Lord Harkon

"In an age long forgotten to history, I ruled as a mighty king. My domain was vast, my riches endless and my power infinite."

- Lord Harkon on his past

Once a powerful ruler, Lord Harkon began to fear his own mortality and struck a deal with the Daedric Prince Molag Bal. After sacrificing a thousand of innocents to the Daedric, Molag Bal granted Harkon immortality, turning him and his family into pure-blood vampires.

At some point, Harkon began to uncover an ancient prophecy called the Tyranny of the Sun, that, if enacted, would blot out the sun and allow his kin to roam freely during the day. He started becoming obsessed with the prophecy and everything in his life, including his family, was pushed aside to try and make it a reality, causing a rift between him, his wife Valerica and daughter Serana.

To enact the prophecy he required the ancient artifact called Auriel's Bow and the blood of a Daughter of Coldharbour. He would then put the blood on an Elven arrow and shoot it at the sun with the bow. Harkon wanted to use Serana, as a source for the blood, as she is a Daughter of Coldharbour. Valerica saw how obsessed Harkon was becoming and disagreed with his goal. She believed that vampires should stay in the shadows otherwise it would bring too much attention to their kind, and that mortals would wipe out the vampires, attempting to bring the sun back.

In an attempt to stop him fulfilling the prophecy, Valerica locked Serana along with an Elder Scroll in Dimhollow Crypt for her protection and escaped to the Soul Cairn with the other scroll. Harkon, enraged by this betrayal, commanded every vampire in his court to look for them. After the Last Dragonborn found Serana and brings her to Castle Volkihar, Harkon regains the confidence to continue his quest to fulfill the prophecy. But eventually got slain by none other than the Dragonborn and Serana.

As a pure-blood vampire, Harkon posses all normal vampiric abilities as well as a powerful Vampire Lord form. While in this form Harkon becomes more bestial and gains access to Blood Magic. While in his normal form Harkon carries his own personal enchanted sword that allows him to absorb the health, stamina, and Magicka of his enemies.

Battle vs. Miraak (by Dargoo Faust)
TBW

Expert's Opinion
TBW