Mirror, Mirror

Twilight and her friends had already spent a whole night deep in a dungeon. It was cold and dark, even with the moon shining through the window. The guards nearby the cell were asleep. Another alicorn colt stepped inside, and glared down at them, but then lifted them up with compassion.

"Such a shame my brother and his personal magic puppet captured you. I've been planning to overthrow him for years, I have, but I've never been able to launch it because of fear in pony's eyes and my brother's power, Airtseuqe rarely has any peace.  Only once a few years does the Prince allow us a break from his brutal rule."

"Who are you?! Don't make me try to come over there!" Rarity yanked towards him, but failed.

"I'm Prince Eclipse. Please, I don't want to see you injured. Don't struggle against those enchanted chains, it'll only make it worse. The more you yank against them, the tighter they get." His ears pull back.

"You're Prince Eclipse? You look like a mess, and you're wearing those rags." Twilight responded.

"Our ruler allows me to keep my title, my home, and such if I serve him. If I was ever to do acts against him, he would likely give me a death penalty, or lock me down here for eternity. That's how life is around here, your Mirror life must be fantastic compared to mine, same for the rest of our fair land." He frowned. Twilight slowly, painfully, walked towards Eclipse.

"Where is Moonlight now?"

"On her way to bringing back the pony who opened the worlds, they would be greatly rewarded by the Prince because now he can have thousands of peons and slaves to obey him with the rest of this world. His main ones are Moonlight's friends."

"You dare tell my servants such information? I thought I told you to watch them, not give them the temptations of harmony. The Elements of Harmony were destroyed years ago, and harmony is dead." Prince Solaris entered, to see him talking to the mane 6. He was furious.

"Go! Go! I've unlocked you all, go, close the portal, and destroy the mirror. This land might actually have peace for once!" Eclipse unlocks their chains.

"GUARDS! Get them, get my slaves! Don't let them escape!" Solaris shouted, guards filing out private doorways. The Mane 6 run instantly and dodge the guards.

The Mane 6 are dashing towards the Throne Room and jump in the mirror, just after Moonlight Twinkle runs through with the pony. Twilight tackles Moonlight, and runs back through.

The Mane 6, now back home in Equestria, sigh in relief. The reflection of Eclipse appears in the mirror.

"Don't worry fillies. Solaris was thwarted, and peace will return to the land. But, I'm pretty sure you know what you need to do, to ensure that." Twilight nodded. She holds up the mirror with her magic, breaks it apart a little, stomps her hoof on it, and slams it against the wall. It shatters into a million pieces, closed, from then on for all eternity.