Balamaz Dreadscale

Not much is known about the black dragon kin that faced off against the Wanderers in the ruins of Lethgo, a once city of dragons and dragonkin. From the gathered information of a few lizardfolk and kobolds, he was said to be the most fearsome dragonkin in all of the once Uncharted Lands. Many kobolds, lizardfolk and grippli believed he was the avatar of Kal'thanos reborn. He apparently united the various black, green and red dragon clans in persuit of raising the old dragons to conquer avalon once more.

Outside of this we're not sure what else he acomplished, it should be noted that his body was never recovered as it seemed to decay rapidly once he was defeated.