Morgana and her group kept listening to Sif recounting the story of how Brock had become the chief of Thunderbark and how he had killed Sif's dad in the forest by slicing his head off.
Corinna was present listening to the story, which angered her since now that Brock was the chief of the settlement, she wouldn't be able to interfere as much due to the tricksters' contract.
The contract that she and other tricksters had signed forbade them from interfering with the political affairs of any country, city, or town, and Brock fell in that category.
If the man with the bandana hadn't become a chief and instead kept murdering people without any political ties, Corinna would have been able to step in.
"Don't take this the wrong way, Cori, but I wasn't expecting any help from you anyways… I already know that contract made you guys pretty useless," said Morgana with a soft but severe tone.