Demon Strike(1979)

Silver Fox (Hwang Jan Lee) fights a dark martial arts master imbued with weird magical powers (which include performing strange rituals on captive women) and, of course, fantastic fighting skills. The Fox will need every one of his own prodigious fighting skills to triumph over the forces of evil that marshal against him in this rock 'em, sock 'em martial arts epic. The very formidable Leung Kar Yan costars.