Void Dragons

The Void Dragons were a group of elder draconic propheseers and architects who fled to the Dwarven continent of Hexrock, taking refuge within their most ancient and deep halls during the rise of the Arcktemperthae.

They had grown angry with the hubris of their lesser kin and sought to undo the unbalance they had created in the world by unleashing this threat, creating many great prophecies over centuries passing, but also designing and always refining their intricate plans. Through their prophesizing and the designs for a weapon that would trap and kill the souls of all dragons caught within its blast, the Void Dragons would ensure the draconic imperialism of the era would come to an end.

Unfortunately they had no eggs, and so when the Zatvok, the derived weapon of their initial designs, functioned and destroyed all but every Arcktemperthae draconic spirit, they allowed themselves to lose their grasp of arcane energies and their souls passed from withered bodies into the worlds beyond, and their Dwarven compatriots and students wept for the loss.

The Zatvok was derived from principles of design laid down the Void Dragons; instead of trying to banish a spirit the idea was to trap it in a transfigurative petrification of its own body, preventing it from reincarnating or leaving that body for another as was the want of the Elder Dragons and the Ecthakyr (the rebellious leaders of the Arcktemperthae who were also Elder Dragons).