Greek underworld his duty was to bring these souls to the underworld and no one would persuade him to do otherwise. Cerberus (Kerberos), or the "Hell-Hound", is Hades' massive multi-headed (usually three-headed) dog with some descriptions stating that it also has a snake-headed tail and snake heads on its back and as its mane. Born from Echidna and Typhon, Cerberus guards the gate that serves as the entrance of the underworld. Cerberus' duty is to prevent dead people from leaving the underworld. Heracles once borrowed Cerberus as the final part of the Labours of Heracles. Orpheus once soothed it to sleep with
Scourge of the Underworld to avoid capture by Captain America. In 1993, Mark Gruenwald, who had created the Scourge of the Underworld and written nearly all of the main appearances of the character in "Captain America", wrote a four-part "USAgent" mini-series, in order to resolve the looming mysteries involving the character and his various forms and masters. The mini-series revealed that the Scourge of the Underworld was created by Thomas Holloway, the former Golden Age superhero known as Angel, who ran the organization with help from Domino and two henchmen known as Caprice and Bloodstain. Holloway had initially gone into retirement after a battle