As an Earth goddess, the Empress could heal from any physical wound to a degree, Malakith had taken the brunt of the blow, and although it was purely a concussive blast, the power that it contained was unfathomable, no Earth god would be able to survive it. Push anything to its extreme and they would become terrifying.
The Empress began to slowly heal from the damage, hands, legs, and a growing head emerging from the small ball of flesh. Her eyes were open wide in fright as they surveyed the damage before her in unquestionable shock.
There had once been a review by a Scholar that she sent to be killed not shortly after because she felt that he had too much time on his hands and wasted essential palace resources on nonsense.