Red Sonja: The Black Tower (comics)

What is the Black Tower? What startling mysteries does it contain within its walls? And most shockingly... how will its very existence cause the death of Red Sonja? When the Hyrkanian swordswoman rides into the city of Lur, she discovers that a mysterious ebon fortress has risen in the night, inspiring paranoia among the populace. While some fearful citizens are driven to murderous frenzy, others become fanatic devotees of the tower's unknown inhabitants. As the years go by, Sonja is always drawn back to this desperate place where unfeeling eyes gleam in dark corners. Who are the Soulless, and what terrible fate will they bring to the red-tressed heroine?