This is the final step of the main quest.
Really easy fight, though I was level 43 when I fought him.
The gear I used was Ebony Boots, Ebony Mail, Daedric Greatsword (no enchantments), Orcish Gauntlets (13% two handed) and Volsung. All the gear is legendary.
Didn't use any potions or anything either, was going to if the fight was harder though.
Around 2:10 is when the fight starts.
![](https://s2.save4k.ru/pic/xkCAkfvN_dI/maxresdefault.jpg)