I have created this NPC to my campaign in Birthright. Arthamus is a evil version of Michael Roele. His plans is rule all over Cerilia with his bloody army of Goblins Orogs and evil peoples to create a "dark" version of The Roele Empire. The Players have feared more him when he came at the side of his domains with his giant army to propose a convenience alliance...
So if someone need to use him in his own adventures, or have sugestions to the cruel plans of the Lord of Monsters ask now