Spike sighed as Twilight paced back and forth in front of the World Mirror. "Come on, Twilight. Sunset's been here before and you got along fine."

Twilight shot him a glare. "That's not the point, Spike. This is the first time since the Memory Stone she's been back to Equestria. I want everything to be right. I'm not the same alicorn I was back then."

"Look the same to me," Spike grumbled. "So why didn't she and the girls come to your coronation? I know for a fact that you invited them."

Twilight sighed, as she stopped her pacing. "I asked Sunset the same thing. They wanted to come, and I even had plans set up with Pinkie so that they could fit in with no problem. But it was Finals Week at Canterlot High, and they couldn't miss it."

Spike winced. If it was anything like Twilight's time at Celestia's School for Gifted Unicorns, then he could see why they couldn't make it. "Ouch. So why is Sunset only coming over now?"

Twilight rolled her eyes. "It's Summer Break for the girls. I figured it would be a perfect time for them to finally see Equestria for themselves. Hopefully without any major disasters this time."

Before Spike could respond, the mirror shimmered a moment, before a fiery-haired unicorn stepped through it on two legs, before quickly falling back down to legs. "I will never get used to that," Sunset Shimmer grumbled.

Twilight giggled. "I know the feeling. Welcome back to Equestria, Sunset!"

Sunset grinned. "Hey, Twilight!" Before the two pulled each other into a hug. A moment later, they broke apart as Sunset looked sheepish. "So I hope you don't mind. But I brought a friend along with me. She refused to take no for an answer, no matter what I said."

Twilight and Spike shared a confused look before the portal shimmered once more. And out stepped... Twilight Sparkle? But this version wore a pair of glasses and had her mane done up differently. as Sunset helped her to a more comfortable standing position.

Twilight's smile became somewhat more strained. "Other me... Good to see you again." Her jaw dropped slightly as she saw the wings folded at her twin's side. "And you're an alicorn. That at least proves my theory."

Sci Twi, as Pinkie insisted on calling her, gave the resident princess a confused look. "What theory? And what's an alicorn?"

Sunset shook her head. "Remember that you have wings when you Pony Up?" Sci Twi nodded. "We had a theory that you have them because the princess does too, and the two of you are twins in all but coming from the same world."

Twilight nodded, as she unfolded her wings to show it. "An alicorn is a mix of all three types of ponies. The magical power of a unicorn, the flight, and weather manipulation of a Pegasus, and the strength and stamina of an earth pony."

Sci Twi vaguely remembered Sunset telling her all of this back after the Friendship Games. She also remembered something else, as her ears fell. "This isn't a problem, is it? Me being here. Being an alicorn? I can go back. I just." She sniffed. "I just wanted to see what it was like. I've wanted to know since the Friendship Games. I know it was only supposed to be Sunset, but I couldn't help myself." She turned around and made for the portal once more.

Twilight's ears fell, and she quickly pulled her twin into a hug. "It's not a problem. Sure, this is weird, and I do wish I had known you were coming. But we can make this work. Being High Princess of Equestria does have its perks, you know."

Sunset rolled her eyes. "So what's it like being Equestria's new Goddess Empress?"

Spike snickered as Twilight groaned, and even Sci Twi giggled. "Please don't call me that, Sunset. It's bad enough that ponies want to change my title to Queen Twilight. I am not ruling as Empress Twilight, thank you very much. Let alone as a Goddess Empress."

Sunset only rolled her eyes harder. "Whatever you say, Twilight. Can we get out of here, though? I'd rather see more of Canterlot than just this room."

Twilight nodded, as she lead the group toward the door. "With pleasure. I cleared my schedule for the door, so we have plenty of time. I only need to move the sun and moon this evening."

Sci Twi gave her a look. "How did you manage that?" As much as she knew of magic compared to once upon a time, the idea that the sun and moon had to be moved by ponies was still strange to her.

Twilight drew herself up to her full height. "I'm the Princess of Equestria. I do as I please. And if ponies don't like it? Who are they going to complain to? Me?"

That got a giggle out of the group, as they headed for the Dining Hall.

Sci Twi sighed as she got yet another odd look from the palace staff. "Maybe this wasn't such a good idea."

Sunset patted her on the back. "I did try to warn you. Having a copy of the princess walking around is going to cause ponies to stare. I wouldn't be shocked if the whole castle doesn't know by now."

