The Strongest Sage with the Weakest Crest #15

Plot

Evil demons have sown disinformation and confusion about crests and magic, and now, Matthias is out to stop them from destroying humanity!

The shadowy figure behind the army of wooden automatons is an archdemon calling himself Grevil, and he's out to-what else?-destroy humanity. However, Matthias knows Grevil as a capable and beloved human king from his past life! How did this ancient ruler become a demon? It'll take some pulse-pounding battles to solve this mystery!!