Celestial / Cosmic
The world was created by Tiamat. Dragons and Dragonborn were born as the first mortals.
The world was first created by the dragon goddess Tiamat, eons ago. Formerly a nesting beast, Tiamat shaped the world out of the combined energies in the center of the elemental planes. In it, she filled it with her children, the dragons, and created servants for them, the dragonborn, to inhabit the world, the first mortals. Accidentally, the souls of these "mortals" she created contained the power of creation itself, ki.