She knows how to get rid of the black chains. She even has two solutions for them. Unfortunately, she can't execute either of the two solutions.
Fortunately for her, things are not completely hopeless. If she can't break the chains, she can find someone to break them for her. She can also find someone to kill the target for her.
She was contemplating who to go to for help when she sensed danger. She tried to escape, but it was still too late by half a step.
Even before Legion appeared around her, they were already tossing out the Mind Domination divine ability. So the white halo struck her just as she disappeared.
She had disappeared, but the white halo had entered her body, so Legion wasn't worried that she had escaped again. They only laughed and gave chase again.
She had lost her Mind Plague divine ability, which wasn't good news to her. But it was great news to Legion because it meant thay rhey could now use mental divine abilities without fear of being infected.