Gratia's body split. Her light couldn't stop Noah's slash and Night. Her power was unable to deal with the monstrous existence who was rewriting the limits that each rank had to respect.
The apparent severing of her connection with her dantian didn't affect the control over her energy. Gratia had one of Heaven and Earth's existences, but she remained a rank 9 cultivator. She was a personal world, even if her edges blended with the environment around her due to the connection with the rulers.
Gratia could call upon more power, but she couldn't see the point behind that effort. Noah had shown his superiority. His techniques, assets, and existence were above her. She even suspected that the difference between their powers came from a radically different approach to the cultivation journey.