In the ongoing Reydovan Empire storyline, Shadowgarde Castle was the citadel of Artimus Devaneaux. The name of the castle was created by the real-life Joshua Underwood in 2005 with a WarCraft-sounding name (along the lines of Stromgarde, Tiragarde, etc.), and it was used originally as the focus of a ongoing Imperium-Chaos campaign in Warhammer 40,000 between himself and his stepfather. For the image seen here, Underwood used an image of Kilkenny Castle in Ireland, reduced the brightness significantly to give it that dark, evil feeling, and used Greg Martin's "In the Shadow of the Stars" as a terrain backdrop.