Humans.

Truth or myth? Ancient lost civilization or just an old pony's tale?

No pony has ever seen one, and most haven't even heard of them. But Lyra knows that these wonderful creatures are more than just old legends, and she's going to find out... and possibly drive her roommate insane in the process.

Cynical noble who hates everything.
Royal guard with big potential and a lot to learn.
Big, simple farmer with heart of gold.
Crazy self proclaimed time traveler.
Hotblooded, always second weather manager.
Expert lover and clumsy celebrity flier.

These six stallions will have to band together and discover true power of Elements of Harmony and Friendship to save Equestria from everlasting night.
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New NEW cover art provided by ScarletCommenter.

Now has a TV Tropes page!

This story is a sequel to An Affliction of the Heart: Volume Two

Swarm is the first ever changeling/pony hybrid, child of Warden the pegasus, and Kuno the changeling.

What does life have in store for this unlikely trio?

Twists, for a start!

King Sombra’s dark influence was obliterated by the Crystal Heart, and the villain is well and truly dead. But when he attempts to steal the afterlife of an innocent victim, a human spirit is left hurtling towards Equestria, where this unfortunate soul is revived into the only vessel available: the reconstituted body of King Sombra himself.

Thus, a cheerfully oblivious alien is crammed into the form of the most evil and malicious being Equestria has ever known. Not that Shining Armor and Cadence know this, of course. As far as they are concerned, the King is back and he’s lost his fricking mind.

Click here for the TV Tropes page!

After having a strange dream for years, Celestia has joined her guards in nearly every expedition to deal with strange occurrences. The dream had something fall from the sky, and it looked like something was inside the ball of fire, and it was alive. After heading to the Everfree, a blinding flash hits them, and then something crashes in the trees nearby. What is seen inside the fireball looked alive. Celestia and her guards are attacked, and something that is near death because of wounds stands between them. After the battle, Celestia takes this thing back to Canterlot, and her doctors take care of him. What lies in wait for this new creature in this world? Come and find out,