Twilight then got thrown out of the wall onto the outside skidding all over with Serenity walking towards the purple alicorn princess.
"You trying to fight me Miss Sparkle won't help you" Serenity said lifting Twilight up a little.
"Why are you doing this?" Twilight tried to say.
She put her down and walked back into the castle to grab that black book with sliver linings around it and placed it into her saddle bag.
Luna fired a warning shot at her making Serenity drop the book.
"That's far enough you little archangel" Luna proclaimed standing in front of her angrily.
"You must be Luna...I do believe that we met before" Serenity said staring at her blankly.
"I will not let you take over this world for as long as I still breathe" Luna said, a soft breeze blowing through her sparkling blue mane.
Serenity admired Luna's determination but was cut off with a headbutt into a bookshelf knocking down some books on her. Luna levitated her 10 ft above ground then tossed the archangel through the glass window breaking through it.
"I will not stop until your done with and out of my village!" Luna proclaimed.
Serenity got up, struggled a little bit but managed to stand up. "Princess Luna you fighting me is not going to help you" Serenity tried to warn her.
"I don't care about that! I am sick of you haunting me!" Luna shouted punching her repeatedly in the face.
Serenity couldn't cover herself to stop Luna's explosive punches. A large gust of wind blew her back up in the sky giving Serenity enough time to recover.
She jumped up to kick Luna's stomach hard sending her down like a meteor falling from the sky.
The ground shattered causing a deadly shockwave that created a mammoth sized crater with Luna's body on it with blood trickling down her face.
Looking down, Serenity flew down to what could be left of Luna's broken battered body. The crater was large enough to make a massive hole where Luna laid with blood going down her face and body, some almost covered her cutie mark.
I warned you about this Princess but you never listened and now here you are Serenity looked down at Luna with a blank look on her face.
All of a sudden a blue magical energy blast blew her back a few feet away, sending her tumbling through dirt and soil. Luna struggled to stand upright letting the blood drip all the way down to the ground breathing heavily.
"I.....am not....going to be bested...by....an...archangel" Luna said in between breaths.
Serenity got up again wiping off the blood from her right eye then spread her wings apart revealing metal tips at the end of them and fired them at Luna.
Luna activated a shield to protect herself from the metal tips Serenity threw at her.
"It won't work Princess Luna" Serenity said retracting her wings.
The lunar princess then used this opportunity to jam her horn into Serenity's neck causing her to choke on her own blood but the trick was she couldn't die on the fact she is an archangel.
Serenity created a massive shock burst pushing Luna back into a hole in the crater and twisted her right ankle causing her to writhe in pain.
"I have warned you Princess...you fighting me would be pointless" Serenity watched emotionless watching her groan in extreme pain. Luna tried to scurry away but the hoof was stamped deep in her broken angel.
"No pony whether they be unicorn, earth, or unicorn no matter what you will not best an archangel like myself" Serenity explained.
"Not true...I have not only my sister but everypony else" Luna proclaimed pushing her off.
She skidded on the ground using her wings to stop herself then looking at Luna as a surge of unknown power came within her, she floated upward above ground as a black ball surround the princess of the moon until the ball came right back down.
What kind of power is coming from her? Serenity stared more intensely.
Once the ball receded, Luna emerged out in a Nightmare Moon armor except her eyes remained the same.
"I AM THE PRINCESS OF THE MOON! I AM PRINCESS LUNA!" Luna shouted making the surge well known.
Serenity tried to move but Luna smacked her face in causing her face to eat dirt. She then stomped on the archangel's wings with a small crack that made Serenity wince in pain.
"Now I exist for a reason and that reason is to stand side by side with my sister" Luna proclaimed ripping those wings off.
All that was left was tips where the wings used to be. It started to bleed as Serenity tried to move but Luna held her head down on the ground.
"Now you are never going to stalk my life anymore" Luna said squishing her head between her hooves.
The armor disappeared, reverting back to normal then walking back to Ponyville with a healed left ankle after what Serenity did to her earlier.
Twilight woke up in the hospital with Celestia watching her and smiling.
"Princess...what happened?" Twilight asked half lidding her eyes to focus on a blurry Celestia.
"Shh Twilight don't move your alright now" Celestia placed a gentle hoof on her student's cheek.
A collection of hooves click clacked down the hallway passing by doctors and nurses who greeted her as she made her way to Twilight's bed rest.
Celestia was the first to notice. "Luna what are you doing here? And what happened to you?" Tia asked looking at her younger sister's battle scars.
"I fought an archangel and won" Luna replied coldly.
Tia knew about Serenity appearing in Luna's room but never thought she was an archangel. Twilight looked up, noticing the lunar princess standing in front of Tia having a conversation but sounded muffled so she closed her eyes to sleep the intense pain away.
"Luna you know that archangel could've killed you! How were able to fight her?" Tia got scared and worried about Luna fighting beyond what power she had.
"I don't know what happened. One minute she was clobbering me then the next my power started surging as if I was going to turn into Nightmare Moon but for some reason...I didn't" Luna explained.
That's when Tia noticed a scar on Luna's left ankle. "Where did that come from?" Tia asked pointing out to it.
"This was caused by Serenity's attack that involved a shockwave" Luna continued to explain.
Tia hugged Luna as a way to tell her she was glad to see her younger sister again.
For the first time Luna felt so much better.