Princess Celestia gave into her dark thoughts and became Daybreaker. Princess Luna tried to reason with her older sister but she wouldn't listen and started attacking Luna. Princess Luna was already weaker then Celestia but now add this strength to it and this fight is one sided. The only way for Luna to win is...using the Elements of Harmony to banish her to the moon. Daybreaker was about to finish Luna until a rock hit her back and Luna saw you.

Daybreaker: "Awww. My sister's little pet is here to help defend. How cute. Too bad that you'll still lose. The sky will be eternal and forever day!"

Princess Luna: "You need to get out of here! This is too dangerous. Your the only thing I have left. Just leave and save yourself. I...want to believe I can handle this but I know I can't."