Maiden Do Well dodged Adagio Dazzle's attack, but just barely. The power of the Red Stone made some changes in her body, and her longer and sharper nails were one of them. She was frantically attacking the masked girl, trying to rip her to shreds with her claws. The Maiden could dodge them for now, but she couldn't dodge forever.

"Why are you doing this, Adagio?!" The Maiden asked. "I thought you wanted to free your sisters! I thought you truly cared about them! Was it all a lie?!"

Sombra laughed. "Can't you see that she is completely blinded by her bloodlust? You might as well give up now and let her finish you painlessly, you're just delaying the inevitable."

The Maiden tried to take another step back, but she didn't realize that Adagio had cornered her. There was nowhere else to run! Adagio prepared to attack one last time, but her blow was blocked by the grid of the vent being held by The Maiden. But it wasn't the same Maiden Do Well she was fighting, for she was still with her back pressed against the wall.

"You ok there, Trix?" the second girl asked, still holding the grid, since Adagio's fingers got stuck in it.

"Yes, thanks." she said.

Twilight and Zecora were surprised by the sudden appearance of a second Maiden Do Well, but Sombra just kept smiling, as if he already knew.

"Your astuteness I'm not trying to belittle." Zecora said. "But this explains so much, and yet so little!"

Adagio finally released her fingers and immediately tried to attack Sunset, but she was quick to duck and spin with her leg outstretched, tripping her opponent. Adagio fell flat on her face, though still smiling that same evil smile. She got up and jumped back to gain some distance, and her Stone started glowing.

Adagio's eyes were now completely red, her nails grew longer, her teeth got sharper and wings sprouted from her back, ripping through her shirt. The next change was a big one: yellow, sharp scales grew all over her body, completely destroying her security guard uniform and covering most of her skin, leaving only her face, neck and the area around her sternum and clavicles, where the Red Stone was located, exposed.

"Together?" Trixie asked.

"Together!" Sunset replied.

Trixie threw a smoke bomb at their feet, creating the perfect hiding place. Adagio looked around, trying to locate her opponents inside the smoke cloud they were all in, but was caught off guard, receiving a flying kick to the stomach. The Maiden immediately concealed herself in the smoke, then prepared to attack again. She tried to hit Adagio with another flying kick, but she was quicker to react this time and grabbed the leg of her assailant, then spinned and threw her against the wall. Sunset was a very resilient girl, though, so she only got dazed for a couple of seconds and got up as soon as she could.

"That can't be right..." she said. "Her movements are quick and powerful, but far too stiff. Like a..."

"Marionette? Yeah, I noticed that, too." Trixie interrupted. "Not to mention that smile. It sickens me! Not because it's intimidating, but because it's too... Forced!"

"I don't think Adagio betrayed us. I think there's something else going on here!"

The siren flapped her wings and flew toward them at breakneck-speed. Sunset dodged in time, but Trixie wasn't as quick as her partner and got pinned against a wall. Adagio prepared to deal the killing blow, but whispered a few words before that:

"His inner pocket... Help me..."

Sunset spin-kicked Adagio's face, making the winged beast drop Trixie. The magician looked at Sombra and smirked underneath the Maiden Do Well mask.

"I figured it out!" she said before sprinting toward the CEO of Umbrum Corp.

Sombra assumed a fighting stance, ready to counter any attack The Maiden might try to use against him, but Trixie was fast like a monkey and was soon standing right between his arms, a place where he couldn't punch. He tried to bear hug her, but to no avail; she used his shoulders as leverage and jumped over him.

"So that's what she was talking about." Trixie said while inspecting the Red Stone she had in hands. Sombra checked his inner pockets, only to notice that the Red Stone he had was indeed missing. Adagio Dazzle stopped moving the moment the Red Stone was taken from him and now just hovered there, montionless. "Were you using this to control her?"

Sombra chuckled. "Looks like you found out. Congratulations!"

"How are you doing this?" Twilight asked. "You know how to make the Red Stones work?"

"Of course I do, Dr. Sparkle! After all, I've been studying magic and magical artifacts since long before you were even born."

"And yet you still forced us to make experiments in humans, killing dozens of innocent people? You truly are a soulless monster!"

"Wait, but magic doesn't exist in this world!" Sunset pointed out. "How can you know about magic?"

"Oh, you think your race was the first one to find their way into our world, miss Sunset Shimmer?" Sunset Shimmer flinched. "That's right, I know who you are. I know what you are! And I must say, your race wasn't the first to visit this world, and it is certainly not the last."

"How? How can you do this?"

"Story time already, huh? Alright, if that's what you want, I'll humor you. It all started one thousand years ago in ancient Egypt, when I was still mortal like the rest of you!"

"Y-You're... Immortal?" Trixie asked with a shaky voice.

