100 no Maseki no Daikenja

Talentless at combat, sixteen-year-old Tori supports his sick brother and his two younger siblings with the only thing he can: Utility Magic. He does all this while hauling gear for adventurers who despise him. Then a talking, mustachioed magic book left by the legendary Great Sage chooses him, revealing how to harvest magic stone crystals worth 100 times the norm—no killing required. With Utility Magic as his secret weapon, the guild's errand boy begins his rise. It’s time to corner the magic stone market.

Official Translations:
Korean: Naver Webtoon, Naver Series
Others: English, French