Humiliation of demons

It was something I haven't seen and I didn't expect. The light of blue was attacking everything around and combining with black, it shone around everything that could be seen and even beyond that. The sky itself changed, the attack created by the noble disappeared as she looked in his direction. Well, she didn't really look, but her head was pointing in that direction. Then another thing appeared. It was on her forehead, she had a third eye after it opened, I couldn't feel anything more from her. No dark, no mana, almost no life. She was somewhere else, on entirely another plane of existence. Her weapon also changed, it had a few strokes of chains slowly whirling around the pole.