Efreet (イーフリート)
Is a demon god spirit residing on the Plane of Fire, one of the Four Elemental Planes. He has appeared in the human world a few times, usually as a demon sword in desert temples. He also refuses to mind his own business, constantly butting into conversations of his foes, indirectly leading to his demise. (Source: Bastard!! Wiki)
Animeography
Bastard!! Ankoku no Hakaishin
Bastard!! Ankoku no Hakaishin (ONA)
Bastard!! Ankoku no Hakaishin Part 2 (ONA)