Io

Asgorath, more commonly known as Io, was an overgod and the dragon deity of creation in the Forgotten Realms Universe. He (or she) was regarded as the creator of the multiverse (all the realms) and of dragonkind. Io was similar to Ao, another all-powerful overgod.

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.

The oldest myths of dragonkind claimed that Asgorath manifested physically only once, during the act of creating the multiverse. Those who believed in this myth believed Asgorath was so huge, that even his scales were larger than the largest mortal dragon that ever existed.