Incubus (1965) a little known, but rather amazing, black and white film staring Canadian actor William Shatner. Tired of catching easy souls, the people who are already corrupted by power and greed, Kia, a succubus (female spiritual demon), seeks to have a challenge and corrupt a pure, good man played by William Shatner. Here she is warned against trying to turn his Godly ways by her sister, but she rejects all concern and caring as repugnant and corrosive elements of evil, and continues to move forward with full malice to bait the soul of her new prey/conquest..