The Strongest Sage with the Weakest Crest manga volume 10 features story by Shinkoshoto and art by Liver Jam & Popo (Friendly Land).

Is former Strongest Sage Matthias's fight to protect mankind finally over...or is it just beginning?! Having destroyed the demons that menaced the Kingdom of Eis, Matthias sets his sights on a powerful demon lurking abroad! But in order to enter territory containing ancient magic devices, Matthias and his party will have to raise their ranks via the Adventurers' Guild. Of course, Matty has his own special ways of getting the job done!!