Tens of thousands of years ago, the Dragon Aspects' Army was granted authority by the Titans, becoming a new force outside the Guardians' system to oversee and maintain the world.
But they were still mortal creatures at their core. The passage from mortality to transcendence required the tempering of time, and during that process, the Black Dragon King became a victim of certain beings hidden beneath the world's darkness.
He saw the Titans' cold, merciless side. He regarded his own mission as a tragic shackle, and guided by certain voices, he began to rebel against these shackles that had never truly existed. He thought he had chosen a path toward freedom and a new era. He thought that after the destruction he orchestrated, a brand-new era would follow.
But that was not the case... the Old Gods merely treated him as a weapon to attack the Titan World-Soul... they would not even grant him freedom of thought. Deathwing had simply been played.
He thought he could master everything, but in truth, he could not even master his own fate. As Dick had said, in a certain sense, he was a pitiful coward.
But regardless, that was all in the past. Deathwing's era was over. Beneath the spreading light of judgment, the all-devouring Chaos Dragon Aspect, together with the vast Ogri'la Highlands, vanished into the cycle of history.
The chaos at the source of their bloodline had been dissolved and slain, and the black dragons already tainted by chaos regained their freedom as well, even though chaos still spread through their blood.
But that was only temporary. Alexstrasza's Red Dragonflight had been researching the purification of black dragon eggs all along. With the source of chaos Deathwing had forcibly added to those eggs extinguished, those black dragon eggs would inevitably escape