Carter Wong grows a pair of white eyebrows and becomes the most iconic villain of all martial arts movies – the invulnerable white eyebrows character. I have been watching every martial arts movie ever made in chronological order from 1967 and my first notice of a white eyebrows villain was in 1968 in "The Swordsman of All Swordsmen". More famous invulnerable white eyebrows villains include Hwang Jang Lee and Lo Lieh. The rules of the villain also state that he does have one vulnerable spot that he can move around by will according to the time of day. This superpower is associated with a martial arts practice called Taiji Qigong that is an advanced part of the popular kung fu style usually referred to as Tai Chi in the East. None of the fights show real Tai Chi. Technically, a lot more is lost in the translation. The English dub oversimplifies the line "You must strike when he is not himself." The ability to shift one's vulnerable spot is always associated with the time of day. In the movie the shadow of the sword is shown to represent that factor. When he is not himself is not really when he is laughing. Every villain has that same laugh. A more accurate translation would be along the line of "You must strike when he does something a Qigong practitioner would never do – display overconfidence." As a practicing martial artist for most of my life I tend to notice details like this and they usually don't take any enjoyment away from the typical audience. Another thing I have over thought about the invulnerable villain is why no one ever thinks of dropping a net over him. Also the villain acts just like Superman in the old TV series when he stands tall to deflect bullets but then ducks when the empty gun is thrown at him. If he was really invulnerable he would not have to block or avoid any weapon or blow, he could just attack and nothing else. Nobody wants to see that fight choreography though so I will stop now. Many other reviewers have called this the best martial arts movie they have ever seen. I'm happy to read that but I encourage them to see more. I respect your opinion but there are many more movies out there and I am sure you will find other movies that are better.