The black spot on Luna's leg sympolizes the start of her corruption by Nightmare Moon. The tombstone is the grave of Celstia's and Luna's parents. She comes there to pour out her woes. Now, story time! Story: "Why can't the night be just a little longer?" cried Luna into the darkness, as she sobbed by her mother and father's grave. She thought no one heard her but, something did. An evil demon heard her and began to corrupt her. Unown to Luna a black spot apeared on her leg as new thoughts coursed through her brain. Oh, nothing drastic happened just a little more anger, hurt, and sorrow pierced her thoughts. All the evil would come in time. Luna, her crying finally ceasing, stood up with determination. "I will make Tia see why the night needs to be longer!" she proclaimed. The demon snickered and began to follow her, through shadows all the while getting just a little closer to possessing her. The End