Harbingers of Ash
The Harbingers of Ash were an ancient order of gray dragons and their riders who were the Empire of Zhadun defense against the increasing depredations of chromatic dragons. Although gray dragons are chromatic, some aspect of their pact with the Ohbrinn brothers protected them from the madness that began to afflict their kin. Their members were mages and warriors beyond compare. Originally the riders were only dwarven, but in later years Eladrin, Elves, Drow, Half-elves, Halflings, and Humans were bonded with gray dragons. Rumors of a secret purpose afflicted the order for their entire lifespan, and they were slaughtered wholesale by Noquis when she replaced Kugrubal as the imperial deity and installed the Thuran dynasty.