There was nothing Ashala could do. The healing mechanism of the rune diagrams inside the palace was automated. They would heal her even if she didn't want them to. This was to make sure that the monarch stayed alive even if the monarch was somehow incapacitated by a spell that render her unable to give a command to the rune diagrams.
The healing light fell on Ashala. But instead of healing her, the black vapor around her body modified the light and it now devoured her HP. As her life continued to fall, more healing light was conjured to increase the healing speed. This instead caused her HP to plummet even faster.
No one could do anything about it. Mylaerla and Shalia watched in horror as their queen's life was depleted by her own palace's protection.
Ashala's body slumped next to the throne. At that time, a thundering roar was heard from afar.
"The country's guardian, Eurdrasill," Mistress informed.