This story is a sequel to Forged Anew

Twilight has earned the trust and loyalty of both Hesperos, a former Rubricae of the Thousand Sons, and Te'kan of the Salamanders. In the idyllic realm of Equestria, the need for such mighty warriors is nonexistant. However, outside Equestria's borders are lands wild and dangerous. Worse, the galaxy the astartes call home has not forgotten them. Together they face the final fate planned for them deep within the maelstrom of the warp.

A Warhammer 40,000 crossover.

Equestria's last night is nigh. Next evening it will be ash. Twilight slips off with but the past to bargain with. Can she buy a future?

On the fourth day of the fourth month of every year, Equestria pays homage to its fallen heroes. As daylight sets on this solemn ceremony, the immortal sun bows before the soldiers who died for her, and whispers an ancient question for which there is no answer.

Daybreaker: the monster in Celestia's heart, and the age-long mystery of her life. Her friend and tormentor, her companion and foe. Fanatically devoted to their future, yet desiring one horrific to Celestia.

It is growing stronger.

"... at the forefront of our fandom’s writing scene ... Masterpiece." —PCaRG
"... really enjoyable ..." —City of Doors
"...worthy of high praise." —PaulAsaran
"Lots of wonderful world-building, great action, well-developed characters and an engaging story." —Hoopy McGee

Steel Song is a lot of things. Earth pony. Uncle. Professional bodyguard.

Retired.

So when he receives a mysterious package from Princess Luna a few weeks after the changeling invasion, he's understandably apprehensive. More-so when he presents himself before the Royal Diarchs to find that not only do they desire him to come out of retirement, but to take command of a most unusual position...

A position that may have more significance than any of them suspect. Because strange thefts are occurring on the Equestrian Railway, thefts that nopony can explain. Thefts that may have far more sinister intentions than their seemingly innocent nature may convey.

Intentions sinister enough to shift the balance of power in Equestria forever.

Book I of The Dusk Guard Saga.
Epic Fantasy
Has a collection of Side Stories as well, the first of which is here.
Now with a TV Tropes page!
"This is 100% Approved by Twilight's Library!"
Added to Twilight's Library 11/26/2013
Added to Canterlot's Finest 12/01/2013

Equis has fallen. Long ago, those few gifted with immortality left their dying world, searching for a new home.

That was ages ago. They have been adrift in space for an eternity, and they have found nothing to brighten their spirits. They are starting to lose hope that there is anything for them out here.

However, what they don't realize is that their journey has just barely begun...

-GM, master of Immortals.

Cover drawn by Little Duke! http://www.fimfiction.net/user/Little+Duke

Edit: Woah. It got on the front page. This has never happened before. Thank you all so much.

What does it mean to be immortal? Celestia has lived for too long. Her memories are old. She has seen many ponies, and many places, and many times, and many stars, and many dreams. She wakes one night to find she does not know the ponies and the stars of today from the ponies and the stars of any other day she has lived. She no longer knows what was real and what was only dreamed.

She desperately searches for the one pony she knows could not have been a dream.

At 3:15 AM, Adams woke me with a loud knock on my front door.
"Put your boots on," he said when I answered. "There's a biblical monster in my house."

* * *

A Visual Companion, by the author
Interview with the author, from the Royal Canterlot Library.
Audiobook by Robin Jacks and Wubcake.
Audiobook by Scribbler.
In-depth analysis by the Heroic Tales cast.
Literary Analysis by ScarletWeather.
Special thanks to GaryOak.
Reviews:
City of Doors
One Man's Pony Ramblings
PresentPerfect
Louder Yay
Between Lines
Bad Horse

The world spins, years pass, and everything comes to an end. Except Celestia. She sits on the shore of the last ocean, watching and waiting for her own chance at death. Because everything comes to an end if you wait long enough, and Celestia is patient indeed.

This story is a sequel to Iron Hearts: Book 5 - Suffer Not the Alien to Live

Personnel log C-921825

Designation... Gear Works
Detachment... 38th Company, Dark Mechanicus sub-division
Rank... [ERROR]
Tacticae Specialization... [ERROR]
Planet Origin... Centaur III
Personnel Status... Active
Current Deployment... [LOADING]

(An Age of Iron side-story/mini-series.)
(Dark humor warning. Some grimdark themes.)
(Cover art by Underpable.)