Light and Dark Night

After traveling into the body of a weak nobleman, Marvin found that he was very familiar with this world. This was the game he played in his previous life and... Damn it! He is only six months away from the catastrophe! As a former top player, he's obviously going to fight to save the world... Yeah, no. It's time to plan and prepare for upcoming events, it's better to use this knowledge to achieve success rather than fighting with God