I've played the main quest of Oblivion many times, but I'm still confused by Mankar Camoran's monologue about how Dagon is not invading Tamriel, but rather reclaiming it. How is this? I also hear the name 'Lorkhan' mentioned several times during his speech, too, but I'm just confused. So I have a couple of questions.

1. I've never managed to find an explanation of who/ what Lorkhan is. Who/what is he?

2. How come Dagon is trying to reclaim Tamriel? Why do the Divines have it instead of him? And doesn't he already have his own plane of Oblivion?

3. How could Mankar Camoran know any of this?


Thanks.