Celestia was in a panic She searched all over for Luna. She alerted the guards that they should stay on high alert when Celestia decided to check the palace in the Everfree.
"Please Luna..."
She approached it in a matter of minutes and quickly checked on the throne room where Nightmare moon was fought. Celestia could hear singing as she rushed to Luna.
She had reached the palace door but before she opened it she knew she was to late.
"Luna..."
"Cruel moon bring the end.... The dawn will never rise again..."
Celestia backed away from the door with tears in her eyes.
"I'm not going to lose you again sister.."
Celestia teleported back to Canterlot and in an instant shot a giant gold beam into the sky. A bright flash followed by a sonic boom echoed in the sky. The Royal insignia was displayed above Canterlot for all to see.
A state of emergency was declared in Equestria.
**************
Twilight was in a state of panic, She had received a letter from Celestia with dire news. It was rushed and very informal.
Twilight, I need you to gather the Elements of harmony immediately. I regret to inform you that... Nightmare Moon has returned. I'm afraid that the Elements won't be enough to stop her a third time. I'll need all of your help to bring Luna to her senses again.
Rationally the first thing Twilight did was teleport every single one of her friends into the library, Rainbow Dash was asleep while the rest of her friends had very puzzled expressions.
Before any one of them could respond to their surroundings Twilight dumped the whole situation on them.
"Girlsweneedtogathertheelementsbecausenightmaremoonhasreturned!"
Applejack cocked her head, "Slow down Twi, Explain that to us again please."
Pinkie had understood every word and gasped. "Nightmare moon returned?!?"
They all gasped, While Rainbow Dash was only half conscious. Twilight shook her awake and quickly stated.
"We need to gather the Elements!"
Twilights eyes glowed white and she teleported them all the way to Canterlot.
They appeared in the throne room and saw Celestia already unlocking the vault. She turned to the six ponies and sighed in relief.
"Thank goodness your here, The Elements are ready for you."
Twilight nodded and levitated each of the elements to their respective owners. Once they were donned they galloped outside and gazed into the night sky. Twilight looked at Celestia and asked her.
"Where is Nightmare moon?"
-------------------------------------------
I took a deep breath in my new form, This time I was in control of myself while Nightmare moon was just a subconscious within my mind. The positions had been reversed and I am going to take full advantage of it.
I slowly stepped off of the pedestal. I looked out the shattered window and the moon took up most of the night sky. I ripped the iron cables from the window and took off towards Canterlot. I flew leisurely enjoying the view of my eternal night. I took my time getting there.
I wouldn't fly in recklessly like I did the first time. I was not going to fail this time. I flew for several minutes until I reached the Castle. I spotted Celestia and the mane six staring into my sky. I decided it was time to make my presence known and I swooped down and landed with a slight thud.
I looked into the eyes of seven angry mares and grinned.
"Hello Celestia, Enjoying the night sky?"
"I'm not playing games with you this time Nightmare moon, Release my sister or I will make you Want to be banished."
The grin on my face vanished. It was replaced by an expression of seriousness and immense hate.
"Oh Celestia. Nightmare Moon isn't in control... I am."
Celestia's expression turned to confusion and then shock.
"Luna? Is that you?!?"
"Oh yes, I am in full control of my actions."
I charged my horn and blasted Celestia through the palace doors. I turned to the mane six and Twilight was shocked. Her expression turned to one of determination and she began to charge the Elements of Harmony.
I closed my eyes and pure determination filled my thoughts.
"The moon will rise....
A white beam shot from the moon and illuminated my surroundings.
"The night will last forever..."
I opened my eyes and a large rainbow torrent shot into the air and down upon me. I clenched all the muscles in my body and formed a shield that fit tight around my body. I stood up and pointed my horn towards the beam. It collided with my body and a bone rattling impact shook my body. The power of the Elements was overwhelming. I was beginning to lose the fight with the most powerful magic in Equestria.
I clenched my eyes shut and tried to grasp the moon. In a bold move I pulled the moon closer to Equis and the Moon nearly blotted out all of the night sky. I felt ultimate power course through my veins and I grinned.
"Vivas Noctus."
A black beam started combating the rainbow beam and quickly began to overpower the Elements. The black beam sparkled with stars and it looked like the night sky itself.
The beam beat back the Elements and the unsuspecting mares were oblivious to their defeat.
I saw Celestia with a hoof over her muzzle and I grinned maniacally. The beam reached the six and their grins disappeared once they were shocked by the pure force of the night sky itself.
The elements stopped glowing and they fell to the ground. They cracked and shattered into millions of black pieces.
I stood there for several moments and started laughing maniacally. "I did it! AHAHAHAHAAA, THE NIGHT WILL TRULY LAST FOREVER!!!!" I roared in the Canterlot voice.
I turned to Celestia who had tears running down her face.
"I'm so sorry Luna...I'm so sorry for letting this happen to you."
I grinned, My victory was already complete. I sat in front of Celestia and took a deep breath.
"I know."
Celestia looked into my eyes
"And I'm sorry to."
I charged my horn and Celestia turned pure black, She started fading until she was completely gone.
"CELESTIA!" Twilight called out.
"What did you to do her!?!" She grabbed my leg with tears in her eyes.
I pushed her away from me and merely stated.
"I banished her to the sun."
Twilight sobbed and broke down right in front of me. I noticed the five other mares were all similarly fighting tears.
"You're free to leave Canterlot and start new lives under my rule. And if you'll excuse me, I now have a kingdom to run."
I laughed one last time and teleported in a black flash.
I stood upon the top of Canterlot castle and grinned. I knew of the obvious problems with eternal night such as below zero temperature's and starvation. I may be a tyrant but I'm not stupid enough to let my new kingdom fall all around me.
I enchanted the moon to reflect not just the suns light but everything the sun provides. Heat, and enough light to keep all the plants in Equis Alive.
I sighed with content, I was now the ruler of my own nation and the ponies were going to respect my moon, and die under it. I looked down upon Canterlot again.
My eternal reign had just begun.