Harkon or Serana can grant this power during the main questline for Dawnguard.

They are typically pure-blooded vampires who have either received their vampirism through another pure-blooded vampire or Molag Bal himself. Vampire Lords are considered to be the paragon of the species. Now we can have this whole new mode, and new perk tree ideas started coming up, and then we got into the story.' ―Matt Carofano, Bethesda Softworks 'Vampires were something we didn't really do much with in the regular game. The power bite attack adds a unique cinematic where the Vampire Lord wraps its wings around the victim and bites them on the neck. Of the newly added spells is the ability to use consumed blood to vitalize the Vampire Lord and the ability to summon Gargoyles the way atronachs are summoned via the use of Conjuration magic. The Vampire Lord features eleven unique perks and two combat modes - Melee Mode and Blood Magic mode. Vampire Lords have an altered and sinister appearance, one that is more drastically and artfully constructed than that of a regular vampire.

Choosing the path of Harkon grants the ability to become a Vampire Lord, although it's still possible to obtain this form if the path of the Dawnguard is chosen. During the quest Bloodline, the decision between whether continuing to assist the Dawnguard or join Harkon and the Volkihar Clan arises. Vampire Lord is a power available in The Elder Scrolls V: Dawnguard, that serves as an extension of traditional vampirism. For the item set, see Vampire Lord (Online Set).

Skyrim becoming a vampire lord