Lin Yuantu was a monk at shaolin so he obviously knows more than Pixie SwordPlay. He would know the 72-Style Pixie Swordplay alone without the power of KHBD is weak. He should know that his descendants would not able to defend themselves against the powerful enemies. We understand why he didn't want to teach them the real Pixie Swordplay, but why did he not teach them any martial art from Shaolin instead of the crappy Pixie Swordplay????