The Hell-Screamers are a Raptor Cult of some renown, consisting mostly of Night Lords. Led by the equally fearsome Acherius Erinyes, the Hell-Screamers sell their services to any Chaos Lord or Cult Leader in need of a powerful strike force, in return for technology, gene-stock, and the opportunity to sate their sadistic urges in battle. Because of their mercenary status amongst the forces of Chaos, this Raptor Cult has been present during some of the galaxy's bloodiest conflicts, and have caused quite a few atrocities during them.