Shinen no Majutsushi - Hangyakusha to shite Yuuheisareta Ore wa Fushi no Karada to Saikyou no Chikara wo Teniire Boukensha to shite Nariagaru

Synopsis:

This corrupt world will be transformed by a justice wizard! The Cyrus Empire's court magician, Wim Abel, is imprisoned in a dungeon with a strong barrier that prevents him from escaping after being wrongly accused of betraying the empire by the upper classes, who are afraid of his immense power. But Wim, who possesses enough strength to terrorize a whole nation, manages to get out of the dungeon that was thought to be unreachable. His goal is the Kingdom of Leoria, a "perfect meritocracy," according to some accounts. …However, in reference to the Cyrus Empire that exiled Wim—-?