Strongest Sage with the Weakest Crest 21

In this manga adaptation of the popular light novel series, the world's strongest sage will stop at nothing to get stronger... not even refining rubble! With the Boseil dungeon monster overflow sorted, Matthias gets down to business creating some jobs for his domain. The long-neglected dungeon may have created a lot of trouble, but it also yields great benefits, allowing Matty to incorporate his passion for resource harvesting and dungeon demolition into a new industry for Boseil. Once known for its delectable cuisine, Boseil will now be known for refining the finest metal ores!