Ninth Captain Fubar Jac'ass is a very good Angry Marine, he shouts his profanities, he kills the enemies of his Emprah real good, and he don't take no shit from no thrice damned Ultrasmurf. So why in the name of Terra has he been assigned to aid a little purple xeno Inquisitor that keeps having him do the most mundane things? And why does he keep going along with them, something here isn't right. And it's making him extremely angry.

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I don't own the title art, Warhammer 40k, or My Little Pony Frindship is Magic. Rated teen for lots of angry profanity and potential for bloody happenings.

When Twilight first began her experiments in trying to figure out better ways to access the Aether, the realm of magic and souls just outside their physical realm, she did not expect to make significant progress. After all, pony kind has been trying to find out the answer to that line of thinking for centuries.

When she felt herself connect to the other realm Twilight accidentally manipulated its energies in a different sort of way. The Aether bent to her will much easier than before. Getting just a bit too excited, Twilight played with the Aether a tad too freely and the reality-bending powers of the outer realm sucked her into its bottomless depths.

Fortunately Twilight was able to direct herself back to the material realm using the closest, and brightest, soul she could find as an anchor. And the second she looked up at the skull of the skeleton sitting on top of a golden throne, she knew life was about to get more... interesting.

(A crossover with "If the Emperor had a Text-to-Speech Device")

Life is crazy. Never mind the whirlwind that was winding up in Equestria in the first place; being married to an alicorn ex-princess doesn't exactly lend itself well to a quiet lifestyle. As such, your little hobby of building and painting Warhammer 40,000 models offers you some nice, calm respite.

Now, Celestia, who has been feeling self-conscious about not being able to relate to you, wants you to teach her about the hobby. You're more than willing to do so, and you're a very patient man.

Unfortunately, she isn't a very patient mare.

Cover art partially edited by Shadow of Death.

Princess Celestia: Goddess of the Sun, ruler of Equestria, beloved Princess of ponies. She is loved by all, and loves all in return. A calm and wise ruler, she sits on the throne in Canterlot, maintaining peace and harmony throughout the land.

What most don't know is that her past is much darker: She was once a commander of legions, a warrior and scientist of unmatched skill. Thousands of monsters and abominations fell to her forces, slain in the name of an old leader, one entombed within his own throne. Free of her old form, free of the powers of Chaos, she was cast into a new realm, in a new form, with a new lease on life.

She is the God Emperor, Eternal Ruler of Equestria and Lord of the Imperium of Man.

Has a TvTropes Page. Please contribute.

Comments contain spoilers. YOU HAVE BEEN WARNED!!!

This story is a sequel to Iron Hearts: Book 1 - Planetfall

An MLP/Warhammer 40K Crossover, part 2.

Celestia has handed down her order. The Iron Warriors must be defeated and driven from the planet, lest the corrosive grip of Chaos infect their world. With great reluctance, Twilight and Company depart for the Iron Warriors fortress-factory in order to confront the Chaos Warsmith. However, in this mission it is not the might of the enemy that will be their greatest challenge, but their own burgeoning friendships with the admittedly less-than-saintly members of the 38th Company.
At least until the Iron Warriors actually consider them a threat. Then it's totally their military might that will prove to be their greatest challenge.
All the while, the Tau forces lick their wounds and plot their next move. They are far from defeated, and the Iron Warriors have little inkling as to the aliens' true purpose.

MORE EXPLOSIONS!!

(Dark humor warning; minor grimdark)
(Cover art by Nicholas Kay)
(This series now has its own TVtropes page!)
(This series is a contestant in the Tournament of Canterlot, a charity event to raise money for Syrian refugees! Go here for details and donations!)

It is generally not intended for the Mechanicus to be the ones making first contact with a new race of Xenos. Brother Gentoo has the dubious honor of being stationed on Equus, for reasons that nobody can really explain, because the explanation was taken out back and shot by someone three or four links up the chain of command. Frankly, he's done this song and dance before. The Mechanicus are used to bending the rules a little to ensure that the Imperium's gears continue to turn.

This is how Brother Gentoo ended up being the one to make first contact with the inhabitants of Equus--a group of oddly-colored, unusually intelligent equines.

And then one of them asked him how lasguns work.

This story is a sequel to A New Friend

Ten thousand years have passed since the golden age of ponykind collapsed and the horror of Old Night fell across the galaxy. Equus itself is now but a shadow of the shining beacon it once was.

The rulers of that golden age are long vanished, and few believe them to be anything more than myth and legend if they existed at all.

But one mare means to change that. None know her name, but none can deny her prowess or ability to lead. All will one day call her by a simple title. The Empress.

In her heart though, the Empress, the mare once known as Twilight Sparkle, will carry that title even though she feels she does not deserve it.

This story is a sequel to Entrenchment

The 38th Company brought many strange and novel things to Equestria.
Technology beyond Canterlot's wildest fantasies. Horrors beyond its bloodiest nightmares.
War, strife, blight, and the dominion of monstrous gods long hidden from the eyes of Equestria's innocent populace.

But the planet known as Centaur III knew the touch of dark magics and evil cults long before the Iron Warriors took their first step upon its soil and constructed their blasphemous idols.
The plot to plunge the world into darkness left many wounds and ancient grudges to fester.
The story of the thestrals, the bat-winged soldiers of the Lunar Guard, is one of misery, bitterness, and betrayal. Their history is little more than desperate quests for power and anticlimactic failures, all mere footnotes now as the survivors quietly return to service under their humbled, purified Princess.

Alas, some scars do not heal.
You reap what you sow.

(Dark humor warning; limited grimdark themes)
(Cover art by MagicStarFriends)

Princess Celestia and Princess Luna are leading together a combined Army of several different equestrian Races against an supposedly terrifying and unfeeling Enemy.

What kind of Threat are our beloved Princesses are really going to face?

A Warhammer 40K/MLP:FIM Crossover.

Special Thanks goes to ARchy4288, Tyrannosaurus_Tux and AlicornPriest for Editing, Proofreading and otherwise helping.
I can only recommend those guys.

This story is a sequel to Iron Hearts: Book 4 - Emerald Dawn

An MLP/Warhammer 40K crossover, part 5.

With their plan established and put into motion, the 38th Company begins the long and unwieldy task of planetary defense, fueling the arcane energies that may yet unsteady the Empyrean and spare their fleet from an enemy without number or mercy. The inhabitants of Centaur III and even the abandoned aggressors help where they are able, but as their foes grow in number and destruction spreads across the planet, the war for the Centaur system has become a bloody race against time.
All the while, the grim culture of the Chaos marauders continues to mingle with the enlightened benevolence of their equine allies. Tempers fray and allegiances blur. But the die has been cast: Equestria and the Company will survive together, or be snuffed out together.
And even should they succeed, what future awaits these unlikeliest of friends?
For there is no peace among the stars. Only an eternity of carnage and slaughter, and the laughter of thirsting gods.

ALL THE EXPLOSIONS. JUST, ALL OF THEM.

(Cover art by Ahrimatt)
(This series now has its own TVtropes page!)
(This series is a contestant in the Tournament of Canterlot, a charity event to raise money for Syrian refugees! Go here for details and donations!)