Max out
Spoiler
looks like you need an elder scroll. It might be a new one acquired through the Dawnguard questline, or the one acquired at the end of the vanilla questline. If its the vanilla one, then you're going to have to pretty much beat the MQ in order to get it. I don't think you'd want to do that more than once.
Todd has already stated in his Skyrim playthrough when asked about DLC before Skyrim was released. He said that we will need the Main Quest COMPLETED. Aswel that I have completed two suitable characters who are both Vampires ironic enough... To be honest when you beat the game it is still fun but Vampires add a slight challenge... And who doesnt love Crouching right in front of someone lol
