I've studied magic for a long time as a sorcerer.
From the process, the advancement of sorcery can't be explained without relating to demons, and since they've fought against the goddesses, the field has been widened to the study of the goddesses as well.
While I was doing that, I learned of the field of accumulation.
It's an empty field. The theory of the beginning and the end is a fantastic library, at the boundary of transcendence, all for one purpose.