The First Vampire

After transmigrating, someone discovers that he seems to fit the characteristics of a vampire.

The problem is, there are no records of vampires in this other world!

Could I be the first vampire in this world?

With no elders to guide him,

and no System to help,

he has no choice but to keep observing and recording how his body reacts in different situations to figure out what vampires are like in this world:

[Direct sunlight has no effect on my strength...]

[My throat, heart, and brain are no longer fatal weak points...]

[I can survive and retain my strength indefinitely without food, water, sleep, or even blood...]

[I can suck blood from a distance, turn into mist or a bat, walk through walls, become a shadow, grow stronger the more blood I drink, and even take other people's lives as extra lives...]

P.S. The main storyline is about competing for lordship. Being a vampire is just a golden finger he can keep developing, so proceed with caution if that's not your thing.