The Death Spectres are a Loyalist Chapter of Space Marines of the 13th ("Dark") Founding, only the second known Chapter of Astartes, besides the Exorcists, to have been created in that unusual Founding. They are a Successor Chapter of the Raven Guard as they share many of the same mutations as found in that Chapter's gene-seed. Stationed beyond the frontiers of the Imperium, the Death Spectres maintain a constant vigil to ensure that the supernatural inhabitants of the Ghoul Stars never again threaten the galaxy. The Death Spectres' homeworld is the planet Occludus. During the 13th Black Crusade, the Death Spectres infiltrated the world of Lelithar to assist the Imperial Guard regiments seeking to retake that world from the Forces of Chaos with stealth raids and hidden strikes.