Back in Equestria, Twilight's friends were all gathered around the portal. They'd all been awaiting her return for so long since she'd left. Even though they thought Twilight had everything under control, that didn't stop them for feeling concerned for her. Even Pinkie had a slightly worried face as their gazes never left the portal.

Suddenly, the portal glowed brightly and they saw a purple blur with a green outline fly out of it and land violently on the castle's floors. Upon closer examination, it was Spike. He looked a little woozy as he finally got up onto his dragon feet. He then found himself surrounded by the rest of Twilight's friends, the friends she'd made in Equestria.

"Spike?" Applejack asked as she wrapped her hoof around his shoulders and gave him a sense of comfort. "What are ya doin' back here without Twilight?"

"Is she alright? Please tell me she's alright. FOR THE SAKE OF CAKE, TELL ME TWILIGHT'S ALRIGHT!" Pinkie begged Spike to give her the status on the situation as she violently shook him for answers.

"Pinkie, I'd like it if you took your hooves off poor little Spikey-Wikey here," Rarity said, using her words combined with her magic to make Pinkie relinquish Spike from her grasp. "The poor dear looks like he's been to Tartarus and back just to help her."

"Girls... I've got some explaining to do..." He said, sighing in defeat as he gazed at the portal he'd just come through, seeing Twilight hadn't returned. "Twilight's plan to defeat the Sirens has-"

Suddenly, they saw the portal glow once again. Twilight was coming home at last. They shared looks of glee as they saw the purple alicorn return to Equestria, transitioning from two legs back to her usual four hooves. She quickly walked towards the rest of her friends, who now surrounded her with glee.

"So, how'd it go?" Rainbow Dash asked, not even bothering to look at Twilight's rather serious face. She could see that Twilight had returned to Equestria and that was all that had mattered to her at this moment. "Did you give those evil Sirens a beatdown?"

"Girls..." Twilight started, using her magic to give herself some breathing room from them all. She knew they'd be looking at her with states of confusion at this moment, but she wouldn't even bother to acknowledge them. She then looked back at the portal and removed the book from its' perch, severing the portal's power and sealing it for another twenty-four moons. "We need to get to Princess Celestia and Princess Luna, NOW."

"What's wrong, Twilight?" Fluttershy asked, wondering why Twilight was cutting off the portal's power. She thought that she'd won and was cutting off the portal, in case that the Sirens she thought that Twilight defeated got any funny ideas. "Why aren't you happy to see us?"

"Listen to me, everypony," Twilight began, never ceasing to show her true emotions. Fury mixed with sadness with a little dash of responsibility. "Adagio, Aria and Sonata have won. They've defeated the Magic of Friendship and now have an entire army of Sirens, fighting alongside them as we speak."

"You don't mean they-" Rarity started, but was then quickly stopped.

"They have. The Sirens have won," Twilight said as she gathered the girls at an open area away from the portal, so that they could all listen closely to her. "Using their dark powers they amassed and with all the fury that Sunset Shimmer gave them, they turned all of the students of Canterlot High School into monstrous Sirens just like them. We need to tell the princesses right now, or we could be looking at something far, FAR worse then the Tirek Crisis."

"Hold on a second, Twilight," Rainbow Dash said, hoping that Twilight would listen further. She was a little surprised that Twilight had allowed her to speak for a second, but shrugged it off and decided to talk. "Sure they might have won, but you sealed the portal so they can't come back. Now I'm not one for egghead stuff, but I'm pretty sure that you've already prevented them from trying to conquer Equestria by doing that."

Suddenly, The Dazzlings' chorus could be heard coming from the portal. It was rather peaceful-sounding at first, but then all the other students of CHS sang along. It became a choir of Sirens, combining their powers to force the portal back open.

"Oh no..." Twilight said with horror as she looked at streaks of red lightning coming from the glass tint of the portal, hitting multiple walls and some books on the nearby shelves. The red streaks of lightning stopped shortly after they had begun, but now the portal changed from a glass mirror into a red vortex with lightning striking at random intervals.

"The time has come, my wonderful subjects!" A familiar voice broke through the portal, landing on the ears of the Mane 6 like a judge delivering their almighty sentence to whomever was unfortunate enough to be on the receiving end. "Now we can finally take our revenge and send Equestria on a one-way spiral of ruin!"

