Sinister Yin Blood Corpses were a type of devilish corpse recorded in the corpse refinement tome that Han Li had obtained from Old Devil Qian. There was no actual refinement method recorded, but it did mention that this blood corpse was extremely powerful, yet the refinement process was very vicious. It was said that in order to refine this devilish corpse, one had to use a body with the same bloodline as their own. Only then would they be able to use the power of their bloodline to repress the backlash from the blood corpse.

During the refinement process, the soul of the body being used would be trapped in the body for eternity without being able to pass on to the afterlife.

Cultivators didn't hold blood ties in as high a regard as mortals, but there were still very few cultivators who could do something so heinous and obscene. It was rather peculiar now that Han Li thought about it; even if there were some extremely cruel cultivators who managed to refine such blood corpses, all of them suffered extremely gruesome fates, with none of them living out the entirety of their natural lifespan...

As such, there were many evil cultivators who yearned for these powerful blood corpses, but there weren't that many who dared to actually refine them.

At this point, there were almost no cultivators...