This is what Su Ziyu currently understands about the situation.
However, there are still many things he is not clear about, such as where that ghastly substance called Human Pus came from, and why he would lose humanity upon entering this world.
This library holds no answers.
Ironically, it contains mostly records of something called 'Profound Darkness,' along with numerous chilling horror stories. The members of the Church are also very strange; they can actually gain casting abilities by reading these stories about past terrifying beings.
Is this a faith based on ideals?
By immersing themselves in these terrifying entities, do they acquire some of their special powers?
It's completely beyond comprehension.
Reading the Holy Scripture of Profound Darkness does not grant Su Ziyu any casting abilities; at most, it just gives him an eerie chill down his spine, perhaps because he simply doesn't believe in anything related to Profound Darkness.
