Kokuma Musou黒魔無双; 黒魔無双～堕ちた聖騎士と復讐の黒魔道士～; Kokuma Musou - Ochita Seikishi to Fukushuu no Kuro Madoushi; Black Demon Musou ~The Fallen Holy Knight and the Revengeful Black Mage~; 黒魔無双【コミックス版】; Black Magic Unrivaled

A sorcerer of black magic rises from the depths of hell to take revenge on the hero who betrayed him and his comrades in arms. However, the sorcerer could not defeat the hero and turned into a poisonous mist that poisoned the World Tree shrine. But a holy girl manages to resurrect him, will the sorcerer be able to avenge him?!!!