Old Chinese movie

Hello. I watched this movie when I was a kid and quite affected by it.
There is a boy and his lover. They want to be with each other but there is someone wants them apart. I guess that was her father but not sure. They use magic to fight with each other. The boy’s power is bending water or something. I am not sure about bending but he definitely needs water to fight. I don’t remember what was the power of the father or villains power. So the villain abducting girl to a place where there is no water. Dessert or something. At the last scene when the boy was about to lost the battle, he rips his arm of and uses the his blood to win.
That’s all I remember but I cannot forget about that movie since. Thank you.