The Duke is so good at magic RAW novel

A strategy game based on medieval fantasy called “Era of Empires”.
After failing several times in the final scenario of saving an empire that was destined for destruction, he was a different person when he opened his eyes again.
A character who had brilliant talent but died due to the machinations of his older brother, who was jealous of it.

In order to survive, you must overcome your predetermined fate and save the empire.