Former Strongest Sage Matthias's fight to protect mankind continues, with the demons launching all manner of attacks to destroy everyone with knowledge of their plot to weaken humanity through misinformation about magic! To rout the demons who are hatching a plot involving the Dracopulse Line that runs beneath Maze City, Matthias must contend with the corrupt lord of the city and a trap-happy demon who lies in wait underground!

Volume 9 of the The Strongest Sage with the Weakest Crest manga series by Shinkoshoto.