Mirrors

"Explain to me why we are going to Canterlot again." Rainbow Dash said, obviously annoyed.

"I can't explain now," Twilight replied, "I just have some things to do, you can all go do whatever you want, I'll tell you when we have to go.".

The train ride to Canterlot was about two hours long, but Twilight made sure that they got an early start. Now, Canterlot was in sight, it wouldn't be long.

Spike was tired, like always, and was sleeping on his seat.

Twilight nudged him, and he woke up.

"What does it take to get some sleep around here?" he asked.

Twilight ignored his question, "We're almost there." she said.

They finally pulled into the station, and stepped out.

"Alright girls," Twilight began, "I'm going to got talk with the princess, you can all go about your business."

"Why did you take us here if we have nothing to do with this?" Rainbow Dash asked.

"Because, just in case we need the Elements Of Harmony, I'll have you guys at the ready." Twilight replied.

They all split up into different directions, and Twilight began to walk to the castle.

She walked to the door.

"Oh hey Twilight!" One of the guards said, "What brings you here?".

"I need to see the princess." Twilight said.

"Well go ahead," The guard replied, "She's inside.".

Twilight ran into the throne room, Spike by her side.

"Princess!" Twilight said urgently.

"Hello Twilight! What do you need?" Celestia asked.

Twilight didn't reply, she just gave Celestia the reports.

Celestia began to read them, her face darkening as she did so. She turned back to Twilight.

"I never thought that they would stoop that low." she said, "They usually don't interfere with us."

"What?" Twilight said.

"Alternate Equestria has been a problem for decades," Celestia began, "They have been replacing ponies for years, but they are mainly very quiet about it. But now, they have got themselves noticed, the reason they do this is because their world can be destroyed by someone from this one. So they take ponies who have immense magical power, to ensure that they can't destroy it. That's how Starswirl The Bearded was killed, we assume."

Twilight's face turned almost pale due to shock.

"Why haven't you destroyed it?" Twilight asked.

"Because if I went in, they would surely kill me, and I can't leave Equestria leaderless." Celestia replied.

"You have to go inside to destroy it?" Twilight asked.

"Yes. It is very dangerous, and no one has come out alive." Celestia answered.

Twilight felt a rush of bravery, "I'll do it!" she exclaimed.

"Twilight, please don't. You have no idea what could happen." Celestia pleaded.

"Princess, I have defeated nightmare moon, Discord, and King Sombra, my couldn't I defeat myself?" Twilight said boldly.

"Because the alternate you has done those exact same things, only in a more violent way." Celestia replied, "Just go home and try to forget about this, I'll try to handle it."

Twilight and Spike left the castle.

"I guess you weren't overreacting huh?" Spike said seriously.

Twilight didn't respond. She was two busy deciding what to do next.