They have funneled their yin force into his body, and helped him attain the highest level.
5 seconds sound clip from the Return of the Bastard Swordsman movie soundboard.
You can hear this line at 00:06:05.404 in the DVD version of the movie.
Quote context
[...]
- Why?
- Yun Fei Yang has also learned Silkworm skill. He killed Fu Yu Xue and revived Wudang.
- Nonsense! I have already wasted him. How can he master Silkworm Skill?
- According to my information, the key to Silkworm Skill is to destroy and then revive.
- He had help from Madam and the young mistress, and Lun Wan Er.
- They have funneled their yin force into his body, and helped him attain the highest level.
- Chief, he has profited from adversity. He's a thorn in our flesh that must be removed.
- Our ancestors have always been defeated by Silkworm Skill.
- This time I must go to Wudang, kill Yun Fei Yang and avenge this insult.
[...]