The girls and Spike all heard cheers follow after that little remark from the voice on the other side of the portal. They all shared looks of fear and worry as they now knew that those were cheers of warfare, not celebration. Twilight was about to use her horn, when she heard the voice speak once again.

"To all those of Equestria, we impart you with one last message..." The voice said, as entrails of red energy flew out of the portal, smashed through one of the nearby mirrors and spread out to all the corners of Equestria. "After all these years of exile, the Sirens are returning. And this time, we'll take your miserable little mudball by force!"

"We need to get out of here." Twilight said as she activated her horn as she heard Adagio giving her new warriors the go-ahead to attack Equestria. Her horn glowed violently as all of her pony friends and Spike huddled up close to her, so they'd travel with her to Celestia and Luna.

"ATTACK!" Adagio's voice said, just as Twilight and her friends vanished in an explosion of pink energy. Once the magic had dissipated, the portal glowed even more violently and broke free of its' horseshoe frame. Once it was a pure vortex, it expanded to allow large groups of Sirens to enter Equestria together.

In the streets of Ponyville, ponies of all varieties were going about their normal day's work. Earth Ponies were tending to the land, Pegasi were managing the weather and Unicorns were practising their talents in ways that would benefit themselves and all the ponies around them.

They suddenly felt a massive amount of seismic activity around their hooves and were immediately whipped into a panic. They'd all known from past experiences that such earthquakes such as this usually meant that something terrible was about to happen.

They looked at Twilight's castle, hoping that she'd be able to fix all this. However, their hopes were dashed once they saw the castle itself vibrate. After a few seconds of shaking, a number of creatures alien to Equestria emerged from the castle.

The ponies all looked in horror as they saw what looked like evil monster copies of themselves, along with some strangers they'd never even heard of before. All of these creatures that looked down on them had pony ears, hair extensions, wings coming out of their backs and evil glowing red eyes.

They all swarmed down on the ponies of Ponyville, getting them to instantly run and try to hide in fear. Using their newfound wings, they soared majestically over the town with extraordinary amounts of speed and mobility. Whenever they saw ponies trying to flee town and find somewhere else to live, they let out deafening screeches to pacify the fleeing ponies.

Once the ponies knew that escape was impossible, they were surrounded by the winged creatures. They saw them looking at their 'pony halves' and charged forward at them. All the Siren copies of the ponies held up their claws and left brutal cut marks on the ponies, causing them to bleed in agony.

There were some Sirens who even found their younger selves as mere fillies and colts, but that didn't stop them from leaving their mark on them. When they saw their filly sides they not only cut them, but they also threw them violently against the solid walls of the houses of Ponyville.

From the skies, there were four Sirens in particular who watched all this carnage happen. There was Adagio, who watched as all the ponies of Ponyville fell to her newfound army. Aria, who grew a devilish smile as she looked at all the blood dripping from the ponies and saw all their black bruises. Flash Sentry, the new commander of the lesser Sirens. And Sonata, who was too distracted with brushing her lengthy hair to notice all the chaos descending among Ponyville.

"Commander Flash," One of the lesser Sirens flew up to Flash and saluted him by pushing his pendant with his right hand, cloaking it in the red energy. He saw that Flash did the same thing and the two of them grabbed each other's right hands with such power. The power from their pendants quickly enhanced itself before fading away quickly. Once it had, the lesser Siren was allowed to speak. "General Diamond reports victory with all ponies subdued and ready for imprisonment. You may now give us our next command."

"Chain them up by their necks and bring them with us to Canterlot Castle at once," Flash said, his words rather savage sounding behind his usually calm voice. "Queen Adagio requested that the execution of all the fakers be done in front of Princess Celestia and Princess Luna herself.

"Yes sir!" He said before being stopped by Flash's hand again.

"One more thing, Lieutenant Green," Flash said, letting his new queen caress him tenderly. "Divide the army into separate squads, have them capture anyone else who happens to be a copycat. And if those meddlesome little equines even try fighting back, you have execute authority."

"Yes sir!" He said once again before finally being able to gather up groups of his fellow Sirens so that they could spread their reach to the other regions of Equestria and take out any evidence that they have pony halves.

"What about us?" Flash turned to look at The Dazzlings once again. He hadn't been given any orders other than to serve the three of them and command his lesser Sirens. "Now that we know the other ponies of Equestria will fall, where do our priorities lie, Your Majesty?"

