A brief description of the Kouryakuhon O Kushi Suru Saikyou No Mahoutsukai ~< Meirei Sa Sero > To Wa Iwa Senai Oreryuu Mao Tobatsu Saizen Ruuto ~ manga:
Magnus, the magician who constantly hears from the heroes the words “shut up and follow my orders” because of his “worthlessness”. Once, having left his group and breaking up relations with her once and for all, he meets a merchant who sells him a mysterious book.
It turned out that this was a book written in the language of the gods, the Book of Peace, in which there was a ton of useful information on how to defeat the Lord of Demons ! Thanks to her, Magnus was able to recognize the weaknesses of bosses and increase his level much more effectively.
He also learned a lot of information about important personalities and various strange, and no, places in the city! With this book in his hands, using his mind and logic, he has a chance to surpass a group of heroes and go his own way to defeat the Lord of Demons! Magnus was not chosen by fate to become heroes. That is why he is going to defeat the Lord with his own forces and mind in order to save the world.