Io - the word shaper

Asgorath (pronounced: AZ-gore-ath), is the dragon deity of creation. They were regarded as the creator of the multiverse and of dragonkind, and they manipulated the destinies of all dragons by operating in a way that nobody suspected their involvement. Asgorath was supposed to encompass all alignments, but was often regarded as neutral, and their holy symbol, an unadorned circle, represented totality. Some sages believe that Asgorath was an aspect of the World Serpent concept,7 while others thought Asgorath was actually a primordial that had ascended to godhood after the Tearfall.8note 5 It was even possible that Io was similar to Ao, a kind of all-powerful yet detached overgod.9

In draconic mythology, Asgorath created the multiverse itself, although his role in the creation was mysterious and couldn't be understood by mortal minds. According to those myths, Asgorath existed before the multiverse, in a place called "the first void", that was different from the "shadow void" from which the multiverse arose after Asgorath willingly shed his blood to give the potential to exist to all creation.3

The "Blending", a creation myth popular among half-dragons, told about how in the beginning all the potential for "existence" was enclosed by a "shell" of nothingness and darkness. Asgorath was born in the boundary between the "shell" of nothingness and the "yolk" of existence, and saw all the things inside existence waiting to be born. Asgorath then decided to grow in size, until he blended with both existence and nothingness, and then began to spin, slowly at first but progressively quicker, until he created all worlds and stars. While he was spinning, streaks of color and metal appeared and became two different rings that also spun and transformed into Bahamut and Tiamat. After that, dragons were created, followed by other living creatures. However, a small bit of nothingness remained within Asgorath. Half-dragons believed that Asgorath was still spinning but he was slowing down, and when Asgorath eventually stopped all of creation would be returned to the "egg" of nothingness, where Asgorath would sleep among potential new worlds.19

Dragonborn of Abeir also had myths about Asgorath, though they knew him by the name of Io. The few dragonborn that believed in gods, believed that Io was the one who created them, though there were many conflicting traditions on how the event happened. Some stories tell that Io created the dragonborn at the same time he created the dragons, establishing a natural order: dragonborn were created to serve dragons. Other stories said that Io created the dragonborn before the dragons or any other humanoid race existed, as the pinnacle of perfection the other gods used as inspiration to create the humanoid races, pale imitations of dragonborn. There was even one story that tell dragonborn weren't created by Io, but instead were born of his blood when Io was killed in the Dawn War by a primordial named Erek-Hus.11