Artixerxes (Main Timeline)

"He is a titan, nearly the size of Morgoth. No, scratch that, he's bigger than Ancalagon. He could probably kill the dragon in the same amount of time it would take you to figure out what to do." - AI DUNGEON. Silmarillion x Elder Scrolls Crossover - The Final Confrontation by Cheafpic.

Artixerxes is a Dragon that served under Morgoth Bauglir during the First Age.

Origins
Initially a Maiar of Melkor, the name Morgoth took before being evil. Artixerxes was one of his most loyal Maiar servants, helping him from defending the fortress of Utumno during the Years of the Trees.

Melkor never tried to turn Artixerxes into a Balrog like he did with his other Maiar, Gothmog. This is because he was spawned from the void like Ungoliant from the Music of the Ainur.

Trivia
Artixerxes was as strong as Second Age Sauron with the Ring which means he can match late First Age Morgoth.

Artixerxes never called himself the father of Dragons despite him being the first Dragon to ever exist on Arda.

Unlike Ungoliant, Artixerxes was completely loyal to his master and his two sons Glaurung and Ancalagon the Black