Twilight Sparkle levitated the dark crystal, watching her reflection twist on its surface; when the sound of hoofsteps distracted her.

"TwilightTwilightweareherewearehere!" Pinkie shouted as she bounced down the stairs followed by the other girls.

"Hey Twi, Spike said you needed us. What´s up?" Rainbow Dash said.

"So glad you could make it. Here´s the thing, remember that door I told you about? The one that showed your worst fears?" Twilight asked.

"Yes. It was...awful." Fluttershy trembled.

"Well, here it is." Twilight said and levitated the dark crystal.

Understandably, all the girls backed down.

"Twilight, what the hay are yah doing with that thing?!" Applejack yelled.

"I went back to Crystal Kingdom and recovered it. I wanted to study it, to understand how it works."

"Twilight, that is dark magic. You shouldn´t be playing with such a thing!" Rarity chastised her.

"But I´m not playing Rarity, I´m studying. Preparing for King Sombra´s return. I´m not entirely sure he´s gone for, he may return and I need to be ready. I need to understand how his magic worked." Twilight explained, her eyes glowing an eerie green.

All the girls were concerned so Applejack moved forth. "Twi, Rarity is right. Yah shouldn´ be ´round that thing. Whatcha yah said you put it down, ´kay Twi?"

"...okay Applejack." Applejack smiled but instead of putting it down, Twilight moved the crystal right in front of the farmer.

"NO! No! What happened to Sweet Apple Acres? Big Mac, where are yah? Apple Bloom? Granny?"

Rainbow Dash rushed to push Applejack. "Twilight, are you crazy? Stop it!"

Twilight moved the crystal again, trapping the pegasus.

"What? W-where am I? Girls? Where are you? I´m alone...I don´t like being alone!"

"Twilight, stop this!" Fluttershy cried.

"Why? Don´t you want to know what are your biggest fears, your worst nightmares? That your animal friends no longer like you Fluttershy? Or maybe that nopony wants to be your friend Pinkie?" Twilight asked, her tongue growing long and viperish.

Both pink maned ponies cowered in fear but Rarity step front, using her magic to take hold of the crystal. Twilight tried to regain control and bot ponies struggled, the crystal moving back and forth in the air. Rarity began to cry, her mind assaulted by the crystal evil magic but finally she succeeded, pushing Twilight into the ground.

"Rarity, are you okay?" Fluttershy helped her got up.

"Ye-yes. Spike, be a darling and bring me a box to hide this awful thing." she said to the little dragon who had been hiding under the stairs the entire time. "Fluttershy, don´t worry about me. Take care of them." and she pointed at both Rainbow and Applejack who were still in quite a shock.

Rarity looked at Twilight who was unconscious on the ground.

"Rarity..."

"Yes, Pinkie?"

"What did you see? When the crystal touched you, what did you..."

"I don´t want to talk about it."

Twilight remained there, a small trace of dark magic escaping from her closed eyelids.

****

Twilight put the crystal down in the table. She wiped a few tears brought by the illusion.

"So that´s my worst fear...." she said to nobody.

She had brought the Crystal back from the Empire, hiding it from her brother and friends. Not even Spike knew she have it. Twilight wasn´t quite sure what made her brought that thing back but she did know it was a mistake. That thing brings nothing but misery.

She lifted the crystal, ready to smash it against the wall, she held it in the air, watching her reflection twist on its surface and then she put it inside a box and hide it behind a bookshelf.

"Twilight! Dinner is ready!"

"...coming Spike."

Twilight walked up the stairs, her eyes blinking in a dark green glow for just a second.