Kyouko increased the input of magic power into her Black flame and produced it endlessly, feeding it to the Cold Blaze with an intense look in her eyes, She wanted to figure out the limit of the skill cast by Zavier and wanted to crush his spirit at the same time.
Zavier on the other hand had a feeling of disgust in his mind. He didn't know from where the feeling came from but he felt that it was the emotion of the Cold Blaze that he had been wielding. It was feeling disgust at being fed the Black Flame in such a huge quantity.
Zavier could only feel sorry for it and continued trying to maintain the status quo so as to give more time to Valerie who was still busy gathering up her magic. Moreover, his intervention had also given Calista the breathing room that she had so desperately needed until then.