Seth had noticed a consistent phenomenon across all races he had met so far.
And it was their abilities. Aside from class skills and gene skills, these figures always seemed to have something the humans lacked.
And that was a racial skill. Yes, not a racial trait but a racial skill.
His battle with the Bloodborne made him understand this more intimately.
Take the Rongols he met in the origin realm. When he first encountered them, he assumed the ability they used to win a battle he witnessed stemmed from their racial trait.
And he was wrong. He made that deduction due to poor information, but now that he knew more, he was certain that wasn't a racial trait.
Same with the Bloodborne — their innate ability to consume blood and use the blood energy in versatile ways, like boosting vitality so much that immortality wasn't impossible.
