The Blasphemer's Crusade

The most powerful warrior ever, Derro, After defeating the Demon King, he became a blasphemer that was reviled by everyone. The most highly canonized saint of the church, However, the goddess sent down an oracle to worship the blasphemer as his teacher. The power struggle between the church and the duke, The world-destroying ambitions of the goddess and the devil, Where will the fate of this continent go?