"Rainbow. You seem very confident."

"Of course I am, Celestia. I'm going to win." The cloaked pegasus grinned as the two mares walked towards the arena.

"Really? How so?" Celestia questioned raising her eyebrows.

"Because I have to. For the sake of Equestria. For the sake of my friends." Rainbow Dash lifted her hood over head. As she did, she sniffed the air.
"Have you been drinking Celestia?"

Celestia's eyes widened. She rustled her large swan like wings.
"Maybe." She coughed.

"I could do with a drink." Rainbow muttered. The two mares squinted as the bright exploded onto them. The dark corridor lit up with with sun's light as they ponies neared the exit.

"Rainbow Miriam Dashery. Are you sure you are ready?"

Rainbow sighed before answering.
"If it saves Equestria...then yes. I am ready." She weakly smiled to the Princess.

~~~~~~

"Oh dear. Oh dear."

"Twilight. What is it?" Rarity asked.

"When did it come to this?" Twilight wailed. The six ponies sat in a row in the Canterlot Arena.

"Wha's wrong, Twi?"

"We're about to watch Rainbow fight to the death!! Our best friend!!" Twilight cried. Tears streaming freely down her face. "I don't want to watch Rainbow die." She croaked.

"Oh, Princess Twilight Sparkle. Nopony wants to watch any of this. But we are here, not to watch, but to support her." Princess Luna smiled sweetly to the purple alicorn.

"Nopony is going to die." Fluttershy hushed.

"Yeah but-"

"Yeah but nothing. Dashie will be okay. Okay?" Pinkie hugged her purple friend.

"Thank you Pinkie. Thank you girls."

~~~~~~

"Sir. We have arrived."

"I do have eyes Trident!" The stallion snapped.

Trident lowered his head.
"Sorry sir." He mumbled.

"Whatever. Do the guards have the three?"

