Hercules Against Moloch (1963)

aka: Ercole Contro Molock

Glaucus (Gordon Scott), the prince of Tiryns and a powerful warrior, goes undercover in Mycenae to infiltrate the evil cult of Moloch, which is exacting tribute from neighboring kingdoms in the form of attractive young hostages, both male and female. Calling himself Hercules, Glaucus defeats Mycenae's champions and gains the favor of the voluptuous Queen Demetra (Rosalba Neri) whose son, covered in a dog's head mask, has been raised as the living embodiment of the dark god Moloch and receives sacrifices in his sprawling underground grotto. Princess Medea (Alessandra Panaro), a proponent of a rival religion devoted to the Earth Goddess, makes contact with Glaucus and helps him set up an elaborate plan for opening the walled city's gates to an invasion by the army of Tiryns.