The Doom That Came To Ponyville.

Within the dining room of Canterlot Castle, the Sisters were quarreling.

Loudly.

This was somewhat assisted by Celestia’s expert use of the Royal Canterlot Voice, which was powerful enough that, sans Luna and herself, it was actually only hearable by five ponies in the kingdom and several kinds of oceanic mammals.

Well, Candace might have had a decent idea on what was going on, considering her crystal wine glass shattered into tiny crystally bits, spilling the expensive crystal grape wine onto the crystal floor to be cleaned up by a Crystal pony with a crystal mop.

However, the far more obvious cause of the noise was Luna’s own R.C.V, which caused, amongst other things, a mass suicide from half the noble kitchenware in the room and five minor rebellions within the capital itself.

Then again, all were stopped within six minutes of each other.

Blueblood, while at least somewhat intelligent, had legendarily horrible intuition on matters relating to the government.

Luckily, despite the general fears on what might result from the two bickering; this one did not involve obscenely powerful objects of magic, threats of worldly obliteration, or cake. Rather, it involved a tiny letter in Luna’s magical grip.

The letter was a tasteful cream color, and had a distinctive purple swirl emblazoned on it. Said letter, in Celestia’s opinion, was a cursed thing worthy of sending off to a rock-based fate. Perhaps something involving gravel.

Mostly because who it was from. The letters S. N were a clue for the clueless observer.

After several moments of collecting there collective breaths and thinking of ways to explain the minor tremors to there collective subjects, Celestia began to speak to Luna in a quite tone she would normally reserve for escapees from Tartaurus and disobedient students.

“Luna, do you know what you have done!?”

The second-youngest alicorn in existence gave her older sister a cheeky grin.

“Of course, dearest sister! I have invited an old friend to come to Equestria!”

Celestia, in a rare act of aggressiveness, stole the letter from Luna’s shimmering hold.

“Luna, there is a reason that we do not talk to them any more!” she said as she gave the little piece of paper a dirty look.

The lunar princess tilted her head. “Sister, merely because we have lost touch with them does not mean we cannot still be friends.”

Celestia, Sun Princess of Equestria, sighed. “We lost touch with them for a reason, Luna. A very good reason. Just because one of them decided to come closer to our spot in the universe does not mean you can invite one for a party.”

Luna gave a little high-pitched chuckle, one honed only in ways an immortal can hone something specifically to annoy her dear older sister in the most annoying way allowed by the laws of the universe.

“But sister, just because they might be bad company for you might not mean they are bad company for me.”

Celestia’s noble brow muscles tightened uncontrolably.

“Besides, sister, I knew you would protest to me inviting even the most discreet avatar of dear Shubby to Canterlot-”

“Knowing that the resulting chaos of a Outer God manifesting in Canterlot would almost certainly result in her dear uncle in our garden waking up and uncontrollable devastation across the world.”

Luna gave Celestia a dark glare, which caused a overwhelming feeling of guilt wash over her.

Luna took a little bit of dark pleasure at holding that card against her whenever possible.

“Anyway, sister, I have already made plans for her arrival, seeing that we will not be there to greet her.”

Celestia made a face akin to an elderly seizure sufferer being struck by lighting in the middle of a Grand Mal.

Luna tisked. “Oh, dearest sister, do not be so apprehensive! I have it all planned out. Besides, it is nearly time for your royal vacation, and I have had a trip booked for the Baahamas. Your favorite, I know, I have checked the history books.”

The dogged Sister stopped showing her visible apprehension to the idea, and instead settled for bottling it up deep inside.

The Baahamas were nice this time of year, after all. And it’s not like Equestrian society would collapse without her for two weeks, right?

“Luna,” Celestia said carefully,” you know that Shub-Niggurath will almost certainly cause chaos if she stays for even a week in Canterlot. Even if I would enjoy a vacation, I doubt you would be foalish enough to let even the least of her avatars spend a day here, let alone your proposed two weeks. And I hope you were not planning on bringing her to our little tropical vacation. ”

Luna never stopped smiling. “Sister, she’s not staying in Canterlot. Or with us, for that matter.”

Celestia’s brow rose again for the umpteenth time that night. “Pardon, Luna?”

“You see, sister, I have this all planned out. I understand she might need some help in getting used to ponyfolk, much like I did, so I advised her to take on her most mild of forms and personas and learn there ways before becoming too...brash.”

Celestia felt slightly better about the whole situation. Slightly.

“Oh, dearest Luna, I suppose I have mistrusted you judgment. However, even if she is as mild and as, forgiving the pun, tamed as you claim, I must wonder where you plan on her to stay for the next two weeks.”

“Oh, sister, I do hope that she can learn about the magic of friendship the same way I did when I first truly let myself open to the public. That's why I gave her the directions for Twilight's library! I have already sent the letter to Spike, I assure you.”

The tiny letter, a few seconds later, suddenly found itself in the heart of the sun.

One could imagine Luna laughing madly as Celestia attempted to murder her with a blunt object, but in fact Celestia, in her divine wisdom, settled on a glass shard from one of the mosaics in the hall.

......................................................................................................................................................

Meanwhile, a dark figure slowly trotted out of the dark heart of the Everfree Forest, heading for the household of one Twilight Sparkle in the vague form of a pony.

Or at least she believed it was a pony. How many horns did Luna say they normally had, again?

Ehh, it probably didn't matter, in the long run.