"Give up, sister! You can never defeat me with the powers that I have now! The Element of Darkness shall grant me eternal dark strength!" Nightmare Moon shouted as she flew up into the night sky that she had brought up herself. Princess Celestia gritted her teeth and chased after Nightmare Moon.

  "Why do you have to make me do this to you, Luna?" Celestia thought to herself as she finally caught up to Nightmare Moon. "It's over, Luna." Celestia said as she harnessed the power of the Elements of Harmony, along with her own special element - The Element of Light. Celestia's eyes shone bright and her wings expanded as time seemed to stop just for her. Nightmare Moon looked back in shock, was she not the almighty dark Nightmare Moon? How was it that she was being defeated by mere light now...? Her thoughts came to an end as a loud 'woomph' was heard and a circle of rainbow colours emitted from Celestia. The colours enveloped itself around Nightmare Moon and a long "Nooo" was heard from her before the colours and light brightened down and all that was left in the sky where Nightmare Moon was just hovering was Princess Luna, weak and out of breath. 

  She had no energy to let her wings support her and so she slowly fell to the ground. Princess Celestia catched her and lay her gently on the ground. Luna opened her eyes slowly and all she could see was Princess Celestia looking down on her, a worried look on her face. Soon she spoke, "Luna...are you alright? I'm so sorry..."

  Luna took a few seconds to register in everything that happened and then spoke back. "No, sister...it is I who should be sorry...I never should have gotten jealous in the first place...can you forgive me?" The moon lowered as she spoke, and Luna saw the sun for the first time in decades. Celestia just smiled and nodded her head.

  The next day, a celebration was held for the return of Luna and the two sisters ruled Equestria together in peace.

But somewhere in Luna was something Celestia failed to account for...somewhere in Luna the Element of Darkness was still beating strong, waiting to be released...