The Super Kung Fu Fighter (1978)

The Super Kung Fu Fighter 1978 / 天下無敵 1978 / Wu Lin Di Yi Jian

A bevvy of top fighters, all fighting to rule the martial world and use the rarest styles ever put on screen. Master Ko is in possession of a very special sword. A sword that can cut through anything and becomes invisible, it, therefore, can easily trick and defeat the enemy. Many people are after this sword. One day, the master gets killed, and the sword is stolen. (Source: IMDb)