Failure Frame: I Became the Strongest and Annihilated Everything With Low-Level Spells (Light Novel) Vol. 3

After defeating the strongest human in the world with his "useless" spells, Mimori Touka's quest for vengeance is back on track! He knows he's still too weak to defeat the foul Goddess, so he sets out to find more information about the Forbidden Magic that could be key to taking her down. His search will bring him into the path of a corrupt duke, a fierce beastwoman gladiator, and a fighting tournament where the stakes are life and death!