#darkmlpau

The two sisters story in that universe, differenves are subtileOnce upon a time, in the magical land of Equestria, there were two regal sisters who ruled together and created harmony for all the land. To do this, the eldest used her powers to raise the sun at dawn. The younger brought out the moon to begin the night. Thus, the two sisters maintained balance for their kingdom and their subjects, all the different types of ponies.

But as time went on, the younger sister became resentful. The ponies relished and played in the days her elder sister brought forth, but shunned and slept through her beautiful night. No one—not even her sister, who loved her more than anything in the world—noticed how much it hurt her.

One fateful day, the younger unicorn refused to lower the moon to make way for the dawn. The elder sister tried to reason with her—but the lonliness in the young one's heart had already hardened into something else. Nightmare Moon.

Heartbroken, the elder sister harnessed the most powerful magic known to ponydom: the Elements of Harmony. Using the magic of the Elements, she defeated her younger sister, sent her sister to rest among the stars.

The elder sister took on responsibility for both sun and moon, and harmony has been maintained in Equestria for generations since.

____

Twilight had read the book so many times the spine no longer cracked when she opened it.

She sat with her back against the low stone wall, sun warm on her withers, pages held open in a small span of magic. Her hooves were free. She could turn pages without thinking. She knew the legend the way she knew her own name.

She wasn't looking for the legend.

She was looking for the footnote.

Predictions and Prophecies cross-referenced it. Three lines. Easy to miss. Tucked at the bottom of a page about lunar cycles she'd been reading for an entirely different reason. The Mare in the Moon. A myth. Technically. Old ponies' tale. Technically.

But the footnote gave a date.

The date was this year.

The date was two days from now.

Technically was starting to feel like a very thin word to be leaning on.

She needed the full text. Not the summary in this book — the actual prophecy. Word for word. The version with the conditions attached. She had a copy at the tower. She was almost certain she had a copy at the tower.

She closed the book. Tucked it under one wing of magic. Was halfway to standing.

"Twilight!"

Minuette. Twinkleshine behind her. Lemon Hearts a half-step past that. The three of them moving the way ponies moved when they'd already decided what the answer would be and were only being polite by asking.

"There you are." Minuette. "We were just—"

"Moon Dan—" Twinkleshine."—having a little get-together." Minuette talking over her without seeming to notice. "Is tonight."

"West courtyard. We thought that you should come," Lemon Hearts said. "You never come."

Twilight's ears tipped back. She wasn't going to apologize. There wasn't anything here that needed apologizing for. She had a book to find and two days to find it in. She was working out the shape of a maybe later.

The light in front of her changed color.

Cream and Grey. Both of them dressed like they'd stepped directly out of a very expensive photo. Jet Set arriving first. Upper Crust a half-beat behind. Twilight's ears swung toward them before she'd decided to let them.

Between one blink and the next, the three fillies weren't in front of her anymore. They were somewhere past Jet Set's shoulder. Their ears dropped a fraction. Tails gone still.

He hadn't looked at them. He hadn't needed to.

"Twilight." Warm. Like he was picking up a conversation from an hour ago instead of starting one. "Tell me you've heard about the Ashgrove thing."

"I haven't."

"You will. It's dreadful. Crust nearly had a fit."

"I did not have a fit." Upper Crust. Somewhere near his shoulder. In the exact tone of someone who had, in fact, had a fit.

Twilight's ears tipped forward. Automatic. The small, unconscious tell that didn't ask permission first. "What happened."

"Later." He was already turning. Already assuming she'd fall in step. She did. "You look like you're mid-crisis. Book crisis?"

"Something like that."

"Of course it is." Fond. Behind them, Twinkleshine's sentence had never finished. Nopony seemed to have noticed it hadn't. "Go to then books, then. Tell us at the party."

"There's no party."

"There's always a party." Upper Crust. Swept past her toward the tower path without waiting to see if that had landed as a joke.

Twilight let the book's weight settle more firmly into her magic. Followed.Somewhere behind her, Minuette was saying something to Twinkleshine. Low. Twinkleshine was saying something back. Neither of them were saying it to her.

None of that occurred to Twilight as anything worth turning around for.

She had a prophecy to find.

Everything else could wait until she'd read the whole thing.

___

The tower was white marble from floor to the first landing. After that, it was white marble with gold worked so thin into the joinery that it only caught the light at certain hours. Never gaudy. Never announced. Just present. The way good breeding was present.

The windows ran the full height of the reading room. Three storeys of glass in narrow panels. The shelves climbed almost to meet them — dark wood gone nearly black with age and polish. It was, unmistakably, the library of somepony who mattered.

Twilight pushed the door open with her shoulder. Already halfway into the room before it had finished swinging.

Celestia was sitting by the window.

A teacup held in a small ring of gold light. Doing nothing at all. No papers. No scrolls unrolled across the low table. Just the tea. The window. Spike tucked under the curve of one wing, working through a ruby with the single-minded focus of somepony who had been given the run of the house and knew it.

