Onaga:
Morichando, a proud warrior and leader of the Garaath tribe, a small, but noble group of elite warriors, was overjoyed when becoming the father of a beautiful baby boy, naming him Onaga, or Leader of the Dragons, since the tribe honoured the groups of wyvern creatures that habited the woods in which they resided as well. Many cheerful years passed.
One day, curious little Onaga ventured into the forest whilst in play with a little friend, but got lost and found himself roaming the inner depths of the dark woods. He came across a group of dragons, who were not pleased with his coming. He was forced to drink the blood of the wyvern leader, which caused him to hideously mutate. The boy then found his way back home after a daring escape, but was rejected by his own father. Now, with newfound powers, Onaga will dominate Outworld and have his revenge on the clan members that left him to die that cold winter's day.
This is what happened a few thousand years ago, just before his first reign began