Daishain's D&D 5e: Side Stories - Page 24 The Sage says...
"A long time ago, I walked the same path that you do now. I started at a younger age though, having been born with the gift. Awakening the blood for more than just a few magic tricks is difficult, and requires sacrifice, but it can be done. I grew scales, my eyes changed, I was able to transmute my limbs, and then my entire body, for short periods of time. It took decades, but eventually, it took no effort at all to be a dragon, and turning back into this form became the thing I needed to use magic for."
"This outcome won't necessarily be yours, it is but one of many paths you could take, and is perhaps the least likely. There are advantages to this path, not the least of which is being able to do much more than a normal lifespan would allow. If there is a warning involved, it is that there are drawbacks to separating from humanoid society and living such a long life. The companions I started this journey with have long since gone to the heavenly realms, and there are times I wish I could join them and rest."
"As to the others, most metallic dragons who were born as such do mean well. They support the cause of Bahamut, protect and defend others, and fight evil where they see it. But they also 'know' deep in their bones that they are in many ways superior to the races they protect, and often have little sense of urgency."
"Protanther, the head of our council, is unfortunately an excellent example of this. Have you wondered why more of my kind have not involved themselves in this matter? It is in large part because he is convinced that this little cult composed of young races will burn itself out soon enough, that they're incapable of causing lasting harm. I can only hope that either he is right, or I can prove otherwise in time for them to intervene."