Integration

[Singe]

It's all part of the act, Mumm-ra can blast her and hold back. Remember that Mumm-ra and Pumyra are both fueled under the same power AS. So Pumyra might be tougher than her previous self.

If the tech stone didn't fall to her, then she could have continued the act until they got to the fourth stone. Then reveal her true self. However circumstances made her reveal herself at the crucial moment.