Chiron takes them north to locate the other prisoners, who are being forced to dig up an entrance to the underworld by Gargarensis, a cyclops warlord and commander of both Kemsyt and Kamos. The heroes destroy Gargarensis's base and confront him, but he escapes to the underworld of Erebus using the entrance. The heroes follow Gargarensis into the underworld, where they find him trying to burst open a large door in the stone with a huge battering ram. Cautious of his motives, they destroy the ram. Gargarensis confronts them and causes a cave to collapse before escaping, forcing the heroes to find another way out. With the help of the dead, they reach three temples dedicated to the Greek gods Poseidon, Zeus, and Hades. Arkantos prays to Atlantis's patron Poseidon for help but receives none. He then prays to Zeus, who creates a staircase to the surface.