Board Thread:Lore Discussion/@comment-170.211.170.15-20140505220009/@comment-13446185-20140506023213

I wrote it and my head still hurts. But to answer your question, the Oversouls are created through a process known as the Enantiomorph. The Enantiomorph, in a basic sense, is when two equal but opposite forces collide togethor and one becomes the other or creates something new or something like that.

The best example of this is Anu-Padomay

Anu and Padomay are two completely contrary forces (A Yin-Yang scenario)

They birthed there souls (Anuiel-Sithis) and with there souls formed the Aurbis

Enantiomorphs also apparently require a third entity to be completed but I'm not going to get into that right now.

The first oversoul was, according to my knowledge, Talos Stormcrown, who was created when Wulfharth visited Hjalti at the battle of Old Hroldan. The second would probably be Tiber Septim who was created when Talos and Zurin joined as a new entity. The Underking was the last formed, which seems to be Wulfharth and Zurin.