"...yes...sir." Trident answered.

~~~~~~

"Your highness. They've arrived." A white unicorn stallion stated.

"Thank you sir. Now go and join the others."

The pony saluted before trotting off. Celestia now sat with girls in the Arena. She sighed. The only reason she kept the arena was for the farmer's market, every Sunday. She could have demolished it, along with it's blood soaked walls. But it was a building from the old Romane times. The deadly fights from gladiators to simple pony folk.

The stadium had now a small hoof-ful of guards from either side. From the Royal Guard and from the dark side.

"Look! Somepony is coming!!" Cadence shot a hoof towards a cloaked figure walking into the arena.

The pony was a butterscotch yellow stallion with light blue hair. His eyes, aquamarine.

Fluttershy rose from her seat. Squinting at the pony.
"No..." She barely whispered.

"Princess Celestia Solaris. Princess Luna Eclipse. Princess Mi Amore Cadenza. And Princess Twilight Sparkle." He paused as he glanced at a yellow pegasus mare. "Elements of Harmony and everypony else. We are here to witness a battle between good and bad. Between two great leaders. Between the current leader of the Assassin's Creed, and the current leader of The Obscurentur Animas. A battle which will decide the fate of this...peaceful land. Whether it's to remain it's harmonious state, or to reign destruction and dismay over it." Trident finished. He turned to his leader. Night Stinger appeared and walked up to him.

"You can see you sister now." He whispered.

Trident looked back to the pegasus mare with the rose pink hair.

"I am sorry."

"What for?"

"I'm leaving. I wish to disperse from this evil organisation." Trident said with confidence, loud and clear so the others heard it.

"What?! Why?!" Stinger growled.

"Because, I have a loving sister! And I wish to stay by her side and protect no matter what! I don't want to watch Equestria burn. Equestria is my home." He yelled.

"Your sister is not worth protecting! You disloyal bastard!! She's a pathetic mare whose scared of her own shadow!!" Stinger yelled back.

"No. My sister is the loveliest and kindest mare you'll ever meet! My sister is Fluttershy!!"

"Fluttershy?!" The girls said in sync.

Fluttershy shed a few tears before answering.
"My brother went missing a couple of years back. My parents tried everything to find him, but with no success. They gave up. I wanted to carry the search on, but by myself...I'm weak."

Trident fluttered up to Fluttershy.
"You're anything but weak, sis."

"Trident! I missed you!!" She leapt into his arms. Crying onto his shoulder.

"I missed you too. I would have come sooner, but they threatened to kill you."

"You'll regret this, Trident!! When our leader wins and kills that damned bitch of a fuckin' assassin, I'll kill you first and your stupid little sister!!" Night Stinger yelled. His voice echoing around the stadium.

"Oh shut your trap!" A voice yelled.
Night Stinger and the girls instantly recognised the voice.

A cloak pegasus emerged from the shadows.
"He has the rights to leave. And if you dare harm Fluttershy, I swear on my parents graves, I will bucking kill you!" Rainbow Dash snarled.

"Hmmm. Really? Rainbow if you wanted to kill you would have killed me ages ago." The unicorn sneered. "Is it because the wittle assassin is scaredy waredy of an old unicorn like me?" Night Stinger trotted closer to the mare. Rainbow gulped as she stood still. But kept her eyes to the ground.

"Ha! Silent treatment, heh? You're not so tough, are ya? You're just a weak, pathetic, dumbass whore. What would you do if I killed Fluttershy? Or the white unicorn? Or the pink pony or the orange one? What would you do? Cry to your mother? Like the foal. Cry to your pathetic mother and your weakling father." He was right in front of Rainbow now. Their snouts almost touching.

Rainbow snapped like a twig. She pushed the pony to ground.

"SHUT UP!! FOR THE LOVE OF MOTHERBUCKING CELESTIA, SHUT UP!!" She yelled.

"Hit a sore spot, have I?" He laughed. "What about your brother, heh? What about him?"

"He's dead! He's not here any more because you killed him!" She raised her dagger.

"Oh Rainbow. Didn't you know? I guess Princess Twilight and Celestia didn't tell you then."

Rainbow froze. Her eyes widened and she flattened her ears.
"What...." She muttered.

Everypony turned to another cloaked figure.

This pony was a large pegasus stallion. His wings were large and strong. He wore cloak similar to Rainbow's.

"Rainbow Dash, I was never dead." He lifted his hood. Rainbow gasped and staggered back.

"B-but...." She choked on her tears which were now running down her face. She turned to look at Twilight. Who had her head down.
"Why didn't you tell me this? Why?"

Twilight kept her eyes to the floor and simply shook her head.

The unicorn stood up and smirked.
"I welcome you, Sir Blitzen Dash. Our faithful leader."

"...you're....their leader."

"Yes. Can't you see, you stupid mare?" Blitzen sneered.

"B-but....why join them? They killed our parents! They killed mother and father!!" She cried.

"No! They killed your parents!" He screamed back. "They only cared for you, and for you only!"

The assassin stepped back.
"What do you mean, Blitzen?" Her eyes were now sore as her tears coated her cheeks. "What the hell do you mean? Of course they cared for you!!"

"No they bucking didn't!! They cared for my weak little sister!!!" He walked towards Rainbow.

"You are so blind! They loved you too!! I guess you were too blind to see that!"

Blitzen growled as he pushed Rainbow against the wall. Her head bashing against it. He held a bracer against her throat.

"They. Ignored. Me. You worthless mare." He hissed to her face.

"You couldn't see the real love they gave you." Rainbow said as she kicked him back. He staggered back but remained his balance.

"Please Blitzen. I don't want to kill you." The mare whimpered.

"I guess that means it's easier for me to kill you!"

~~~~~~

About ten minutes had passed since the two siblings began to fight. One more reluctant to fight then the other.

Rainbow slammed against the wall of the arena. Her cyan wings bloodied and hanging limply by her sides. Scarlet red blood dripped from her mouth and nose, making the taste of copper linger in her mouth. Her breathing was laboured. Her legs shaking. She was weak. But she refused to give up.

