Board Thread:Lore Discussion/@comment-13436964-20130726062712/@comment-5424581-20140806082948

Roadhouse699 wrote: The Hero of Kvatch does meet the dragonborn in the quest The Mind of Madness. He becomes the Madgod at the end of the shivering isles questline in oblivion.

However, the Hero of Kvatch took an oath as a blade to protect the dragonborn... that's one fault in that quest. I think becoming a madgod overrules that oath.