The Strongest Sage with the Weakest Crest manga volume 27 features story by Shinkoshoto and art by Liver Jam & Popo (Friendly Land).

Matty and his friends begin the difficult task of mining the bodolite ore after slaying the Aether Dragon. Fortunately, there's plenty of ore to be harvested, but transporting and processing the precious ore is quite difficult due to the special nature of the bodolite and the marinite zone's flight magic prohibition. As always, Matthias has a plan, and whatever troubles may come, nothing will stop him from forging a transcendent sword!