"-and she just left you a note saying she had gone through the portal to study it even though you specifically told her not to?!?" cried Twilight in surprise. "Why would she have done that?!?"

Rainbow, her friends, and the other Princesses were all in the throne room, discussing Sunset Shimmer. Apparently she had once been Princess Celestia's student.

"It is my fault she left..." said Celestia sadly. "I should not have shown her the mirror portal, but I did, and barred her from studying it. I had given her too much temptation to leave alone, so she just had to study it. I waited for her to come back, as it was far to dangerous for me to go into the portal, but she did not return, and the portal closed."

"How long does the portal stay open for?" asked Rainbow.

"Seven days, however, it appears that it has been open for at least one."

"We only have six days before the portal closes?!? When will it open again?"

"Thirty moons."

Rainbow's mouth dropped open in shock, along with the rest of her friends'. They needed to get back Rainbow's Element soon, as the other Elements of Harmony wouldn't work without it. And thirty moons was far too long to go without the most precious magical artifacts in Equestria.

"How soon can I go after her?" asked Rainbow.

"Now hold up, sugarcube." said Applejack. "Surely you ain't going without us!"

"Do you realize how dangerous that is?!?" cried Rainbow, turning around. "If all of us went, there would be a huge change in the magical balance! That could create havoc in both our world and the one on the other side of the mirror!"

"Unfortunately, Rainbow Dash is right." said Luna. "Especially considering that she knows the most about alternate universes."

"But Sunset knows what Rainbow looks like." said Twilight. "Wouldn't she be able to tell that Rainbow would have come after her crown?"

"We can use a disguise." said Rainbow. "But we need to get everything ready quickly. I need to go through the portal as soon as possible, so I have time to get back out."

Everyone nodded in agreement.

"Alright, then..." said Rainbow, turning back towards Celestia and Luna. "What will I need to bring with me?"

"We know very little about the world on the other side of the mirror." said Celestia. "So the mostly likely thing you should bring are bits or gems. Although... I do have something I would like you to bring to Sunset if you can..."

Rainbow nodded. "Of course."

"I will help you with your disguise." said Luna. "For a magic one will be best."

Rainbow remained perfectly still as Luna cast the enchantment on her wing encasement. A tingly-feeling passed over her as the disguise covered her, and she opened her eyes. She turned to look in a mirror that Luna was holding in her magic, and her eyes widened.

"Whoa..." she said in surprise. "That's good..."

Her coat was now pink, and her mane blue. Her cutie mark was three blue lighting bolts. Her wing encasement was also disguised pink. The most surprising thing was that her horn appeared to be gone.

"The illusion should last at least seven days." said Luna. "Will be plenty of time while you are in the other world. However, if you use magic, your horn will be revealed."

"Can't use my magic, huh?" asked Rainbow. "That's no problem. I'll just save using it until I need to."

"Now you just need a fake name."

Rainbow paused to think. "Let's go with Firefly. That sounds nothing like Rainbow Dash."

"Indeed."

Rainbow smiled at Luna, and turned around to see her friends walking into the room with Celestia following. She put on the saddlebags that Rarity had made to match her disguise, which were filled with bits and gems on one side. Celestia was holding a journal with Sunset's cutie mark on it in her magic, which she gave to Rainbow.

"If you could, please give this journal to Sunset." she said. "Anything written in it links over to a journal that I have. But if you need to use it, you can."

Rainbow nodded, and placed the book in her other saddlebag. "I know that Sunset is under Sombra's influence somehow." she said. "If I can find a way, I'll change her back to normal."

Celestia smiled, as Rainbow walked up to the mirror. She glanced back at everyone before turning back towards the portal.

"I'll be back with my crown." said Rainbow, before stepping into the portal.

She was greeted by flashing and spinning colors. This didn't faze her too much, as it had been like this went she had traveled to the other timeline. However, that time she hadn't been spinning. The colors flashed by Rainbow's eyes as she spun in a spiral similar to the trick of a corkscrew. The big difference being that she couldn't stop.

Alright, Dash! she thought, closing her eyes to block out the colors. You just need to get your crown back, and get rid of Sombra's influence on Sunset! It will be easy!

She opened her eyes again to see the colors spinning faster, and quickly closed them.

I really hope this ends soon!

She risked opening her eyes, just in time to a huge white light. Everything became blindingly white as Rainbow was pitched straight forwards, and went into the other universe.