The Vampiric Knight

(y/n) is a half elf who was trained to be one of the greatest warriors in his kingdom since a young age. Love by his people of the kingdom and was childhood friends with princess Rose. Both loved each other but she had to go arrange marriage with another kingdom to keep her kingdom safe. But the evil king of that kingdom also known as the Deacon the conqueror lied and attacked (y/n)'s kingdom. (y/n) tried to save it but was killed by the Deacon with a special formula that he hope would do something besides killing another. It didn't work and (y/n) was dead or so everyone thought. (y/n) came back but cursed with vampirism and vampiric power but still retained humanity. He now is going master his new found powers, save his kingdom, reunite with rose, and get revenge on the one who cursed him.