"Just give up, Rainbow! You're a goner! Either way, you die now or I'll have Night Stinger take you away." Blitzen stated.

"...n-never...I'll....nev...er give up." She spluttered.

"I knew you were going to say that. Guards! Bring them in!"

The girls gasped as the three ponies dragged in three fillies.

"Lemme go ya jerk!!" Applebloom demanded.

"Please! Rarity! Rarity! Help us!!" Sweetie Belle squeaked as she waved towards her sister. Rarity jumped forward but was caught by a blue aura.

Rarity turned Princess Luna with tears in her eyes.

"I'm sorry Rarity. But if any of us go down there, not only you be a target, Rainbow will be killed instantly." Luna apologised as her horn grew dim. Releasing the unicorn.

"What do you mean, Luna?" Twilight asked.

"Well, if one of us go down there, there are two different outcomes. One is Rainbow will try to protect you and end up being killed. Along with yourself. The other us that of a rule. Any viewers of a fight within the arena to enter during a fight, will be killed on sight for disruption, along with the losing opposition. As Rainbow is losing, she will be killed by your actions." Cadence explained. But the ponies were interrupted by a screaming filly.

"Let me go!! Rainbow!! Rainbow Dash!! Help us!!" Scootaloo screamed with tears in her eyes. The pony holding her held a dagger to her wing. There he slit her small delicate wing.

Everypony winced as the cries of filly filled the arena.

Rainbow cried to herself. She couldn't do anything to stop them. She was weak. She had no weapons.

Unless....

"No! Stop! Please!! Not the other one!! Please!!" The orange filly begged. The guard smiled as he placed his dagger under her wing. He was about to cut her wing again, when there was a loud thud. The guard stopped before falling to the ground.

Scootaloo looked up to see Rainbow Dash holding a large wooden plank from the far side of the arena. She gave a weak smile to filly pegasus.

"Rainbow! Thank you!!" Scootaloo squealed as she hugged the mare. Rainbow threw the plank and hugged Scootaloo.

"You're my sister. And I'll never let anypony hurt you."

"Aww. Such a sweet sight. Remember it well, Rainbow, as it was your last." Blitzen held his dagger as he came over to the ponies.

"Please, brother. Please. I beg of you. Don't hurt the fillies. You can kill me or whatever, just don't hurt them." Rainbow cried as she begged. Still holding the bleeding filly.

Blitzen thought for a while.
"Alright then. Guards let the other two go. But, Rainbow. You better let me kill you. Or the fillies and all your stupid friends are dead!" He spat.

Rainbow nodded. She stood up with Scootaloo on her back.

"Rainbow. You can't die." Scootaloo sniffed.

"Yeah. That would be horrible." Sweetie said as her and Applebloom skipped over.

Rainbow helped lift the fillies to the girls.

"Please don't leave Rainbow. I don't want you to die." Scootaloo now had tears flowing from her eyes. Staining her bright orange fur.

"I ain't going anywhere, Scoots. Okay? Now don't cry. There's no need for that." Rainbow used her hoof to wipe away the filly's tears.

Twilight pulled Scootaloo up. She looked down at Rainbow with a teary smile.

"Thank you. For saving the girls. It means so much to all of us." Twilight paused. "I don't want you to die." Her eyesight blurred as they welled up with salty tears.

"Hey, do I ever leave my friends hanging?" Rainbow smirked as she trotted back.

"Ready to die Rainbow." Blitzen held his dagger in his mouth as he trotted closer.

"Funny, heh? I was going to ask you the same thing." Rainbow used her wing that was less damaged to throw three small, flat, silver stars.

Two of which hit Blitzen. One in the foreleg, the other in the side. He cried out in pain as the metal buried itself into his skin.

"Damn you! Damn you!! Why can't you just die quietly?" Blitzen ran towards Rainbow.

"Because, I ain't dying!" She quickly moved to the side. And she used her bracer to stab her brother.

"Fuck!" Blitzen held a hoof to his newly made wound. Blood dripping down his dark cyan coat.

