X - AMDUCIAS

10 - Amducias - Depicted as having claws instead of hands and feet. Rides a unicorn or possibly is a unicorn? Carries a trumpet. Described as being in charge of the discordant music. Can make trees bend to his will. Said to give good familiars. 

From Pseudomonarchia

Amduscias a great and a strong duke, he commeth forth as an unicorn, when he standeth before his master in humane shape, being commanded, he easily bringeth to passe, that trumpets and all musical instruments may be heard and not seene, and also that trees shall bend and incline, according to the conjurors will, he is excellent among familiars, and hath nine and twenty legions.

From The Lesser Key

The 67th spirit in order is called Amduscias, he is a strong & great duke appearing at first like an Unicorn, But afterwards at ye Request of ye Exorcist he standeth [110r] before him in humane shape causing Trumpets and all manner of Musical Instrument to be heard But not seene also [causing] Trees to bend and Incline according to ye Exorcist [Exorcist's] will; he giveth Excellent familiars & ruleth 29 Legions of spirits his seal is Thus formed and is to be worn as a Lamin.

From Discoverie of Witchcraft

Amduscias a great and a strong duke, he commeth foorth as a unicorne, when he standeth before his maister in humane' shape, being commanded, he easilie bringeth to passe, that trumpets and all musicall instruments may be heard and not seene, and also that trees shall bend and incline, according to the conjurors will, he is excellent among familiars, and hath nine and twentie legions.

Canon Information:

Appearance: A unicorn, carries a trumpet, or many trumpets

Subrace: Likely a former power

Abilities: Conjures music, shapes trees

Legions: 29

Rank: Duke

Notes: Amducias seems to act as the infernal herald, however their position as duke makes a position like head of the post office much more likely. 

Brand of the Troubadour - The marked is able to manipulate sound.