Librarian, Starting with Extraordinary Achievements

I was just an ordinary librarian, but I unexpectedly gained the ability to edit reality. I wanted to develop my abilities discreetly, but the world forced me to become a god. The authorities see me as taboo, while the powerful revere me as a mentor. When the cataclysmic crisis descends, I close the book in my hand and smile calmly: "Don't rush, allow me to change a setting."