Hwang Sa-jin (1973)

A warlord expanding his power is blocked by a group of martial arts experts. To win, he hires a team of "Devil Fighters" to kill whoever gets in his way. A final bloodbath in the notorious Devil Valley is unavoidable between the evil warlord and the martial arts experts who vow to defend justice to the death. This is a Joseph Lai release starring Richard Kao & Albert Lee, co-starring Polly Chen & Lei Chun, also with Rosary Wan, Cheung Man & Kam Wai Yee. This film was directed by George Lai & Kim Sze Hin and the martial arts director was Master Lee.