"They're weapons, powered by human souls," Tyki said flatly. "They're used by the Earl of Millennium in the war between himself and the Black Order, on my world."

"They are unstoppable, except by myself or an Exorcist, and their only desire is to murder." He cocked his head. "I've decided, in light of the fact that the Earl has expanded his war to other worlds, that I will no longer serve him."