This story is a sequel to Iron Hearts: Book 3 - The Sept Lamman

An MLP/Warhammer 40K crossover, part 4.

The Tau threat has passed. The fleet that once thought to sweep aside the tainted pirates of the 38th Company has fled the system. The Lamman Sept is broken, demoralized, leaderless...
... And victorious.

With Lamman's plan put into motion, an alien horde hurtles through the Warp toward the Centaur system, its soldiers without number and thirsting for violence. Equestria's heroes must find a way to stop them, or the entire planet will be overrun with ease and its inhabitants butchered. While they could afford some pretense of neutrality and disinterest in the fight between the Iron Warriors and the Tau, now it is their world that lay in the crosshairs of the foe. Ponykind will need help to survive, and they look to the forces of Chaos for aid. But is there any hope to be found in the darkness?

EXPLOSIONS ARE IMMINENT.

(Dark humor warning; mild grimdark)
(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!)

This story is a sequel to The Sun, the Infinite, and the Divine.

Trazyn the Infinite and Orikan the Diviner are back in Equestria. That time, however, Orikan is frustrated. The poor thing is lost in the comprehension of what has happened to the time thingy after Starlight's bizarre adventure with Twilight... and Spike. Yeah... him... Forgot about our little fella.

Anyways, in brief: Orikan is confused about the wibbly-wobbly, timey-wimey stuff caused by magic, and everyone of importance is told about our bombastic duo.

This story is a sequel to Friendship For Gearheads

Barron Secht, Archmagos Dominus, has done things which less flexible Imperial factions would call Heretical. He has adapted designs from Xeno tech-heresy, offered to negotiate with the unclean, and he's even gone so far as to cancel an Exterminatus--on the grounds that the very Machine Spirits themselves willed the ship's thrusters to quietly die.

He has spent the past two weeks attempting to understand a new kind of xeno--a race of quadrupedal sapients who have no knowledge of the Warp, or of War--but they have shown a capacity for learning and understanding beyond what the Imperium has ever reckoned with. The one called Twilight Sparkle recreated a lasgun design long thought lost. What other knowledge do they hold? Secht cannot afford to lose such valuable tech-lore.

Suffice to say, when he learned about the chaos god living on the edge of Ponyville, he was not thrilled.

Contains my best guesses at what Warhammer 40K canon is. Special thanks to Opponent, who wrote the comment that inspired this sequel, and who graciously loaned me his OC to play with. Also, shoutout to the WH40K wiki, and my buddy Tupo over in Estee's discord server, because dear Emperor this game's lore is dense.

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.

Ciaphas Cain, Warmaster of Chaos and Age of Iron Crossover. These are various fics that I've crossposted on the CC:WC thread on Spacebattles.com, posted here for your entertainment and amusement.

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.

The mirror sent Sunset into the Warhammer 40K universe to meet her father.

An Ark Mechanicus commanded by Arch Magos Cassius discover a world rich in resources and potential. The only issue is the inhabitants.

Cover art is from the game Warhammer 40,000 Mechanicus.

Warhammer 40,000 is property of Games Workshop

MLP is property of Hasbro

EDIT: Inspiration
The original idea for this is actually from an unfinished comic on deviantart by someone called Telgin I found a few years ago. Basically I just kept thinking about what happened next and this is the result. If you read the comic then the first chapter you can probably see the similarities.

Also many characters have their parallels in the game Mechanicus as well.

Hope is the first step on the road to disappointment. The universe is full of hope, as it is with despair.

Far too often will the desperate fools of the universe lay their hands upon the key to their salvation...only to have it snatched away.

So when Ahzek Ahriman of the Thousand Sons encounters such salvation, he does respond with hope, but with determination. He will restore his lost brothers, he will right his ancient wrongs, and he cut down anyone who dares to stand in his way.

This story is a sequel to The Descent into Madness

Two years have passed since Rainbow Dash returned from a galaxy that knows only war alongside Applejack and the splintered remains of the once proud Swooping Pegasi. Now, as in the wake of her first return, the world of Equis has rocketed forward, combining knowledge and technology of both the ancient Eldar and the young and vibrant T'au. No matter how much any may wish it however, no one touches war and leaves it forever.

When ponies start showing up dead, torn apart in brutal ways that would put even the most savage of Everfree beasts to shame, the blame falls solely on a singular pony. Once more, Rainbow Dash must fight for her life and everything she holds dear. She is not the same pony she was in her youth, her actions heinous in the extreme and her mind shattered by the horrors of what she has seen and what she has done.

As old enemies rise and untied strands become knotted, lines will be drawn for every creature on Equis, answer will be given, and finally, the world will see what lies at the End of the Rainbow.
------------------
This story is a sequel to The Descent into Madness which is itself a sequel to Swooping Pegasus. Reading both isn't required, but I would highly recommend it.

Artwork has once again been done by the massively talented El Mutanto.