When Avatar confronted Blackwolf, he was en raged.
4 seconds sound clip from the Wizards (1977) movie soundboard.
You can hear this line at 00:04:11.098 in the Blu-ray version of the movie.
Quote context
[...]
- More years passed, and Delia continued to slip.
- He cradled her in his arms and wept.
- When Avatar confronted Blackwolf, he was en raged.
- But Avatar's magic was stronger because he had the emotional loss of his mother that drove him on.
- The day will come, my brother, when I will return and make this a planet where mutants rule.
- Blackwolf headed off, leaving Avatar very disturbed.
[...]