Board Thread:Lore Discussion/@comment-168.10.63.245-20140910181524/@comment-9212235-20140922220519

The CoC completed a process known as mantling where a person follows in the foot steps of another and becomes him, and in return the mantled person becomes the mantles as well. This is why Sheogorath in Skyrim says I am him and he is me.

The old Sheogorath returns to his true form as Jyggalag.