Since my other oldie does not have her lore written yet (it's in my head just have to formulate it haha), have an old 4 digit fire boy.
More Generalistic:
Diablo is as old as the lore of Flight Rising itself, back when the Flamecaller first came to power and declared her stronghold of The Ashfall Waste after her great return along with the other 11 Gods. Born of one of the first droplets of magma spilled onto the barren cracked wasteland that is now known as the Great Furnace, he wondered of his true purpose for being given life regularly. That was when he met Whirlpool, an outcast due to her being born with the Tidelord's mark of the vast sea. She had spent several months wandering between the two territories, a dragon with no Flight and no God. That was when it dawned on him: Who ever said that Flights could not coexist? Why must we be separated? Why must we shun those who are not of our dear Mother's blood? Because their Parents were at each other's throats? No. That was their fight. It was at this moment that he decided. The strongest clan would exist not of purely our own Flight, but a melting pot of others. And that strongest clan would be his. One where the strong may rise, the bonds between family would be great, but most of all where Flight meant nothing. This was the dawn of a new clan. LifeBlood.
Vita Sanguinis.
The prologue-esque thing of the book like thing I'm writing:
During the creation of this world, life sprang from the Eleven's very bodies, giving rise to new lands and territories each with distinct characteristics that segregated them from one another. The blood of the Tidelord became a vast sea which boasted armored behemoths and plentiful food sources. The hide of the Icewarden became a crystalline and fragile foundation that gave rise to heavily furred packs of hardened species, and the fur of the Gladekeeper created a jungle of prospering organisms, masters of camouflage constantly evolving. At the time of the conception, the Flamecaller shed her blood and body to give rise to the first born children that would rule the land while she and her brethren would be in deep slumber. The land blackened with the smoldering flesh, and gave way to molten magma that bubbled up from below the cracked earth. Her blood morphed into various shapes and gradually gave way to life upon the land. It was in this way that the first dragons graced the world. From one of these many scattered droplets sprang a bloody red giant, dubbed a Guardian by the Tidelord in later times. He looked down at his claws as he rose from his slumbering position in an almost curious manner.
'What am I?'
'Why am I here?'
As the simple sentences danced in his mind repeatedly a voice echoed from within.
'You are one of the firsts, my child. Go. Bring glory to your parent. Find what it is you seek.'
He was calm as he spoke to the gentle elder,
'What is my name?'
'Diablo. Ruler of the Evil that may befall our Flight, and the one who brings justice to them.'
The giant blinked up to the smoky hazy sky filled with the smells of burning destruction and the roars of the newly born, revealing smoldering eyes that had a spark of light within. He then set off at a lumbering pace, beginning a quest to find himself, and his purpose for living.