"Indeed! Magic truly is a wonderful thing. I bet you miss yours so much, don't you, young unicorn?" Sunset Shimmer didn't said anything, she just kept glaring at Sombra. "Fine, fine, I had no idea you liked stories that much! But anyway, one thousand years ago, I was but a young slave trying to survive another day. Everything changed one night, when my parents and a group of other slaves decided to escape. We didn't went far before the guards noticed us, so we ran through the desert for our lives. I got separated from my parents while running, and that's what saved my life, because while they were caught and executed, I got swallowed by quicksand.

"At the moment I thought I was going to die right then and there, but instead of being buried alive, I fell into an undeground cave. And there's where I found this!" Sombra removed his tie and unbuttoned the first buttons of his shirt, revealing a golden chain necklace with a glass locket hanging from it - a golden coin with an eye-shaped hieroglyph on it was located inside the locket. "This is the Eye of Ra. Many thought it to be a legend but, as you can see, it's very real. And very useful, too, since it allows me to see the inside of a person!

"In layman's terms, the Eye of Ra allows me to see a person's biggest desires, their worst fears and, in cases like yours, their true form! And not only that, but much more. I can see everything! So, I used this new power to destroy those who made my childhood a living hell; the guards, the slavers, my 'owners' and whoever else got in my way afterwards. I spent the next few centuries researching and gathering more artifacts like this one, studying them, testing them. Immortality was just another achievement!

"After a few decades without finding a single new magical artifact, I had a great idea: what if I created my own? That's why Umbrum Corporation was founded! It didn't went well, though, since the amount of magic needed to create one is far too great for a non-magical creature to create on its own. So I decided to merge the ones I possessed with living human beings - maybe I could make them produce their own magic and use it to create more artifacts! Sadly, I lost most of my artifacts once the test subjects died due to rejection.

"Thankfully I decided to never use the Eye of Ra in any kind of experiment and, thanks to it, I saw that Dr. Twilight was afraid that I would find out that she was withholding information from me! It didn't took long to force her to tell me everything she knew about those Dazzlings! You know the rest of the story, because you're living it right now."

"And I also know how this story ends!" Sunset said. "We're going to crush you, and you will never make anyone else suffer! Ever! Specially because we now have the Stone you're using to control Adagio!"

Trixie threw the Red Stone on the floor and stomped on it, shattering it into dust. But Adagio still didn't moved a muscle. Sombra chuckled again.

"Did you really thought I'd come unprepared?" Sombra took off his suit and shirt, revealing his well-developed muscles and the bulletproof vest he wore under his outfit. There were also three Red Stones attached to each of his arms: one on each forearm, biceps and shoulder. "I am President Sombra, CEO of Umbrum Corporation, do not underestimate me!"

Adagio gasped, as if she had just been brought back from the land of the dead, and immediately flew toward Sunset Shimmer, who grabbed the siren's wrist when her claws were inches from her face, stopping her just in time.

"Trixie, you handle Sombra. I'll take care of Adagio!"

Trixie nodded and stood in front of President Sombra, who assumed a fighting stance once again.

"It's just you and me now, girlie." he said. "Let the monsters fight their own battle!"

"If we're going to talk about monsters, let me tell you this: the only monster in this room is standing right in front of me!" she said, getting ready to fight.

"I am bigger than you, stronger than you and have mastered seventeen different fighting styles, not to mention the Eye of Ra, that can give me quite the advantage. What makes you think you can beat me?"

"Sincerely, there's no way in hell that I can beat you!" she said with a shrug. "But that doesn't mean I won't try, right?"

"You got guts, kid. I have a job for someone like you, accept it and I'll spare your life!"

"Nice try, Sombra, but no!"

"Then it's your funeral!"

Dr. Twilight and Dr. Zecora could do nothing but watch as both Maidens battled their boss and their fellow worker, quietly cheering for the masked heroines to be victorious. That didn't seemed very likely, though, since Trixie could do nothing but avoid Sombra's punches and kicks and Sunset couldn't really hurt Adagio, since the scales covering her skin were too tough. Twilight suddenly had an idea and grabbed a pen and a notepad from her pocket.

"I know that of all your goals, knowledge is the prime." Zecora said. "But do you really think this is the appropriate time?"

"I'm going to help them in the only way I can, Zecora." she said. "And that way is studying!" she started scribbling on her notepad. "If Sombra is remotely controlling Adagio, then it means she is receiving orders through a 'signal'. Signals can only be transmitted if the destination has a receptor, like an antenna! And unless whatever is receiving those 'signals' in inside her body, there's only one option left." she took a deep breath and yelled: "MAIDEN DO WELL! AIM FOR THE RED STONE!"

"Can do!" Trixie said, then tried to kick President Sombra's arm. He blocked her foot with his hand, grabbed Trixie by the ankle and threw her against the two scientists. Twilight and Zecora, instead of jumping out of the way, stood there and caught her. "It didn't worked..."

"I was actually talking to the other Maiden..." Twilight explained as she helped Trixie up.

