'Verse - Civilization - Dragons

'Verse - Civilizations
The Civilization of Dragons are the most dominant apex species on Arca during its prehistory. 
First signs of dragon civilization were during the Age of the Skies; the dragon-kind began to congregate and settle on Kiihlek (Arca's only sky-continent). These dragons were winged, four-legged and had intelligence comparable to ancient humes. 
The coherent Svanthaazil civilization was born during the Age of Magic where Dragons began to learn how to utilize the Aether and teach other dragon-kinds (the serpentine dragons in the seas of Arca and the winged and feathered serpentines on the surface of Arca) the magic of Aether.
The Kingdom of Svanthaazil was the dominant civilization of Arca, the dragons quickly expanded the city of Kiihlek to surround the Lake of Kiihlek.
During the period of Kiihlek Republic, The majority of dragon subspecies were united, there were school of learning and it was a golden age. 
They began journeys into other worlds using newfound knowledge of the god gates. They utilized the god-gates to acquire more knowledge and many various species. 
Then one day, an ancient prophecy of Svanthaazil had come true, a species named Av'ee came flooding out of the god-gates and began to spread across Arca. They brought with them the religion of the Lightbringer. Both species saw each other as enemies (Dragons saw Av'ee as invaders and Av'ee saw Dragons as corrupted evil beings). 
Centuries long war began and the Dragons were afraid of the second part of the prophecy. It had foretold that a cataclysm was coming for Kiihlek. It came true about 460 years into the war; an asteroid 45 km in width was heading their way. The asteroid was captured by Ulor'yn's gravity well and was tugged into Arca's orbit. It was unfortunate that the asteroid's collision path lined up with Kiihlek. Massive armies of Lightbringer Av'ee began to blockade the majority of god-gates to prevent the dragon-kinds a way to escape the impending cataclysm. Their only way out was three closest god-gates which energies had already been spent trying to move Kiihlek out of the path of the Asteroid. 
It wasn't enough. The asteroid impacted with the floating continent of Kiihlek, shattered it into pieces and continued on to impact the surface of Arca. The impact with the ground sent a cataclysmic waves of fire that engulfed the world of Arca. The Av'ee that remained had sacrificed themselves to cleanse Arca of dragon-kind.