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After all the Skills and Abilities I got, I felt slightly tired and exhausted, resting over my bed while deciding to take a nap. That transformation had made me slightly thirsty for blood, something I had not experienced ever since my reincarnation.
This probably means that this new form also gives me the thirst of a vampire, it fully transforms me into one, while as I am right now, I am only a partially a Vampire, only through a modified physique that has the benefits without the weakness.
But to fully obtain the full power of a Vampire, embracing its weaknesses through that transformation might end up being ideal.
It is a very strong transformation; my whole appearance changes and it resembles how I looked back in my previous life.
Perhaps the Blood King Talent was specifically designed to hold such power, and it was born from my own developed abilities, instead of being something that anybody with blood magic affinity could get.