Twilight nodded, taking a sip of her tea. "I have contingencies in case you girls ever decided to come to Equestria. I'm just going to say that you are a result of one of my experiments. And then once you leave, I can just say you all moved away so that you could all live your lives without being in our shadows."

Sci Twi tapped her chin. She couldn't argue with that logic. There were still some students at Canterlot High who hadn't figured out that she and the princess were not the same people, and that, no, she hadn't been there for the Fall Formal or the Battle of the Bands. It still annoyed her to no end.

Of course, she had long since stopped comparing herself to her princess counterpart. For all they shared in common, there was plenty that sat them apart, aside from the obvious. Despite that, however, they did get along. While they hadn't spoken much and even calling them friends was pushing it just a bit, the awkwardness between them had gone down massively since the end of the Friendship Games.

Sunset, meanwhile, watched a member of the guard come up and whisper something in the princess's ears. The scowl on her face said it wasn't good news. "What's wrong?" She asked.

Twilight bit her lip, wondering if she should bring this up at all. but she trusted Sunset. "We've been receiving reports from the southern Celestial Sea. Fishing boats are going missing or turning up with no survivors on board, and signs they were attacked from above. That was the fifteenth report in the last two days."

Spike nodded. "And it's not just Equestria's boats that are ending up like this. Even those from the Hippogriff Kingdom are being attacked. Queen Novo is not happy about this, to say the least."

Twilight nodded. She teleported a map of the known world to the room and unfurled it on the table before them so that Sunset and Sci Twi could see where this was happening. She began placing yellow markers on it. "Each marker is another report, and these are just the ones we know about."

Sunset frowned. "There's nothing down there that should be causing this. That stretch of ocean is empty."

Twilight nodded. "We used to think the same thing. But we discovered an uncharted island there one month ago. My Fluttershy organized an expedition to go and find out more about it, along with a student of mine from the School of Friendship." She paused. "They were supposed to call us and just confirm they were okay three days ago. They didn't."

Sunset smirked. "An island full of new animals? Yeah. Good luck getting Fluttershy away from that for any length of time."

Twilight and Spike chuckled. "Even if she did forget to, though. Ponies had strict instructions to call us when the time came if Fluttershy got caught up in this. No one has," Twilight added. "I don't like it. Something doesn't feel right."

Sci Twi, meanwhile, studied the map closely. Geography had never been her best subject, even less so in this world, but she soon noticed something. "Does anyone else see what I see?"

The others shared a confused look. "See what?" Spike asked.

Sci Twi looked at her counterpart. "Do you have a pen or something I can write with?"

Twilight conjured up a writing quill which she passed to her twin, who caught it in her own magic with surprising ease. She began down at the very bottom, where a small dot rested. Not far above that was the first report. "I'm assuming this dot is this new island, correct?"

Twilight nodded, wondering where her counterpart was going with this.

Sci Twi began to draw a line connecting each reported attack. "Look at this. Each one of these is following a pattern. These started not far from the island, and have worked their way north, skirting the Hippogriff Kingdom, before turning directly in a certain direction." She paused, giving the others a look. "And where do you think these will end up if they continue in this pattern?"

Twilight and Sunset followed the path, and neither liked what they saw. Sci Twi could see what she meant, as she continued to draw a line, following the same pattern, before it finally intersected land.

Princess Twilight's ears fell, as it finally clicked. "They're heading straight for Equestria."

***

Deep beneath waves of the South Luna Ocean, an underwater cliff exploded, revealing a long-sealed cave. Within, a pair of eyes soon opened, and a leviathan took his first breaths of fresh air in uncounted years.

Reaching out with a clawed hand, he poked his out. He felt the shadow of an ancient evil had awoken once more. One that he had fought for his entire existence to eradicate from this world. He had once destroyed those who had created him to end this threat.

Now, that same threat had been unleashed once more, and now his battle began again. With a low roar, he shot to the surface on a burst of flame and smoke.

Author's Note

Yes. Sci Twi is an alicorn in this. No, I'm not sorry at all. I was never a fan of what Hasbro did with her in Spring Breakdown. Among other changes for her character. Plus Equestria Girls in general.

Here are those changes. Spring Breakdown, Rollercoaster of Friendship, and Sunset's Backstage Pass never existed or happened in this universe. Legend of Everfree is only different in that Sci Twi and Timber Spruce aren't a couple.

Rest of the animated spinoff stays the same. This is what Sci Twi looks like in Equestria by the way. Art was done by CloudyGlow.