Transition from the Second Era to the Third
The Second Era of Eatherus is not necessarily well documented, as most of the records of that time were lost when the western realm made the transition from the Second to the Third Era, or remains in regions of the continent that are to this day considered too dangerous to venture into given the fey magics and corrupted beings that reside there.
The transition, however, was well documented by two different races. The first were the Illithids, one of the three major races from the second era, as they were impartial observers to the other two, the Seele and Unseele. The second were the dragons that acted with some freedom within the two Fey Court's realms, allowing them to be spread far when the Calamity struck.
The Calamity itself was the primary reason of the turning of the age, and the reason the fey no longer hold sway over the lands. For the two courts often waged war on the other with the Unseele holding the cold lands to the North and the Seele holding court over the warmer climes in the south and to some degree, into the expansive desert to the south-east. But in the last century leading up to the Calamity, they warred with such ferocity that entire client and slave races disappeared or were so devastated that they would not be seen for centuries more. The war continued on with neither side truly gaining advantage over the other until on one day they unleashed such terrible magics that forces from all corners of the Realms entered the world and clashed for a mere two weeks. But such was the battle that the homelands of both courts were consumed by war and devastated, gleaming capitals reduced to ruins.
But quickly as the Calamity had come, so too had it gone. When the dust had settled the remaining races were free, but there was much rebuilding to be done and it left voids of power, allowing for expansion of previously suppressed races such as the dragons and their lesser kin, the dwarves, the orcs and more.
But what of the Illithids, the enigmatic race that watched this unbelievable bloodshed? They remained mostly intact, for it was not their bid to enter a conflict they were neither prepared for or capable of waging from their isolated island in the arctic north-western seas. And whilst they come from time to time to research the many wonders of the world, they oft' kept their nose out of the fledgling nations' business until much later.