User blog comment:Blood Reaper/Skyrim Dawnguard Trailer/@comment-4353017-20120601103506/@comment-82.27.211.248-20120601121608

I really doubt that It'll in the end turn Skyrim into always night time, you'll probably get a power to put out the sun and enhance your Vampire Abilities, or maybe you need to be in Darkness to transform into a Vampire Lord. That or Vampires are not very smart at all.