Bark?

"Well," the old librarian said, a grin once more on her face.

"Yes?" Sunset leaned in, eager to hear what she had to say.

"I sure do hope I know about it. I am the one who invented it, after all."

Sunset's mouth literally dropped to the floor. She fell on to her butt and stared at Fluffy Diamond. It took several minutes before she could find words to express every thought bouncing in her head. Her brain went into a giant party mode, and it might as well have been controlled by Pinkie Pie.

"Her brain was controlled by me, silly."

"Pinkie, I am trying to tell a story, here."

"Well then, Lunar Sapphire, tell it right."

Sunset finally was able to have words, well parts of them at least, sputter out of her mouth. "Wha- Wait. Y- HOW?"

The old librarian looked around and said. "If I told you, would there be any fun in the celebration of making a portal to one? It took me years to get it right. Would you like to see the mirror?"

Sunset couldn't believe Fluffy Diamond had asked that. Of course, she wanted to see the mirror. "Duh, I have got to dominate some-" She slapped her hoof over her mouth, just realizing that she was giving out her wonderful evil plan, that this smart, but old pony could very well accomplish, probably faster then she could. " I mean-"

"Is Celestia giving you some hard times, Sunset?"

"Yes, Mam'." She nodded. " I just want some power and somepony to pay attention to me not Twilight, not my brother, Sunburst. Just me for once." She looked down, just noticing how selfish it sounded.

"I understand. The mirror is just down the hall, second door to the left, down the stairs, and first door on the right."

Sunset couldn't do anything except for hug the old mare. "Thank you." She whispered.

Trotting down the hallway, Sunset hummed a tune she had sung since a filly. She couldn't remember most of the words now, but the happy feeling she was experiencing at the moment, made her not care.

Then she got to the stairs.

They were crumbly, and if you didn't step carefully they would turn into a downward spiral, of pointy debree. Anything for world domination, right? She thought to herself as she took the first couple steps in the stairs. To make matters worse for the unicorn, it got darker, the farther she went down the stairs. Sunset performed a spell so that the tip of her horn produced just enough light to see a few steps in front of her.

This caused shadows stretched up against the wall, but there was one shadow that she noticed, that seemed to move. It followed right behind her, and she could not escape it.

"Sunset?" A voice asked.

Sunset jumped in mid-air and landed on a step with one of her hooves controlling all of the pressure. "OWWW!" She screamed in pain, it echoing off of the walls.

"Sunset? Oh my Celestia, I am so sorry! Are you ok?" the shadow rushed over to her.

The shadow got into the light, revealing a small tan unicorn. Her orange main fell over her eyes, but you could still see the sparkle in them."Pumpkin Cake?" Sunset whispered. "What are you doing here?"

"I overheard your talk with the librarian." the small unicorn said.

"No, no, no!" Sunset whispered. "How much do you know?"

"Enough to know that you should let me go with you."

Sunset stared at the filly. She could send her back, but she would probably tell Celestia. If she let her tag along, she could annoy her.

"Well?" Pumpkin Cake said. "You are hurt, aren't you?" she looked down at her bruising hoof.

"Yes," Sunset said quietly. "Look. If I let you tag along, you can't be an annoyance. "

"Really? I promise I will be the quietest and helpful filly you have ever met."

"I said if!" Sunset corrected. "But seeing that you already know my plan, and Celestia would love to yell at me even more, I guess I am forced to bring you along. Also, I need somepony to help me with my hoof."

"Thank you, thank you so much! I have never been to an alternate world. I wonder what it is like..."

Is it just me, or am I the only pony in Equestria that doesn't go in rambling on and on like that? Sunset thought as the overexcited foal yapped and yapped and yapped.

She continued to limp down the narrow and steep stairs, till she finally got to the bottom.

"I can't believe we are doing this" Pumpkin Cake continued to squeal, very excitedly.
"Hey, didn't you say you would be quiet and helpful?"

"Sorry!"

Sunset expected the door to be right there, however, there was a long corridor, until there was a door on the right. There were lots of doors on the left, to her surprise. Trotting down the dark hallway, with Pumpkin Cake behind, she came close to the door. "Alright," she whispered, as she opened the door with magic. The door flung open to reveal - nothing?

"I should have told you this earlier, but this is the right." The small filly said.

"WHAT?"

"Well you wanted me to be quiet, so I didn't tell you."

"Ok." Sunset paused, taking a big breath in. "Look, Pumpkin if there is something you think will be helpful to me, then say it. If you are incapable of doing so, I will send you right back to that prissy princess. We are doing this so that I can take over the world, not to pick dandelion fluff. "

"Oh, sorry." the fillies eyes got big, and she pulled on her "puppy dog" face.

"Whatever" they started walking back to the other end of the corridor. "Tell me, why didn't you decide to help your mom and dad with the bakery?"

"They have Pinkie Pie and Pound Cake. I want better things in life, Sunset."

"So you came here. Kid, that is the biggest mistake you have made. When Celestia put in the words at the bottom of your acceptance letter, 'Unleash the possibilities of wings',she meant Twilight. I have been there, the false hope of becoming someone everypony looked up too. It will not happen"

"I and my friends look up to you, Sunset."

Sunset let out a chuckle, how could somepony possibly look up to her? She stopped in front of the door, that she hoped was the one Fluffy Dimond was talking about. She opened it up and, yes, there was a mirror! "Thank Celestia!"

"Don't you hate her?" The young filly questioned, her head tilted to the side.

"Thank Luna, is that better?"

"No pony says that."

"Can we just go through the portal?" Sunset asked as she walked up to it. The power, the love, I can feel it from this world. I need to get there. I'm surprised the changelings haven't gone through here.

The two jumped through it, unsure of what may happen.