I remember watching this movie as a kid and being quite impressed because I found it so bloody. I often remembered this movie and so I was really happy to find this now in a second hand video store after all those years. Of course I'm not that impressed nowadays - but it's still a very cool swordsplay-movie. I has a lot of great fights with some splatter pleasure like extremities being chopped off. Ohh, and it's no kung-fu- or karate-movie, don't know why they named it "Karate Exterminators" or "Lightning Kung Fu", maybe this was more popular at it's release-date. My german video-release is called "Der gnadenlose Vollstrecker" which is a title that totally fits. Really outstanding is the atmosphere. You have fights in pitch black, in the water and marsh, with fire and so on. And there is a lot of rain. You know, rainy, dark atmosphere, desperate and already injured heroes with long wet hair in the face standing counterpart ready to die. - Cool! And the hero is no real hero because he's a total cold-hearted, bougeois executioner. But there's some development with his character during the story which is quite realistic. And the end is very surprising and radical. So, the movie-makers are not just martial-arts- and swordsplay-professionals, they also knew how to develop a storyline and built some great atmosphere. For me this movie is a hidden treasure of all those kung-fu and swordsplay-movies of the 70ies & 80ies. 7 out of 10.