To change the future of Equestria

Celestia was sitting on her throne, accepting the papers that she was given. It was long day and it felt like it was just going to get longer. Tirek had just been defeated and the kingdom was not in the best of shape. She kept approving document after document to rebuild all that destroyed and put the kingdoms back together. It just seemed to go on and on as if there was a giant mountain of papers or maybe a sea of flooding papers. She just kept approving and approving more and more things. Then, out of nowhere, a shining light and suddenly a hooded pony appeared in the throne room. Celestia then looked at the hooded pony and then spoke up.

“Who are you? Why did you teleport to my throne room?”

Her guard stallions immediately surrounded the hooded pony. The hooded pony then talked in a rough and strong voice.

“Seems I made it, thank goodness. It's good to see you again Princess Celestia.”

Celestia, still confused then asked, “Who are you?”

The hooded pony took her hood off and then Celestia gasped.

“That's impossible. Who are you?” asked Celestia.

“I'll explain once you take me to the elements of harmony. We must hurry, or else Equestria will be destroyed.”

“Why? How? How will Equestria be destroyed?”

“By a unicorn called Dark Eater, who wields the Gem of Keys.”

“No......no, that's impossible, that gem has been lost for moons upon moons ago.”

“Well, it has returned and..... its going... to...” the hooded said and then fainted in front of Celestia.

Celestia then glared at her guards and then commanded, “Get my carriage ready, and prepare to bring her with me and you.” Celestia pointed at a guard, “Go get my sister and tell her to go to Ponyville as soon as possible. Messenger! Send word to the Crystal Empire, tell them we believe a threat may be coming to Equestria.”

The guards scrambled and immediately got ready for the Princess.

Some time later....

Twilight and the other Mane Six were at Twilight's new castle, cleaning the castle thoroughly. Then Celestia's carriage arrived at the castle. Twilight quickly informed everyone and they all went outside.

“Princess Celestia, what are you doing here?” asked Twilight.

“I'm sorry Twilight but a new threat may be coming to Equestria and I need your help.”

“Are you serious?” yelled Rainbow Dash, “We just beat Tirek a few days ago!”

“What may be coming Rainbow Dash is something even worse than Tirek.”

“Oh dear, something even worse than Tirek?” exclaimed Rarity.

“Yes but you need to see this first.” Celestia said and then presented the fainted hooded pony she brought with her. The Mane Six immediately gasped as soon as they saw her face.

“Huh?” said Rainbow Dash.

“What in tarnation?” exclaimed AppleJack.

“This makes no sense.” said Twilight.

“How is this possible?” asked Rarity.

“Wow” slowly said Pinkie Pie.

“Is.....is that me?” said Fluttershy.

“Yes, I checked her and well she is you, but older, um, Fluttershy.” said Celestia.

“Older?” said Fluttershy.

“That's impossible, time spells only last a few minutes, are you saying she's been here for several hours?!” asked Twilight.

“Yes, she has, I think she's here permanently Twilight.”

“Yeah that's right” said the hooded pony.

Everyone immediately looked at her at once as the future Fluttershy looked at them with angry, violent eyes. “I still can't believe it, it really did work. You guys are all here,” then future Fluttershy began to start crying. Tears fell from her eyes and she put her hoof  by her eye. The Mane Six saw her body and they all gasped at it. It was filled with bruises and scars all over. But then they saw the unthinkable on her. She had no cutie mark, as if it had been erased.

“Wow, I haven't cried in years. I didn't think I was this weak.” she said slowly.

“Why are you here?” demanded Celestia.

“Five years from now, Equestria  will be destroyed, and how it starts happens right now.” said the future Fluttershy. “I'm here to try and stop that.”

“Destroyed? How?” asked Twilight.

“A unicorn named Dark Eater is about to attack the Tree of Harmony and that will mark the end of Equestria.”

"How could someone know about the tree?" asked Twilight.

“Dark Eater? Never heard of him.” said Rainbow Dash sarcastically.

“He's already here, and he's coming after the Tree of Harmony. How he knows about it, we never found out. All we knew was that Dark Eater will come to this world and when he does, he successfully destroys the Tree of Harmony”

"Impossible!" exclaimed Celestia, "Is the Gem of Keys that powerful?! I know it always dangerous but is it that powerful?"

“Yeah, and that's exactly why I'm here to kill him before he gets to the tree.” said the Future Fluttershy menacing.

“Kill him?!” exclaimed the Present Fluttershy.

Meanwhile at the Crystal Empire....

The mirror to Equestria High stood alone in a room. The crystal guards were outside, bored. Then, without them noticing the mirror turned red and then suddenly magic came out of the mirror and immediately knocked out the guards. Then two hooded unicorns came out of the mirror.

“There we go, so that's how unicorn magic works... I like it!” said one unicorn. “Now, my little puppet, my little Sunset Shimmer, where are we?”

Then the unicorn looked at Sunset Shimmer, her eyes were dead looking as if there was no mind inside her brains, no thoughts, nothing. Her mouth then opened, “We are in the castle of the Crystal Empire.”

“Let me guess, that's a bit far from the Tree isn't it?”

“Yes”

“Oh well, I've got plenty of time, after all I have the Gem of Keys and as long as I have that, nothing can beat me. Let's go my puppet.”

“Yes Master.”