"Simple, Flash," Adagio said as she turned to face Canterlot Castle, where Aria and Sonata were looking at now. "We come to places to conquer, not just to spread our wonderful songs. So together we can strike down Celestia and Luna, kill anyone who tries to fight and rule over this world with iron fists."

"Are you sure about that?" Flash decided to ask, worried that he might get some backlash from Adagio for questioning her desires. "I mean, you are facing off against three almighty Alicorns and Twilight's real friends as well. We are simply four Sirens, how can we possibly win?"

"Not four of us..." Adagio said as she put her hands together and whistled down towards the town. This whistle got a large group of Sirens to fly away from their current targets and aid Adagio and her sisters in their endeavour. "Forty of us..."

In the throne room of Canterlot Castle, Celestia was lounging on her gilded throne quite leisurely. She was quite content with the feeling that nothing was going wrong for once and that her people were all flourishing with happiness and peace. She was with her sister, Luna who was looking out at the wonderful world they both ruled over.

They suddenly saw Twilight teleport into the middle of the room with all of her friends with her. Celestia and Luna looked quite surprised that Twilight had come to them with no warning or greeting. Celestia then looked at Twilight with a rather worried look when she saw Twilight's expressions of panic showing quite clearly.

"Twilight. Why do you look so panicked?" Celestia decided to ask once Twilight had calmed down to get a good look at her. "You're usually never this worried whenever you come to visit me."

"Well, Your Highness... We've got a massive crisis on our hands," Twilight said, taking in a deep breath as she regained her composure and began to tell Celestia about The Dazzlings. She would tell them of the Battle of The Bands, their Hippocampi halves and even how they defeated her and her human friends. "Do you remember how Starswirl The Bearded sent three Sirens into another world, never to surface again?"

"Yes, I was rather a young age when he went out to confront those three devilish singers," Celestia began to remember her childhood memories of her, Luna and Starswirl. "Why do you ask, Twilight?"

"Well, it turns out the world he sent the Sirens to was the exact same world I went to with the portal's power," Twilight said, continuing her explanation. "They spent years amassing the negative emotions of the species there before they came to CHS to kick up some rage there. They turned a musical showcase into a Battle of The Bands, causing everyone to start showing nothing but hatred and fury for each other. They even managed to push my friends in the other world over the edge as well, making them expel Equestrian Magic for themselves to acquire. Using this new power, The Dazzlings overwhelmed us and transformed the audience we were performing for into Sirens just like them."

Celestia and Luna merely stood there, looks of pure fear and astonishment showing on their faces. Of all the worlds Starswirl could have sent them to, Celestia and Luna were appalled that he sent them to the Human World. They could now see the Sirens with their newfound bodies, turning the poor innocent humans into more followers for their insidious cause.

"What's our plan of action, Celestia?" Twilight asked, hoping that her mentor and ruler would have an answer to this new threat that loomed over all the ponies of Equestria.

"Well, I believe that your new power might turn the tides," Celestia reminded herself that by Twilight opening the box with the six locks, her most faithful student had now gained a massive power upgrade in Equestria. "But in case your new strength isn't enough to fend off The Dazzlings, we shall provide our own strength to aid you."

"How long do you think we have before the Sirens come for us?" Luna decided to ask Twilight, since she was the one who brought this matter to their attention and hoped she knew how long they had to prepare for the assault on Canterlot. "If you know so much about how The Dazzlings conquered this other world, then surely you know when they'll strike Canterlot..."

"Don't worry, Luna. I'm sure that we have plenty of ti-"

Celestia was suddenly tackled by the Siren Flash Sentry, thrown to the floor in surprise as her body was weighed down by his physical stature. She tried firing her magic to knock him off, but he merely grabbed onto her surprisingly long neck and held her up in place.

Luna tried to fight back now, charging up a bolt of her own magic to strike this monstrous copy of Flash. She was surprised when she noticed Flash turn around and roar a single note of music, knocking her bolt right back at her and sending her flying against the walls of the throne room once it had impacted with her.

"Come on, girls. We can do thi-" Twilight was suddenly held down by a Siren with purple hair with a white stripe in it. She could see that her attacker had a diamond tiara on each of her ears and the signature red pendant of The Dazzlings hanging from her neck. Twilight tried to speak further, but she was now locked in a chokehold as well.

"Twilight!" The girls all said together, before being held down by more of the humans-turned-Siren from CHS. They were all held by their wings, horns and hooves so that they couldn't fight back. Spike was merely picked up by another one of the sirens and thrown out of the window they had all come in from, enabling him to scream as he took the longest fall he'd ever taken in his life.

