Fire Monsters Against the Son of Hercules 1962

Maxus (Reg Lewis), nomadic son of Hercules, rescues Idar (Luciano Marin), prince of a sun-worshipping tribe, from a lake monster. When a band of cave-dwelling moon-worshippers descends on the Sun People and kidnaps their women for human sacrifice, Maxus leads a counterattack. He rescues the captured women but is abducted himself, before escaping with beautiful moon-worshipper Moah (Margaret Lee). But ahead are more battles with beasts and the Moon People, now allied with an even nastier tribe.