This story is a sequel to My little Venom: a monster inside

Nearly a year after the black symbiote was locked away, Twilight has managed to forget about the whole thing. But when an old rival returns seeking revenge with the help of a new friend it can only mean trouble. To make things worst they'll need the help of a symbiote.
edited by King of Kings

There will be slight hint to TwiDash

As a alternative to the magic duel episode.
The story continues.

The balance of the universe will be tested when the Lantern Corps' Power Rings come into the possession of certain members of the CHS Mane Seven while a dark and powerful evil looms around every corner. Only the combined power of the Lantern Corps and The Rainbooms stand any chance of stopping those who worship evil's might.

Avengers: Age of Ultron crossover.

Ultron’s plan had come to perfect fruition. There would be no more war, no more chaos, because the ones who caused it all would be gone. In just a short moment, the world would be saved from its true demon. Humans.

It would have all been so much simpler…if it wasn’t for them.

The Avengers.

As it is said, as it always will be, true peace can only be granted through countless innocent lives. In hindsight, the ponies were never that different from humans. Ultron’s plan is not yet over, and soon his strings will be severed…for the last time.

Big shoutout to Shrekzilla for his amazing job on the artwork!
Sequel: This War of Ours

In 2185, during his campaign against the Collectors, Commander Shepard discovered a previously unknown species whose origins predated any other race in the modern galaxy. Following a daring rescue from their ancient sanctuary, the Equestrian Herd was brought back into the galaxy where, for the first time in eons, they must walk their own path.

Knowing full well the terrible threat that lingers on the edge of the galaxy, the leader of this newly freed race fights to secure her people’s future while attempting to prepare for the storm on the horizon.

This is her story.
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The long awaited Sequel to Mass Effect 2: The Equestrian Equation This is a reader directed story. Your choices will shape events.
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Also, this series has its own TVTropes page now! (Special thanks to user CrowMagnon for setting it up).

Sunset Shimmer and her friends have entered college, but after a series of messages about a war in Equestria, Twilight Sparkle's messages suddenly stop coming altogether. However this seems to be the least of Sunset's problems as world shattering events start to occur in the Equestria Girls universe, forcing her and her friends to make difficult decisions to try and escape the coming fire.

Set in the Equestria Girls counterpart to the world of Fallout: Equestria by KKat.

This story is a sequel to Spiders and Magic III: Days of Friendship Past

Companion one-shot to Spiders and Magic: Rise of Spider-Mane, Spiders and Magic II: Eleven Months, Spiders and Magic IV: The Fall of Spider-Mane.

There are two individuals from entirely different worlds. One is rumored to be the greatest hero in history while the other may just very well be the most powerful being on the planet. They met by chance, and circumstances led them to form a bond. Over time, it blossomed from a budding friendship to a loving relationship. There are flaws apparent, specifically the occasional clashes in their similar yet different personalities. These are forty reasons why Peter Parker and Twilight Sparkle should (and should not) fall in love.

*Thanks to Kestrel, Darth Cygnus, Commander Stelios, Regreme, Vandenbz, Lord Lycaon, The Slending Angel, cosmic flash, Derp McShirk, NeilHD, and Dark Seqvus, for editing!

Collab with Azu

Cover art done by Mesiasart.

Princess Luna decides that risking the lives of the Elements of Harmony time and time again is hardly the most sensible or strategic response to the threats Equestria faces, leading her to seek an alternative solution, one which will ensure Equestria's protection in a more efficient manner.

The vagrants and outcasts of Equestria then find themselves presented with a proposition, one which could ensure their futures and prosperity... Assuming they survive the tasks requested of them that is.

Additional tags: Princess Ember, Bon Bon / Sweetie Drops, Changeling.
Old Cover Art
TvTropes Page

Peace has returned to Canterlot High School and nobody fears Sunset Shimmer since the Battle of The Bands, but a new threat know as Decepticons, lead by Megatron, wants to conquer Earth and the rest of the Universe. Now Twilight Sparkle and the Rainbooms must join with Optimus Prime and the Autobots in their galatic civil war that last eons. Will the heroic Autobots prevail and bring peace to the Universe or will the evil Decepticons win this war and conquer Humankind?