"Why did a vampire evolve from sucking my blood?"
When she heard that question, the fairy queen gave an answer as if she had read it in a book. "There are multiple reasons. First of all, do you know what the vampire sucks?"
"Blood."
"Then what does blood contain?"
"Hmm? Red blood cells, white blood cells, or something like that?" Nathan tilted his head in confusion. "I don't know a lot about biology."
The fairy queen shook her head. "Your blood is influenced by your Ena and your soul. If you are a being from another world, it will change your blood as well. And due to your unique Ena that can summon a beast, we know that your blood is different from other people."
"That is weird." Nathan thought for a moment. "If that's the case, why would the one who discovered me to have Ena in my body consider me to have a tremendous amount of Ena? Meanwhile, I only had 60 Ena when I summoned my first familiar."
"60? What's with the number?" The fairy queen looked confused.
"Ah. This was my teacher's research. In fact, I was planning to give your hairpin to her. She had summoned all kinds of forest creatures, such as elf, spirit, dryad, and so on. I thought you would be compatible with her, and she was also a researcher, a quite strong one at that. But if you were not useful..." Nathan smirked.
"I see." The fairy queen nodded in understanding. "First of all, I don't have the knowledge about this measurement of Ena. Can you please fill in the information?"
"It's just a simple measurement of Ena by considering this Ena as particles. By taking advantage of this system, we will be able to measure the amount of Ena required in our ability, the core we swallow, and so on.
"I only get about 2 Ena whenever I swallow a proto-class core, but a genius can get 10 Ena from one core. I don't know the average, but we can probably assume it's 4 or 5 Ena per core."
"That can actually generalize a lot of stuff." The fairy queen closed her eyes for a moment. "If that's the case, I think I have two possibilities for you.
Nathan shook his head. "Nothing I can think of right now. Instead, how can the vampire evolve in the first place?"
"A vampire's potential is decided at birth. They will gradually increase their power by merely existing. Blood is a kind of catalyst that will speed up the process of them reaching their full potential.
"The blood itself has a strict qualification. First of all, you need compatibility. Drinking random blood will help, but compatibility will increase that effect by several folds.
"To increase their talent, or, you can say, evolution, they need to drink the blood of a higher being."
"!!!" Nathan widened his eyes. "Is that the reason you say I'm special?"
"Yes." The fairy queen nodded. "If your blood is not special, then I might have to search for another reason."
"I see." Nathan rubbed his chin, contemplating.
"May I know what was the vampire's talent before she evolved? How much did she need to evolve?"
"She evolved from a countess to a marchioness. I only allowed her to suck me once."
"Hoh?" The fairy queen squinted her eyes. "There had been several occasions in the past where vampires evolved. I even wanted to donate my blood to confirm it, but there was no vampire I could find back then.
"According to the record, there was a normal vampire that became a baron after drinking the blood of his summoner for two years. There was also a baroness that became a countess after a decade. You sure it took her a single time to evolve?"
Nathan nodded.
The fairy queen's expression turned solemn. "You might be more special than I originally thought. If you let her continue, she might be able to become a duchess, no... a royal? No, she might be able to become a progenitor."
"!!!" Nathan widened his eyes in shock. 'Risa becoming a vampire progenitor?'