>>/1834/
I checked my grimoire, I know what it is now:
Using the universal levels map of 16 levels counting from the highest at 1 and downward to 16, we get
> 16, despair
> 15, denial of your true nature
> 14, hedonism

The pile of dead bodies which was the offering, was "despair", that's the panic I felt.
The girl hiding her body under a blanket, that was "denial of true natire".
The girl showing off her body and then engaging physically with me despite there being a war going on, that's "hedonism". 

Hedonism is the absolute lowest beginner level when trying to create something, before that it's not a sustainable existence.

 >>/1727/
This here could be using the same kind of number system, with the title "the grimoire of zero" (Zero being a name) meaning the grimoire of absolute control at the top above 1. While 13, the sorcerer who caused a lot of shit in this story, correctly refers to "dictatorship by arbitrary rules" in the map.