Naberius

This marquis of the Ars Goetia procures feuds between friends and then reconciles the quarrels he started, which is the whole of his office and runs in both directions at once. He comes as a flame-vomiting wolf with a serpent's tail, or else as a man with a raven's head.

Marked in the Goetia as dangerous to the operator himself, which almost nothing else in the book is: handle him carelessly, the text says, and he will kill the man who called him along with his assistants. He arrives raven-headed on a black wolf with a drawn sword.

Teaches geometry and every kind of measurement exactly, makes men subtle in astronomy, and turns them into birds. He announces himself as a peacock making a great deal of noise, and is ranked marquis in the Ars Goetia.

Given a territory rather than a subject: the Goetia has him ruling every spirit in Africa. He also teaches grammar, logic and rhetoric, finds lost and hidden treasure, and makes men valiant in war.

Appears first as a star inside a pentacle. His office is birds — their virtues and those of precious stones, and the trick of making them fly before the operator and stay, singing and drinking exactly as real ones do.

His gifts are entirely social: languages, rhetoric, a good reputation, and the affection of enemies as readily as friends. The Ars Goetia makes this marquis a great sea-monster, which fits none of it.