Sunset heard that advice and was now focusing her blows on the Red Stone Adagio had on her chest, but the siren had gotten better at blocking. Sunset Shimmer couldn't do it on her own anymore, and they all knew that.

"Miss Maiden, if you would like, I think I can help you now!" Zecora said. "But for that to work, I need you to hold her down!"

"Sure thing!" Sunset said. She jumped over Adagio and grabbed her from behind. She wrapped her legs around the siren's waist and immediately applied a Full Nelson on her. Adagio tried to shrug her off, but to no avail. She tried to flap her wings, but Sunset's body pressed against her back wouldn't allow her. Zecora ran toward them.

"My legs may not be as powerful as a horse's hooves..." she said before jumping with her leg stretched, successfully landing a flying kick on Adagio's chest. Her aim was very good too, because the stiletto heel of her boot hit the center of the Red Stone perfectly. "But even I know some good moves!"

Adagio's eyes lost their ominous red glow and her forced smile finally disappeared. The Stone on her chest was cracked, but it was still faintly glowing. The Maiden let go of her and she fell on her knees, painting.

"I... I..." she said as she looked around at the laboratory, the scientists, the Maiden Do Well fighting the CEO of Umbrum Corp. with the second Maiden already running to her aid and, finally, her two sisters inside the stasis tanks. Her siren instincts, which hadn't been that strong since she was banished to this world, told her to do only one thing:

Scream!

And that's exactly what she did. From deep inside her lungs, Adagio Dazzle summoned the loudest and most piercing shriek a human being could possibly vocalize, which was amplified by the power of her Red Stone. The Maidens, the scientists and the CEO were all forced to cover their ears with their hands, otherwise they would surely go deaf. Adagio's scream was powerful enough to make all the glass tanks - including the ones the other two sirens were in - shatter, sending glass shards and the green liquid they were filled with spread across the room. Dr. Twilight's glasses weren't spared either but, luckily for her, her eyes were closed, so she wasn't blinded by the shards. Machines all over the secret laboratory ceased to function and some of them even exploded. All the windows of the first, second and third floors and some windows of the fourth, fifth, seventh and sixth floors of the building above them shattered. Finally, the six Red Stones on President Sombra's arms and the seventh on Adagio's chest shattered as well, turning into small clouds of red dust that soon landed on the ground.

Adagio's claws and fangs turned back into nails and teeth. Her wings and her scales disappeared, leaving a naked and unconscious teen lying on the floor, her chest stained with blood that was pouring out of the hole where the Red Stone used to be located. It wasn't deep enough to threaten her life, but Zecora wasn't about to take any chances, so she scooped her up and ran with Adagio to the infirmary located not too far from there.

Sombra didn't had the same luck, though; the Red Stones in his arms were buried deeper in his skin than Adagio's, leaving behind much bigger wounds. He had lost blood enough to make him dizzy and his vision blurry, making it impossible for him to see the two Maidens standing right in front of him.

There was one fact about his immortality that he deliberately concealed: he wasn't completely immortal, he had just stopped aging. That's why he wore that bulletproof vest all the times. Sunset saw this after she grabbed the Eye of Ra that had fallen on the floor after the glass locket containing it shattered. She could also see President Sombra's worst fear: death!

"I was wrong." Trixie said. She then finished him with a kick to the face, knocking him out cold. "There was a way in hell that I could beat you!"

The two Maidens then carried the two unconscious sirens lying on the floor to the infirmary, where Twilight and Zecora were taking care of Adagio, then placed them on the beds flanking their sister's.

"So, what are you going to do with that?" Trixie asked while pointing at Sunset's utility belt, where she had placed the golden coin. Her partner grabbed said coin.

"This thing? I don't know yet." she said. "Maybe I'll destroy it. Or maybe I'll send it back to Equestria, Princess Twilight would love to study something like that! All I know is that I have to make sure that this won't fall into the wrong hands again!"

It didn't took long for the police to arrive at the scene and discover the secret laboratory underneath the Umbrum Corporation building. The Maidens escaped through the vents; they had offered Zecora and Twilight their help in escaping the building, but both refused.

"We took lives in the name of science too many times, and now it is finally time for us to pay for our crimes." those were Zecora's last words.

The police arrested Dr. Zecora and Dr. Twilight, as well as all the other scientists that were still down there. The only person they failed to arrest was President Sombra because, by the time they entered the last room at the end of the corridor, he was already gone.

Author's Notes:

Fooled ya, didn't I? Adagio loves her sisters far too much to double-cross someone when their lives are on the line!

Also, Adagio was naked because this thing always bugged the hell out of me: every time a character goes through some sort of tansformation that would normally rip their clothes to shreds, they always have a piece of clothing when they turn back to normal (or, in many cases, when they're still transformed). I just wanted to keep this a little more realistic (well, as realistic as a fanfiction about two girls - one of them an ex-unicorn - wearing a blue and purple spandex outfit fighting an immortal man and a winged girl covered in scales can be)!