What would happen if Discord got shot with Nighthowler serum?

This story is a sequel to Stardust

When Equestria’s newest member of royalty asks for aid to be offered to her friends from abroad, the best and the brightest volunteer to serve. Captain Steel Song of the Dusk Guard are immediately mobilized to help XCOM defend their world from the enemies that besiege them. However, their first joint operation with the humans takes a turn for the worse and they quickly find themselves fighting for their lives against the full force of the monsters that threaten Earth.

(Stardust/Dusk Guard crossover)
(Coverart provided by a friend of Viking ZX!)
(While familiarity with both stories isn’t required, it is recommended)
(Many thanks to Arzoo for pre-reading!)
(All screenshots can be found at XCOM.wikia.com)
(Featured on 3/13/2013. Thanks everyone!)
(Now has it's own section on TVTropes as part of the Stardust series!)

Twilight Sparkle is summoned to Canterlot by Princess Celestia to receive new items to help maintain balance in the world with and learns about their origins in the process.

You know those stories of a guy going in costume to one place or another and having an essential missing piece to their outfit discovered? Yeah, well, this isn't exactly the norm. Ornstein is what our hero goes by, for he doesn't remember...well, much of anything. In this tale, one will follow his journey through Equestria, his memories, and his legend, all to find one simple thing...himself. But given a choice, will he return to his home, or will he remain in Equestria as the Old Dragonslayer?

Cover art is by Dawnweaver13. Used without permission. If they don't want it on this story, I'll remove it at their request. And if you, good sir or madam, are reading this, I'd like to say that this is an excellent piece of art!

For an evening with his guests, The Prince of the Shadows has the best idea for a game.

When he is found dead, however, the six guests have to find out who killed him if they are to escape the Canterlot Prisons.
But, as the evening continues, even the Hired Hooves are found dead.

Whodunit? Where? With what weapon?

By simple biological necessity, one can conclude that Scootaloo has parents. And, indeed, there is a couple in Ponyville who claim her as their own. But they adopted her long ago. The documents are in Town Hall for anypony who cares to look. So, whence came the winged Crusader?

To learn that, we must go not just to another time, but another place, for Scootaloo is as orphaned as an orphan can be.

Written for F*** THIS PROMPT! 11. Prompt: Scootaloo is an orphan.

Based on the classic number from Disney's Fantasia, this is my take on what would happen if Sweetie Belle tampered with a spell far beyond her capabilities. The ensuing chaos forces her to try and stop it before it's too late.

Episode J: The couragous Captain Lone Starr, regal Princesss Vespa, loyal mog sidekick Barf and helpful robotic companion Dot Matrix have taken a well-earned vacation after they saved Planet Druidia's supply of fresh air and defeated the evil Spaceballs. But far away on an unknown planet, the Spaceballs have survived. Undaunted by their latest setback, they hatch a new plan to steal air from another innocent world. And the only ones who can stop them are flying away in a winnebago... wait come back!

This is a sequel to the 'Catacombs of Zalgo'. So just a heads up.

He who establishes peace and order to the world shall lead history towards eternal harmony. He who contrives war and chaos to the world shall lead humanity towards unending strife. In the world where a harmonious land lays hidden and untainted from the planet's corrupted history, both provinces remained discreetly to maintain balance... until now.

Equestria has many mysteries waiting to be unsolved... but beyond the land's boarders lies dark secrets that are beyond ones comprehension. While the Equestrians inherently thrived immaculately in harmony for many generations, they lived their lives unaware of the dangers that revolved their land. The Equestrians postulated the world that it was once ruled by peace since the beginning of time... but they will soon be proven dead wrong.

Five months since Discord had fallen once more, the ponies in Ponyville were ready to get things started for the upcoming Heartswarming Eve. However, a new threat had risen from the depths, and things became unexplainable. Armies of brutal humans with futuristic weapons and transportation units appeared out of nowhere, capturing and taking control of Cloudsdale, Ponyville, and even Canterlot. What madness came about to start such a violent act? Who is behind the siege? And what will happen to the ponies? No matter what will happen, no pony will be safe.

Comments about the chapters would be appreciated, helps my motivations a lot :)

While on a camping trip with Jon, Garfield and Odie discover a doorway to a world very unlike their own. Here, it seems like paradise, but soon the two learn that they have a role to play for the future of this strange land.