The Elder Scrolls, I Live as a Legend in Annihilation

Caius never wanted to be a hero. He just wants to live his life. But the empire he once served is collapsing, the world is coming to an end, and fate has chosen him to succeed where everyone else must fail. A wave of doom unprecedented since the dawn of time swept across the land, forcing him to grapple with the collapse of his empire while also facing his own monstrous, ever-increasing hunger. He is cursed and a vampire; if not for Viconia, he would have faced the coming darkness alone.