A demon by  marymouse

Naberius is a most Valiant Marquis, and showeth himself in the form of a Black Crane fluttering about, and when he speaketh it is with a hoarse voice. He maketh Men cunning in all Arts and Sciences, but especially in the Art of Rhetoric. He restoreth lost Dignities and Honours. He governeth 19 Legions of Spirits.

AKA Neberus, Cerbere, Cerberus