She didn't let him burn her away. Not like last time.
She turned to air and swarmed into the shape of an enormous dome, picking up everyone except Malevolence (and his drones) and pushing them outside of it.
Then she summoned air. Lots of it.
As it filled the dome, she closed off any gaps in her substance that might have let it escape, increasing the pressure inside drastically in an instant. It became boiling hot and incredibly difficult to move through, if he could even move.
I will take no questions about the dubious physics, please and thank you