User blog comment:Madman97/The Aedra Vs. The Daedra theory/@comment-3025184-20131010203442

So, this is what happened. In the First Era, a radical sect of the Alessian Order called the Marukhati Selectives wished to "edit" the gods, if you will. They wanted Akatosh (Auri El at the time) to take on a more human personality, since the Alessian order hated Mer. They danced on one of the towers holding up Mundus, and thus, the Aka Oversould split, creating Akatosh. Other aspects of the Oversoul include Aka-Tusk, Alduin (yes, Alduin) and Auri El. Its not what floats my boat, it is proven lore.