"Don't you remember Blitzen, out of our family, I was always the agile one." Rainbow grinned. But her grin was short lived as her ear twitched. "What?" As soon as she turned around, a plank whacked her on the head. Rainbow collapsed to the ground. Blood dribbling down her fore-head.

Night Stinger smirked as he held up the plank with his magic.

"Wait. That isn't fair. Two stallions against one mare." Twilight pointed out.

"Twilight, dear, none of this is fair." Rarity croaked.

Rainbow Dash groaned in pain. Her head throbbing with agony. She slowly opened her eyes. However, her eyesight was still blurred. She attempted to lift herself up, but her legs buckled beneath her.

"Almost dead, yet you still try to fight me." Blitzen laughed.

"Tis a shame, she shall die soon. I would have loved to have some fun with her again." Night Stinger walked away.

Rainbow shakily lifted herself up. Blitzen bent down, and used his hoof to lift Rainbow's face up to his.

"I guess I win then." He raised his dagger. Everypony looked away as he finally lowered it into Rainbow's chest.

Scootaloo wailed into Celestia's chest. Fluttershy choked on her tears as she hugged her brother. The others held in their wails and tears as they hugged each other. But for Twilight, she had her eyes tightly shut. Her own tears running down her lavender cheeks.

"No...nononono." She mummbled.

"We're so sorry Twilight." Celestia soothed as she stroked Scootaloo's fuschia mane.

"NO!" Twilight screamed as her horn lit up. She disappeared from her seat and appeared in front of Rainbow. "Rainbow! You said you wouldn't die!! You said you wouldn't!! But you did!!"

"...hnng....s-s...sto-p....y-yell...ing...T-Twi..." Rainbow coughed.

"Rainbow?"

Rainbow slowly stood up. Her whole body shaking. She leaned against the wall to support her.

"Damn it!" Blitzen stomped his hoof in anger.

"Rainbow! You're alive!" Twilight squealed as her face lit up.

"N-not.....f-for....long, T-Twi." Blood gushed from her chest and mouth.

"Fine then!! I'll kill Princess Twilight too then!!" Blitzen screamed.

"Wait!" Rainbow held up her hoof. "I'm...s-sorry, Blitz."

"What? What for?" Blitzen stepped back.

"I-I'm s-sorry y-you...didn't see the l-love our parents gave y-you....I-I'm s-sorry y-you didn't s-see t-the....love I gave y-you...T-this...whole t-thing....is...all...my...f-fault...I'm...sorry..." Rainbow weakly turned to Twilight. "I-I'm sorry...Twi...I'm sorry...I'm leaving you...all of you...b-but....I'll always be...in here." The assassin placed her hoof on Twilight's chest. The princess looked at the bloodied hoof and then back at the pegasus, who was smiling. "T-Thank you...for being my friend." Rainbow took her final breath as she fell to ground. Her blood creating a pool around her limp body.

Tears fell from Twilight's eyes. Her mouth opened wide from shock.

Blitzen on the other hoof, was frozen in his spot. His mind exploding with what his sister said with her dying breath.

"Finally!! She's dead!! Let's kill the Princess!!" Night Stinger yelled as quickly walked over with a dagger held in his magic. The lavender mare stood still as she stared at her dead friend.

"Die Princess!! Along with Equestria!!" Night Stinger was about to stab Twilight, when a bracer blocked him.

"Blitzen? What the hell? Kill her!! Your sister is dead!!"

"Exactly." He whispered as he stuck his other bracer into Stinger's stomach.

The unicorn gasped before looking at the pegasus.
"Why?"

"Once an assassin, always an assassin." He said as the unicorn fell to the floor in a bloody mess.

Author's Notes:

Dun dun DUUUUUUUUUUNNNNNN.

if it the feels rushed, that's okay. My phone was have spasms so I had to quickly type it up before it died.

Next chapter will be up soonish. Probably in a couple of days times.

The name for the opposition is Latin for Darkened Souls. My friend came up with the name.

And yes Aqua Shimmer, Celestia did get drunk on Moonshine. :D