It was almost morning in Canterlot, and Princess Celestia was about to raise the sun. She noticed Luna was not appearing, so she could lower the moon. Soon, the moon was lowered, and Celestia did not think of anything, until it was late afternoon. Usually Luna would get something to eat by this time, but she did not. Celestia ran to her sister's room, but she was not there.
"Luna, where art thou?" She asked.
Now, the princess was extremely worried.
"Guards!" She yelled
"Your highness what is it?" Nightingale asked.
"My sister, she is missing," she said, "and my niece too."
"Stella is with Veta and I, your highness," he said.
"Why dost thou have my sister's child?" She asked.
"I am sworn to secrecy by Luna," he replied.
"Thou must say where she is I am worried," she said.
"She ordered me to seek out Sombra, it took a year, but I found him. Thine sister was with her husband all night, in the Crystal Empire," he said.
"Sombra might be harming her, he has no love in his heart since he was possessed. I must travel alone to the empire to rid of Sombra, Luna and I must save those ponies he rules," she said.
"As you wish Princess Celestia," he said.
Luna was just about to leave the empire to get Stella, when her sister flew in.
"Tia?" Luna asked.
"There is no time for questions, we must rid of King Sombra," she said.
"I will not aid thee in the ridding of my husband," Luna said, "he still loves me sister, and he has not harmed me in anyway."
Celestia knew that Luna would be heartbroken, but they had to rid of him.
"Luna we must save these ponies, they are suffering under thine love's rule," she said.
"I cannot, my heart is already breaking... again," Luna said.
"I am sorry, but..." She said.
"I know sister, I will go say goodbye to my love now," Luna said.
Luna entered King Sombra's throne room, to say goodbye.
"Luna why dost thou seem full of sadness?" He asked.
"I have come to say goodbye to thee," she replied.
"Thine sister is here to banish of me is she not?" He asked.
"Yes she and I must," she said.
"Oh," he said.
"But I do not want to, I will probably kill my self over this," she said.
"We have a daughter thou must care for. Promise me you will not kill thine self over losing me," he said.
"I promise," she said.
Celestia soon entered the throne room to banish Sombra. The fierce battle broke out between the royal sisters and the evil king. Celestia was thrown to the floor, and Sombra casted a worst fear spell on her. Luna had to finish him off, eventhough they loved each other, the fight was intense. Both having many injuries in the end. Sombra was lying helplessly on the floor breathing heavily. Luna crawled over yo him and kissed him one last time. Then, they whispered to each other as Celestia rose from the floor.
"I will return to you someday my love," he said.
"I will be waiting for thee, I love thee," she said.
"I love thee too," he said.
Celestia and Luna combined their powers and banished the king into the Arctic ice. Luna broke into tears. Celestia hated seeing her sister in so much pain, but they had done what was right. As they walked off the empire disappeared into thin air. Celestia began to weep, they had saved the crystal ponies, but they had also doomed the empire to nonexistence until the day Sombra would return.