The moon changes in the course of the story Embers of Moonlight from being grand and shining figure to a chunk of glistening dust,The moon then became see through then faded. This then tells when moon is dying as a piece of the night of rebirth.
In the story, it was the time of the Night or Rebirth when all creatures diet. The moon changes from young and beautiful(she was described as mesmerizing and luminescent) to old and weak(she became a sprinkle of sparkling dust, or the title "embers of moonlight" itself)