Born

Using the Medial Upper Tribes control over the Inferior Upper Tribes, it was only logical that their subordinates would be swept under Dyon's control. By extension, the named and numbered tribes under them all also fell under Dyon's fist. 

The battle that ensued with the Superior Upper Tribe wasn't even worth mentioning. 

Dyon had prepared well for them, taking the whole of their subordinate Clans under his wing and organizing and equipping them all, he even took the vanguard of the attack. On top of this, Dyon had planned on using the explosion type stones as a final trump card in case things didn't go his way. But who knew the mighty Superior Upper Tribe was snap like dead wood. 

Despite their having the best warriors and largest population of the Region, the assault of the wyverns was too much for them to handle. There was a reason even they didn't dare to venture into the mountain range.