Coverart belongs to PostScripting and can be found here. Thanks to Pickle Tickler for PMing me the link.

My week has gone from bad to worse. First I get a horrible cold that leaves me bedridden and unable to sleep for the last two nights. Then, as I was listening to a reading of a fanfic, I suddenly find myself in the Everfree Forest, in the body of a Changeling, feeling like my whole body is on fire.

Worse, I've apparently got a egg entrusted to me by Chrysalis from before the invasion that's about to hatch and it's a Royal Egg.

Well, at least I don't have to worry about my cold anymore.

Sex tag for sexual references.

In Popular Stories 30/12/2019? A surprisingly nice gift for the end of the year. thanks, everyone

"Sub-Level Five doesn't exist." That's the official statement of the Stairway company.

Washing out from the Night Guard program is usually a death sentence to any similar career. When Astral Sentinel was asked if he was interested in a security job, the Thestral obviously jumped at the chance.

There was just one oddity about the job. Well, there were quite a few, but mainly just one.
He just never, ever could acknowledge the existence of Sub-Level Five.

When a complete lock-down traps the Thestral inside the odd facility, he has to break that one rule. As the security systems begin to eradicate all life inside the building, Astral has to venture down to the elevators that officially don't exist, to a floor nopony alive will speak of.

He soon finds out that some things are best left buried beneath rock and stone.

*Warning. Hitchhikers may be escaped convicts.

"This story is simultaneously horrifying and adorable." -Witchery

Takes place far after Season 9. Although, it could take place at any time...(or in the Radverse, as some people call it.) This thing took on a mind of its own.

Seriously.

Read on if you want to join Astral for the ride.
I hope you brought your crowbar.

In later chapters, loose spoilers for Timeless, Sunspots, and Cure for a Toxin
Warnings for creepy atmosphere, gore, violence, and brief mentions of sexual content/assault (nothing explicit, only implied.)

Despite this being a horror story with unpleasant elements, it's not grimdark or a depressing tale. Lots more ups and downs, but overall it's a positive read of good vs evil, love and fluff; those are the types stories I write, after all. I just want to let everyone know what they're getting into, and don't want any readers blindsided due to some of the content.
(Not a romance involving a 'herd')

This is a fic based on the Time Loop Files, the format of which was first codified by Innortal on fanfiction.net.
Here's a brief guide.
The basic idea is, one character (the Anchor, usually the main character of a fictional setting) is looping back to the very first moments of their parent series every time either they die or some kind of time limit expires. They of course end up monumentally stir crazy given enough time.
Eventually others start to loop as well.
The reset is not always perfect. Sometimes a loop's history will be different to the "prime" loop, or canonical plot.
"Crossover" or "Fusion" loops also occur, randomly. These can involve the home loopers having a guest, or the anchor for one universe spending time in another, or replacements of one character by another.
Vacation Loops are where the Anchor (or others) decide/s "buck it" and lets off steam by doing whatever comes to mind. There's little or no attempt to maintain the original timeline.

In addition, and particularly more recently, it should be known that this story has a collaborative element to it - people may submit loop ideas or loops, ideally at the Spacebattles thread (a link to the current version of which is on the Trope page), and they may become included.

There's two page image options, thanks to Filraen - the current page image has been edited by the original creator from this work of theirs.. The other one is here:
http://hourglass-vectors.deviantart.com/art/MLP-Loops-466030169