lorkhan, to act as a new power source for his City. The Heart became unstable in its early development, and to prevent the Heart from destroying the City, he created his own variant of Kagrenac's Tools to control, shape, or even dismantle the Heart if necessary. The development of the Heart would be threatened as the day arrived, just as he predicted, where his friend Almalexia would come to kill him. In 3E 427, the goddess Almalexia, having been driven mad by her loss of immortality, manipulated the Nerevarine to retrieve Barilzar's Mazed Band, which she used to travel to the Clockwork City to murder Sotha Sil in cold blood. When Almalexia came face to face with Sotha Sil, he said not one word, making her think that even in death, Sotha Sil mocked her with silence. In reality, he was likely in another state of mind and was unable to respond, a result of being plugged into the control center within the Dome of Sotha Sil. In his final moments, he attempted to use his control center to seal the Chamber of Lorkhan to prevent it from falling into the wrong hands and to ensure the City would live on after his death. He was successful in sealing the Chamber and his machines began finishing the construction of The Mechanical Heart within it. After murdering Sotha Sil, Almalexia transported his fabricants into Mournhold to wreak havoc. She then tricked the Nerevarine into going to the Clockwork City to kill the late Sotha Sil, who she blamed for the attacks. Once there, she attempted to murder the Nerevarine as well, but her divine powers had waned, and as a result, she wasn't powerful enough and was struck down.
Sotha Sil's Legacy lived on as the Clockwork City continued to be powered by The Mechanical Heart after his death. The Heart finished being fully constructed by his machines 207 years after his death in 4E 200  However, in stories tell of a Forgotten Hero who followed a former Clockwork Apostle, Mecinar, into the city to prevent the latter from claiming the Heart's power. The stories has an unclear ending, where one rumor claims that the Heart was destroyed to strip Mecinar of its divine power so that the two can fight on equal ground, and as a result the city ceased functions and its inhabitants were forced to abandon the city. In another rumor, the hero is said to have used the Heart to harness its power and fought Mecinar on equal ground, and the Heart would live on, along with the city. The Heart was too much for the hero to handle and was disintegrated, with the hero's consciousness living on within the city.
- A Brief History of Ald Sotha by Varlinsi Arandu, Apostle of Sotha Sil — A short account of Sotha Sil's early life
- A Brief History of Ald Sotha — Varlinsi Arandu, Apostle of Sotha Sil
- Almalexia's dialogue in Tribunal
- Servant of Sotha Sil's dialogue in ESO
- Nerevar at Red Mountain — the Tribunal Temple
- 36 Lessons of Vivec, Sermon 36 — Vivec
- Divaricated Tone Fork item in ESO
- What is the Clockwork City? on the official ESO website
- Dialogue of various Stars in the Mnemonic Planisphere
- The Truth in Sequence: Volume 6 — Deldrise Morvayn
- The Mystery of Factotums — Associate Zanon, Clockwork Apostle
- 2920, Evening Star — Carlovac Townway
- 2920, Rain's Hand — Carlovac Townway
- 2920, Frostfall — Carlovac Townway
- 2920, Sun's Dusk — Carlovac Townway
- Events of ESO: Clockwork City
- Events of ESO: Summerset
- Dagoth Ur's Plans — Tribunal Temple
- Vivec's dialogue in Morrowind
- Mehra Helas' dialogue in Tribunal
- Aios' dialogue in ESO: Clockwork City
- Sotha Sil's dialogue in the mission The Last Stand in Return to Clockwork City
- Almalexia's dialogue in Tribunal
- Sotha Sil's emote dialogue in the mission The Last Stand in Return to Clockwork City
- Events of Tribunal
- Kellen's dialogue in the mission The City Falls in Return to Clockwork City
- Kellen's dialogue in the mission Journey's End in Return to Clockwork City
- Events of Return to Clockwork City