Summary
the Dragonborn Agnoron saves Serana at the cost of his own life Serana in a deep depression soul traps him and goes to the soul cairn to deal with the Ideal masters but Durnehviir offers a alternate way the Reaper one of the ideal masters of that lives in the soul cairn. The Reaper accepts to help but at the cost of Serana's vampire blood, and the side effects of the weapons.