We don’t know much about The First Creation and the little we do know is a bit sketchy. The only facts we are certain about are the following:

• After the first creation, the chromatic and metallic dragons were nothing more than small semi-intelligent animals, sometimes taken in by humanoids as pets. The real dragons were shapeshifting magical creatures that, in their true form, resembled gargantuan winged lizards with scales that glimmered like gems. The mightiest of those were the Aquamarine dragons, a noble and benevolent race. Dragons were the sole creation of Osric, then known as Azaron. Dragons were therefore often referred to in literature as the sons and daughter of Azaron the First (e.g. the first true God, since The Core is considered a force rather than a living, breathing entity).
• At some point humanoids grew in power and became arrogant and powerful and proclaimed themselves gods of the land. This did not sit well with the true Gods and especially Osric who decided to bring this world to an end. He came before the trembling mortals, slew their arrogant leaders with a wave of his hand and proclaimed their eminent doom. Dalanos, not a very popular deity at the time, took pity over mortals and tried to convince his father to give humanoids one more chance. After the humanoids cried out in fear and desperation Dalanos stepped forward and explained that indeed there will be widespread destruction but some will be spared. The survivors will be tested and would have to prove themselves to the Gods as worthy to continue living on this world. And thus the world ended and the few survivors witnessed what we now refer to as the Second Creation.