Why Is That Vampire Covered in Holy Light?

What is it like to travel back in time into a game MOD you made yourself? Wait, this seems to be different from Tal's previous setting. And how come I, a vampire, have so much power of holy light in my body. Oh, my profession is Paladin, that's fine. "Holy Light, I just want to stay at home, suck blood, and do some side business to maintain the expenses of the castle." Tal looked at the mountain of corpses and sea of blood in front of him and sighed: "Why are you forcing me?"