It had been her magic that the witch had used, just as she had used Azkadellia's magic during her sister's imprisonment in the O.Z.

"I wish I could promise it won't happen again," she said, softly, "But we don't know what the hamsters are going to do. But I know you can control it, Willow. I know you can. If it does happen again, it'll be because of them, not because of you."