Beyond Death | Vampire Lord path TES V: Skyrim - Dawnguard Guide
Last update: 11 May 2016
New primary objective: Find Valerica
After you reach the world of souls, follow the main road forward. On your way you will come across a soul with which you can speak and a couple skeletons which you need to defeat.
Eventually you will reach a castle with a strange barrier, where Valerica is imprisoned.
After a short conversation with Serana, the vampire will speak to your hero. Regardless of the choices you make, you will receive a mission of freeing the woman.
New primary objective: Kill three Boneyard Keepers
In order to get rid of the barrier, you need to kill three Boneyard Keepers who will be marked on the Soul Cairne map. They're quite far away from each other, so before trying to take them on you should get a hold of the undead mount by completing Find Arvak's skull in the Soul Cairn. Its description can be found in the chapter dedicated to side missions.
In order to reach one of the Keepers, you need to stand on the glowing circle.
That way you will be moved to an island where the undead warrior is waiting for you. After defeating him, go up the stairs and use the teleport to return.
New primary objective: Kill Durnehviir
With the last enemy dead, the barrier will disappear. Head to the other side and speak to Valerica. The woman will lead you to a big square, where you will be attacked by a dragon named Durnehviir.
Fighting him is just like facing other dragons. The only difference is the fact that the beast calls in small groups of undead skeletons from time to time, which you have to take care of as soon as possible. Return to attacking the dragon only after they're dead.
New primary objective: Retrieve the Scroll and return to Tamriel
After it disappear, speak to Valerica and take the nearby Scroll.
With it in hand, you need to return to Tamriel by following the same route by which your came here.
After you leave the square, you will meet with Durnehviir once again. The dragon will teach you a Shout thanks to which you will be able to call him to aid you in battle. Bid the beast farewell and return to the normal world.