Iron Dragon's Advancement Journey

On the continent of Faerûn, besides the well-known metal dragons, chromatic dragons, and rare gem dragons, there is also a fourth type of dragon race with numerous subspecies. They were the true rulers of Faerûn in the past, the shining light of the true dragons...
Now, they have fallen to the point where they can hardly maintain the continuation of their race. They have completely faded from the sight of the major races of Faerûn. The five subspecies can only surround the wings of the Supreme Dragon. Even those from different factions are closely connected and stick together for warmth. They struggle to survive under the malicious gaze of the two most famous dragon gods of Faerûn.
They are the Atheros.
The story begins with a tiny iron dragon cub from the Iron Dragon race.