The Council of Wyrms, led by Io, devised a plan to transcend their mortality, for millennia of life was not enough for them. So it was that thirteen ancient dragons ascended to godhood. The other deities did not take this well.
In a coordinated attack the other gods and goddesses attacked the newly formed Draconic pantheon and the nation from which they sprang. Atlantis was cast into the see, and the Draconic Deitieswere sealed away forever. Or so they thought.