Asgorath

Asgorath, also known in the Outer Planes as Io, is the chief deity worshipped by dragons. He is supposed to encompass all alignments (being worshipped by every variety of dragon) but is most often regarded as neutral. His symbol represents totality. In draconic mythology, Asgorath created the universe itself and then dragonkind, that being the only time when he manifested himself as he hasn't done so since. He does, however make his existence felt as a powerful presence in the minds of other dragons.

In actuality, Asgorath was known during the Days of Thunder as Asgoroth, a female primordial, released from her imprisonment, along with the rest of her kin, by the Batrachi. Asgoroth would prove to be the downfall of her liberator's entire civilisation when she hurled an ice moon down to the surface of Abeir-Toril in an event known as the Tearfall, wiping out the Batrachi and creating the Sea of Fallen Stars. It was this action that finally spurred Ao to clone the planet, giving the original to the primordials, and the new one to the gods. The Tearfall also coincided with the hatching of a multitude of dragon eggs, giving rise to the worship of Asgoroth as a deity, her draconic followers believing that she (though they referred to her as a he) created their race.