[Cthulhu + Mild Horror + Survival + Students + Ordinary Protagonist]
A school bus driven by paper figures carries a group of chosen students to an abandoned hospital...
In the world of secret arts, bloodline determines one's rank.
Bloodlines are ranked as purebloods, mixed-bloods, mongrels, and mudbloods.
Those without a bloodline can barely cultivate secret arts and can only serve as sacrifices in one dangerous ritual after another.
Xue Quan, who has no bloodline at all, unexpectedly gains the power of Shadow Corrosion.
Now he will challenge the bloodlines of the gods as a mere mortal.
The ritual begins.
