Actually, Dugu Wu Di killed my master. He has long been Diancang's enemy.
7 seconds sound clip from the Return of the Bastard Swordsman movie soundboard.
You can hear this line at 00:24:20.638 in the DVD version of the movie.
Quote context
[...]
- With your generous help, Wudang will be safe.
- I've been friends with the late master Qin Song. I cannot stand idly by.
- Huashan and Wudang share a common lot.
- We cannot allow ourselves to rest if you are in trouble. You have our assistance.
- The Invincible Clan has been bullying us. Shaolin can bear no more of their doings.
- Actually, Dugu Wu Di killed my master. He has long been Diancang's enemy.
- Yes! Dugu Wu Di is not only Wudang's enemy, but our common enemy.
- This will be a perfect opportunity for us to come together against them.
- Excellent! Since we're on the same side...
- Now that we're all together, let's discuss how to deal with this monster called Dugu Wu Di.
- You Japanese, what are you doing here?
[...]