One of Celestia's ears had already turned toward the door before it finished opening. Her eyes found Twilight a beat after that.

"There you are, my most beloved student." The smile came with it. Unhurried. "What has you in such a hurry?"

"I need Predictions and Prophecies."

She was already moving past the older mare. Already reaching for the shelves. The book from the garden set down anywhere. Both forehooves finding the ladder rail. She didn't slow down to see whether the question had landed.

There wasn't room for it right now.

There was a shelf. Third from the top. Books she hadn't touched since her last research binge. The light was doing that thing where it made every spine look the same color.

Not there.

Her tail flicked once. Hard. With each wrong spine. She scanned the row again — theory, theory, a treatise on lunar tides she'd definitely misfiled — pulled three volumes out just to check behind them. Shoved them back in the wrong order because that wasn't the point right now.

The point was the book.

She knew it was here.

She'd catalogued this shelf herself.

There.

Thin spine. Embossed lettering worn soft at the edges. She caught it in her magic. Drew it down. Already flipping past the title page, past the table of contents, hunting for the section heading she half-remembered.

Behind her, Spike said something around a mouthful of ruby. "S'more of these, or—"

Celestia answered without so much as a pause in her attention. Warm. Immediate. A second gem lifting off the tray and drifting under her wing before he'd even finished the sentence.

Twilight found the page.

___

The Mare in the Moon. The heading. Myth from olden pony times.

Twilight read it out loud without deciding to. Habit. The same habit that made her narrate her own footnotes when she was working fast.

"A powerful pony who wanted to rule Equestria. Defeated by the Elements of Harmony and imprisoned in the moon."

Behind her, the teacup met its saucer.

A small sound. Precise.

Then nothing. No chair scraping back. No hoofsteps starting up across the marble. Just the light on the page changing, the shadow spreading wide across the top margin before Twilight had gotten two more lines in.

She leaned toward the window instead. Chasing the line with the tip of her horn. Kept reading.

The shadow grew. Over the gutter of the book. Over her own forehooves. Wider with every second.

Still no sound underneath it. Nothing to mark the distance closing.

"Legend has it that on the longest day of the thousandth year, the stars will aid in her escape, and she will—"

The book left her magic mid-sentence.It didn't struggle free. There was no tug. No resistance for her to notice. Just the weight simply gone from her own hold — and present in Celestia's instead. Lifted. Closed halfway. Before the final clause had even left Twilight's mouth.

"—bring about nighttime eternal," Celestia finished.

She'd shut the book before the last paragraph. Twilight noticed that. Filed it. Moved on.

Of course she knows it. She's Princess Celestia.The thought didn't slow her down at all.

"Some of these?" Spike held up what was left of a ruby.

"Of course." A second gem lifted from the tray without so much as a pause.

"That's the part I needed—" Twilight was already three sentences ahead. "—the stars will aid in her escape, that's tonight, that's the day after tomorrow, if the legend's even partly literal then—"

Celestia was smiling before Twilight finished the thought. The book still held open and weightless in her magic. No effort in it at all.

"My my, Twilight." Warm. Unhurried. The way she always said it. "You really must stop burying yourself in these dusty old books."

"I—"

"I would rather have your attention on something more immediate." The book closed. Drifted back to its shelf. Slotted itself into the exact gap it had come from. "I'm sending you to Ponyville, to supervise the preparations for this year's Summer Sun Celebration."

It wasn't what Twilight had been building toward. But it landed somewhere useful anyway. A task. A place to be. A reason to watch the sky in person instead of from a library window. "I can do that. I'll keep researching while I'm there, I'll bring the—"

"I know you will."

Twilight was already turning for the door. Already halfway into a packing list.

Celestia crossed the room to her. Unhurried. No sound to it.

A thread of gold magic caught a strand of Twilight's mane that had slipped loose. Tucked it back into place.

Another followed. And another. Small adjustments. None of them necessary. The collar of her travel wrap was smoothed flat — a fold set right that hadn't been wrong to begin with.

Her hoof touched Twilight's jaw. Just briefly. Just a brush. Light as a whisper. Enough to tilt her head up.

The sun was in her eyes. She didn't see the expression above her.

"Travel safely, my faithful student."

The warmth was still there. The voice was still there. The gold magic was still there.

Twilight felt it.

The touch lingered — just a moment. Celestia's hoof holding her chin. Just long enough to feel like it wasn't going to end. Long enough to feel like she was being measured. Checked. Approved.

Then it lifted.

Celestia stepped back.

Twilight was already moving toward the door. Already composing the rest of her list.

Behind her, she heard Celestia's voice — not loud enough to be fully awake, not quiet enough to be fully asleep. A murmur.

"Such a good little student."

Twilight didn't catch what came after. The door was swinging. The list was forming.

Then might have felt the way the words settled, like dust on a surface that should have been clean.

Behind her, Celestia watched her go for exactly as long as the doorway stayed open.