Princess Luna’s P.O.V:
I stood on my balcony, looking down at the street. Seeing how ponies walked with their special somepony. I felt anger rise in my heart. It was unfair.
I loved Sombra, and I still do. But now he was gone, banished. He would be gone for a thousand years.
I got angrier, and got an idea. It was time to accept the offer that the Nightmist gave.
I started singing, “I have been locked up for long enough, I've kept my anger at bay." I paused, and gathered all my angry thoughts. "I must let myself be seen as tough, as I wait for that day."
A blast of magic escaped my horn and hit the doors, destroying them. "It is time to break out, time to show Equestria what I can do. I will shout, all love my moon!"
I flew out of the window and looked down at the ponies in the street. I brought out the stars and moon, making it night as I sang, "Now I'll bring out my moon, bring forth the night, it is truly a most wonderful sight!"
Ponies gasped, not knowing why night had suddenly fallen. I teleported to the throne room where Celestia was, and continued, "I can't hold back anymore, it's time to set my demons free! Now I shall let my rage consume me!"
Armor began forming on my body. Then I remembered about Celestia. She asked, "Luna, what are you doing?"
I ignored her. "I don't care what they will say, I won't hold back my rage anymore! It is time for me to shine! I don't care what the ponies will do, from tonight, the night will last forever!" I finished my song just as my transformation was completed. I was now the same size as Celestia.
Oh how I hated her. She was shocked upon seeing my new form but managed to say, “Luna, I don’t know what happened to you, but lower the moon.”
“No.”, I replied. "And I am not Luna. I am Nightmare Moon."
“Luna…”, said Celestia. “Lower the moon now. It is supposed to be day. I don't have time for your pranks."
“No, Celestia.” I told her, “ I will not lower the moon. It shall be eternal night, and I assure you, this is not a prank. ”
“Luna, listen to me. You-”, Celestia started to say but I cut her off.
“No Celestia. Did you listen to me when I told you NOT to banish Sombra? No, you didn’t.”, I nearly screamed.
“That and this situation are two different things.”, said Tia.
“No, they are not.”, I shouted.
“Luna, I’m saying this for the last time. Lower the moon.”, she said.
“I am not Luna. I am Nightmare Moon. And what will you do if I don’t do as you say?”, I asked her.
Celestia’s horn glowed and she brought out six small gems. The Elements Of Harmony. Her magic spun them and a light raced towards me. “I’ll banish you to the moon.”
The last thing that I heard before I found myself on the moon’s surface was, “I’m sorry Luna. But it was the only option.”
Full of rage at being banished, I screamed, “CURSE YOU SUNBUTT! CURSE YOU!”
In an effort to calm myself, I put my hoof in my armor and took out a letter. It was the one Sombra had given me minutes before his banishment. I unrolled it and read, “To my dearest Luna. This song is for you. I wanted to sing it to you, but time ran out. So here it is, written down. Love from Sombra.”
I continued reading, "I was afraid to love, but you came and showed me your light.
As the days passed, I fell in love with you and your night.
I'm the pony that I am today because of you, oh Luna, you know it's true.
You captured my heart, right from the start.
And now I'm yours forever, our love is ending never.
I have loved you for a thousand years, and I'll love you for eternity.
Even if we are now apart, we'll be connected through our hearts.
Because if you love me as I love you, nothing could ever part us two.
We'll love each other forever, nothing can separate us ever.
Just call me, and I'll be right by your side.
We'll let the world know, paint the sky every color of the rainbow, using our love.
You captured my heart, right from the start.
And now I'm yours forever, our love is ending never.
I have loved you for a thousand years, and I'll love you for eternity.
Even if we are now apart, we'll be connected through our hearts.
Because if you love me as I love you, nothing could ever separate us two.
We'll let the world know, paint the sky every color of the rainbow, using our love."
I turned it over and read, "I wanted to sing to this to you when I was going to ask you to marry me, but I guess there was a change of plans.
I could still sing it to you a thousand years later, right? I know what you're thinking. You're thinking, why's Sombra so ok about being banished?
The answer is, even if Sunbutt banished me because we love each other, she won't be able to stop us from loving each other.
A thousand years later, when I return, our love for each other will be stronger than it was before.
I'll love you forever, Luna. No matter what pony does what. I'll love you forever. I call this, The Luck In Our Stars. Lots of love, truly yours, Sombra."
It was the most beautiful thing I had ever read. A stray tear rolled down my cheek. ‘Oh Sombra’, I thought. ‘How I wish that you were here.’
And then I cried my heart out.