Princess Celestia stared, dumbfounded, at the three villians. "OH. MY. ME. How is this possible, getting through the mirror after Starswirl banished you? Explain yourself before you force me to do the unthinkable to you."
"I don't know," scoffed Aria sarcastically. "Go through the portal yourself, you cake eating mudface. Maybe kill yourself while you're at it, do all of Equestria a favor."
Sonata gave her a look that screamed, "You're dead. I'll say something nice at your funeral." The facial expression she gave Aria was a quite peculiar sight to behold.
This made Celestia fume with seething anger. It was a small wonder that she retaliated by throwing one of her most hostile spells, the Magic Blood Slicer, one of the most devastatingly powerful spells in Equestria. But Aria merely sighed and deflected it using her own magic.
"How... how were you able to deflect that spell? Only the most powerful unicorns and alicorns can do that!"
"And Sirens," Aria snapped back.
Celestia gave up attacking, and it was a fortunate thing as well- Twilight had just arrived in the room. Celestia inquired why she had left.
"I was speaking with Sunset Shimmer." She turned to the Sirens, flashing a disgusted grimace at them as she did so. "She says she saw SOMEpony charge through the statue."
"So they HAVE seen us." Adagio's mind was already at work. Her plan was to get through the statue undetected, but that didn't go over so well.
"She says she's on her way here."
Celestia gasped, adopting an expression of utter shock. "You sent her... she's coming here... on her way... WHAT?!?"
"I couldn't say no. After all, she's changed since you last saw her." Celestia sighed, turning her muzzle up in the air. Twilight kept trying to convince her that Sunset Shimmer had reformed her ways, but it seemed to be in vain. "Fine," she grunted. "Just see for yourself."
It was about then that Sunset Shimmer entered through the mirror, and was greeted with a look of borrow by the princesses. She definitely was a sight for sore eyes- her mane was frizzled from excessive travel, even though it was a few mere seconds. Her face was practically green from motion sickness, and she stumbled about the mirror room, trying desperately to adjust to four hooves. Twilight dismissively said, "Yeah, mirror travel can be a hassle if you haven't been through in a while." Celstia kept looking at Sunset Shimmer, shooting a suspicious look in her direction, causing Sunset Shimmer so grimace sheepishly in her presence.
"Princess." Sunset bowed down to the floor, looking up after a few seconds, and noticing she was still giving her a skeptical expression.
"Princess?"
"Sunset Shimmer." She said, acknowledging her existence, but seemingly doing nothing more.
"Princess," Twilight warned, "we should be more acceptant of Sunset Shimmer. She has changed, after all."
Still the princess was skeptical, and showed her feelings with a suspicious glare that seemed to terrify everypony in her vision. Adagio found it necessary to talk. No, she found it necessary to blabber. And she proved she was good at blabbering.
"We're still here, Princess. But then, only ponies under your control would ever dare to call you a princess. You're a useless, pathetic little filly tyrant who, as Aria recommended, should kill yourself immediately. So go and make a Equestria happy and do just that, okay?"
It was not Princess Celestia who lashed out in burning rage. It was Sunset Shimmer. A Sunset Shimmer seething with hatred and violence. She used her most powerful spell on Adagio. Only things didn't go as planned.
The Sirens, as you might remember, feed on hatred and unfriendly competition. Adagio sensed hatred in Sunset. No, all three sensed it. So when Sunset fired her spell at them- they quite literally ate it. But then, the red burst of dark magical energy spread across Equestria and the human world once more. The three turned violently into the three Sirens they once were, and broke the cage in doing so. Twilight was stunned with horror. No matter how many times Celestia told her to get back, and ready her horn, she stayed planted in an almost stone like state, looking wide eyed at the Sirens. The Sirens took their advantage on the alicorn. They combined to form a large blade which echoed out of their heads. The blade, aimed at Twilight, lunged forward, striking her in the torso. Blood spurt all over the room, getting on Sunset and Princess Celestia as well. From there, the blade kept stabbing her in the same place over and over. Tears formed in Twilight's eyes, and streamed down her blood ridden face. She was alive, but barely. She let out a small, soft whimper as the blade exited her stab wound. Bone and veins were quite visible from the front, making Sunset scream with horror. Twilight fell to the ground, with only a millimeter of life left.
All over Equestria, Rarity, Applejack, Pinkie Pie, Fluttershy, and Rainbow Dash started whimpering themselves.
Obviously a disturbance was sensed.
--------------------
Celestia stared in horror as a bloodied Twilight laid motionless on the floor. A pool of blood quickly formed around her.
"We have to do something!" Yelled Sunset Shimmer. "She'll bleed out and die if we don't hurry!"
"But we'll be crushed by the Sirens!"
Sunset Shimmer looked at Celestia with overflowing tears. "I DON'T CARE."
Celestia sensed her sincerity, and went to help Twilight.
"You think you can help that fool?" Asked Sonata, chuckling with almost uncontrollable insanity. "Be our guest, she looks pretty dead to me."
Sunset, with a shaky, weak voice, rebelled. "We will help her. And we WILL defeat you as many times as it takes."
Sonata looked at Sunset as if she was crazy, as did Aria and Adagio. Adagio raised her blade to finish off the remaining two. But as the quickly lowered her blade, it bounced back- Celestia shielded Sunset while she tried to heal her almost incurable wounds. The strike on the shield took out all her magical energy, and as a result all her physical energy as well. The healing was almost over, and Twilight was able to speak with a few small whimpers. Sunset's tears mixed in with the blood that drew back into the body of Twilight. Normally this would've not done anything. But it created a magic inside the princess, unnoticeable to them at the moment.
A magic that will reveal itsself in time.