"Spike!" Twilight said through her choking noises as she watched Spike fall, presumably to his doom. She'd known Spike for years on end and now thought that this was where his life finally ended. She shed a tear and immediately stopped trying to fight back.

Suddenly, Celestia's royal guards came in from the front door. They were clad in battle armour and carried royal swords, spears, lances and a wide variety of other weaponry to fight against the Sirens. They too were quickly brushed away when the Sirens all looked at them and roared the same note Flash had uttered to deal with Luna.

When Flash and the other Sirens were done choking their pony victims long enough, they threw them all into one big pile and uttered The Dazzlings' chorus together. They were quite grateful to The Dazzlings for teaching them such a powerful sequence of notes with many different properties. Using this power, they sealed the two Alicorn rulers and the Mane 6 in a powerful orb of Siren Magic, unable to escape or even speak.

The Sirens then began to sing a mighty crescendo, their voices growing louder and louder as their pitches scaled as well. Once their voices were loud and powerful enough, all of the stained glass windows that surrounded the throne room shattered, revealing nothing more than a doomed Equestria for all of their captives to look at.

"Her majesty, Adagio Dazzle. And her faithful sisters, Aria Blaze and Sonata Dusk." Flash announced to his fellow Sirens and his captive ponies as he watched his new queen and her associates fly into the throne room, with devilish smiles on their faces as they started examining the throne room.

"Well, well, well..." Adagio said as she now approached the orb, which now held the eight ponies hostage. "If it isn't The Rainbooms and their pathetic little high-school principals..."

Twilight tried to speak, but the orb had completely cancelled out any words she tried to speak to the Sirens. She looked quite angry as she now banged on the orb with her free hooves, still making no outside noise from any of it.

"What's the matter, Twilight? Cat got your tongue?" Adagio said as she used a red tendril of Siren Magic to link herself with the orb, so that she could hear everything that Twilight and her friends had to say to her. "Is that better?"

"I said you'll never get your grubby little hands on Equestria, you vile witch!" Twilight said, repeating what she'd said once Adagio could hear her perfectly. "As long as the Magic of Friendship exists in this world, we will defeat you!"

"Funny, I imagine that's what your pathetic human world friends thought before they perished at our hands," Adagio said as she rubbed the orb seductively, getting more hatred to flow from Twilight and her friends. "Oh well, they learned the hard way that some things are far too good to be true."

"Cut this orb down so I can come out and rip you limb from limb, you vile temptress!" Twilight said, looking quite furious now as she repeatedly pounded on the orb with her hooves over and over again. Her actions were met with a massive electric shock from the orb's energy, causing her to cease what she was doing and look at The Dazzlings with pained looks.

"Well I would, but then you'd try and run away from your problems," Adagio said, making sure that Twilight had no chance of escaping with her friends so that they could fight back. "And then I wouldn't be able to use you for your oh-so-powerful Magic of Friendship, Princess Twilight..."

"But then again..." She said, clicking her fingers. Once she'd clicked her fingers, the orb disappeared, leaving the eight ponies in a complete wreck. "I know that you trying to escape is futile, as I know have an army which will neutralize you in mere seconds. And they'll all do it under Flash's orders..."

"Flash?" Twilight looked over at the Siren that used to be her boyfriend from another world. She saw him looking at her with an unquenchable fury. Sure, Flash had been a jerk to her during the Battle of The Bands, but now he was commanding Adagio's new army. Twilight looked at him with a sad look as she mainly looked at his longer hair, pony ears and Siren wings.

"Did you for once think that the Magic of Friendship would be enough to win the Battle of The Bands, Twilight?" He said, trying to break her down even more so. He now showed nothing but disdain for his former girlfriend from Equestria as he walked closer to her. "It takes more than some weak song coupled with Equestrian Magic to stop Sirens who TAKE Equestrian Magic. You were doomed from the start, you stupid mule!"

"Flash, how could you-" Twilight was then picked up by Flash and was held up by the tail and smashed around like an oversized flyswatter.

"Don't even speak to me, you idiotic... Infantile... Useless wreck of an Alicorn!" He said as he smashed Twilight's face in perfect sync with all of his insults, adding salt to the wound as he now saw Twilight covered in bruises unlike any other. "We were never friends to begin with and we never will be! My allegiance is to Adagio Dazzle, Aria Blaze and Sonata Dusk. Not to some prissy pony princess who decides to play human!"

