70s kung fu movie.

Pai Mai looking character with a black (left?) hand that kills by touch. He fights a young hero. Final fight scene is about 20 min. long. Lots af evil laughter and fighting (with swords even), and jumping up tree trunks and flying through the air. The Pai Mai-looking guy finally has enough and removes a glove covering his evil left hand - the one that kills by touch. More fighting and hero cuts off his hand and kills evil guy.

I once saw that clip on YouTube, but that's ages ago and I can't find it. I'm looking for the title of the movie.

Thanks!