In fact.
After witnessing the anomalies akin to future technologies during the Tower Master's ascension to level 6.
Levi felt that there must be a powerful mechanical civilization existing in this world.
According to the Tower Master's introduction.
Currently, the path of mechanics within the Sauron Plane is all created by Machine Sage Madison.
This individual's origin is mysterious, equivalent to the strength of a ninth-circle Grand Wizard.
Moreover, he is listed as a "Fellow" by Sauron, the foremost powerful entity of the Pan-Plane.
The round table mentioned that Sauron doesn't choose "Fellows" based on their realm, but rather values their potential or their contributions to the creation of new transcendent systems.
Figures such as the Arcane Emperor and the Origin Holy Emperor, and the Machine Sage all possess just level 9 strengths, but were chosen by Sauron.