Such was Calvin's chance, just like Nathan Lane and Little Ghost Gregory Ryan. This great opportunity in Casterly County had been hidden in the Mountain God Temple for thousands and tens of thousands of years. Even when the temple was built back then, no one had found it, but it somehow fell upon Calvin's head.
It was both accidental and inevitable.
David had detailed to Owen Bertram the pros and cons of the Saint Blood Refining Method. The former Innate Spirits were born into the world naturally. In their minds, there was no distinction between "good" and "evil," because in that distant era, there was no established moral system.
What they possessed were only various instinctive desires.
So refining Sacred Blood would infinitely magnify these desires within oneself. The power of Sacred Blood was too strong for ordinary beings, and the corresponding "desires" would be very strong.