Bastard!! Ankoku no Hakaishin (ONA)

Metallicana is under siege from a group known as The Four Lords of Havoc. These villains, led by Ninja Master Gara and deadly Thunder Empress Nei Arshes and Kall-Su (three cold, calculated villains with no sense of morals or emotions) along with mysterious Dark Priest Abigail are prepared to go any lengths to achieve their ends, even if this means leaving in their wake anarchy and devastation.

High Priest Geo is desperate to rescue his kingdom and its people. So he calls upon a powerful wizard known as Dark Schneider - once an ally of villainous forces like Four Lords of Havoc - but with other plans. Will Dark Schneider stop or join in their attempts at conquering all?