Twilight now showed nothing but tears at this moment. She knew that the Flash Sentry she used to know and love had now been lost forever to these witches. She remembered all of her good memories with Flash before he grabbed her by the neck, held her body down and stood on her head, leaving her horn visible.

"You're no Alicorn, Princess Twilight," Flash said as his pendant gave him a mighty axe with Siren gems decorating the handle. He made sure he was out of harm's way, brought the axe up high and said his last words to Twilight before he brought it down. "You're merely another gnat for us to swat!"

The axe came down with brutal speed, making a distinctive clanging noise once it had hit the ground. They all heard Twilight screaming in agony and now looked at what Flash had done to her.

Twilight lay on her side, crying in pure pain once Flash had stepped aside for all to see. Her emotions combined with all of her physical pain made her into a blubbering wreck of what she once was. But the most frightening part of all, was the fact that her horn was no longer on her forehead.

When everyone looked, they saw that Flash had cut Twilight's regal horn completely off, severing her from any chance she had of using her alicorn magic to fight back against the Siren species. All the ponies looked quite sad as they watched Twilight cry with unthinkable sorrow surfacing.

"For you, Your Majesty," Flash said as he picked the broken horn up and tossed it to Adagio, who caught it and smiled once she'd gotten a good grip on it. "A present, to celebrate your victory not only in the Battle of The Bands, but in conquering Equestria as well."

"Aww... it's such a generous gift, Flash," she said as she felt how tender the now powerless alicorn horn was. She could feel all the power that used to have been Twilight's with every gentle stroke of the delicate point. "Tonight, you shall become the regal prince of the Siren Kingdom."

"Thank you, Your Majesty." He said, taking a humble bow as he picked the still crying Twilight back up and threw her with the rest of her pony friends.

"Now then... I think we need to make things a little more cozier for Celestia's abnegation..." Adagio said as she let a few Sirens fly outside and hold their pendants up high for the changes she would be making. "I'm thinking a little more... Redder skies are in order for our grand coronation."

The Sirens merely flew out into the skies now, singing The Dazzlings' chorus once again. This time, the clear blue skies were replaced with a complete veil of blood-red storm clouds. This blotted out Celestia's majestic sun completely and covered the world around them all in a sunless darkness.

Once the world was covered in her dark red skies, Adagio and her sisters flew up into the air with their brethren. Their pendants combined together and cast a number of red frames of magic, which magically communicated with the other Equestrian cities, who were already submitting to the Sirens.

"To all the leaders of Equestria, your time is at an end," She said as she showed them the injured, crippled and weak mess of ponies that were the Mane 6, Celestia and Luna. "As you can all see, your precious rulers have fallen to our power and the Magic of Friendship has been defeated at long last."

"We now control this pathetic little dirtball, you maggots!" Aria said, taunting the leaders of each city with her sadistic attitude. "Should you be considering any kind of uprising, that's considered letting our mighty army of Sirens kill you on the spot with brute force and zero mercy."

"You should probably all give up while you still have the chance," Sonata said before noticing that all of the equine leaders of each city had been held hostage by all of the Sirens that roamed Equestria. "Oops, guess I spoke too soon, didn't I?"

"For now, you should only know our names as they shall be all that you answer to from this point on." Adagio said as she motioned her sisters to perform a little roll call.

"The excellent, exuberant and all around exceptional, Aria Blaze!" said Aria, posing in victory as she tried to get each of the Equestrian leaders to show hatred.

"The superior, sensational and sinisterly sly, Sonata Dusk!" Sonata said, making more of those evil poses for the leaders to watch in horror.

"And I am your leader. The one and only. The audacious, all-powerful and almighty leader of the Sirens... Adagio Dazzle!" She said, casting her sinister smile on all of the ponies of the world before she and the rest of The Dazzlings shared in an evil laugh that would ring through the ears of all that succambe to their new rule.

Author's Note

By the way, I'm still not sure they were actually Hippocampi when Starswirl sealed them away. Sure the book says its' that way, but I'm completely certain that that's not the case at all. Sirens are classified as mermaids in true Greek mythology and that Hippocampi were used to pull Poseidon's chariot. I find it a bit odd how Poseidon's fish-horses could possibly sing well, or at all for that matter.

If you have your doubts with this logic, then make sure to let it be known in the comments box below