Crystal Fist
A young man vows revenge against the killers of his father. To do this, he must train with his father's teacher who teaches him the "Shadow Claw", a deadly combination of the eagle claw and shadow fist.
Starring Willy Dozan, Hau Chiu-Sing, Brandy Yuen Jan-Yeung, Yuen Siu-Tien, Corey Yuen
Watch "Crystal Fist" on Amazon released in 1979. It's a drama and action & adventure movie, and has a rating of 6.3 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.