The main protagonist is a male sorcerer and son of a king of some strange kingdom not on earth - it's full of monsters and probably on another plane. The story starts with him and his mother living on earth, doing underworld business involving magic and then being called to be an heir of said kingdom. The comics art was very colorful and detailed, often showing hundreds of creatures/demons in wide, whole page shots.
I think the story ended when the protagonist battled his monstrous half-brother over the kingdom.
EDIT: It was a paper comics.