The Dargean's are an ancient race of a once vast and advanced civilisation. Harnessing the untamed magic of the world they were master creators and forged the world in their vision.
In an age long past, the world was a warzone for deities and beings of the outer planes. A chaotic place of creation and destruction in seismic, but equal, strokes. The Dargean's slowly changed this, controlling and containing the magic wrought in the world and systematically banished many powerful creatures to their planes of origin.
With this banishment, the potency of magic dwindled, and the power of the Dargean faded with it. But with the Greater Demons, Angelic Sentinels, and other creatures uninhibited by time, wiped from the world, a stability took hold.
The world became more calm, change was far more gradual, and the Dargean's built an empire with the soul purpose to harness magic to seal off the outer planes. The elements that the very world was forged from aided them in this, providing anchors to which their planar devices could take hold and keep the balance in check.
Such manipulation of the world took enough power from the Dargean race, that their immortality finally left them. They could no longer resist the inevitable grip of death, and their numbers began to dwindle.
It is unknown how many remain. They lay dormant in their fallen empire, ready to destroy any who wish to siege the gates to the outer planes.