MLP/Undertale crossover.
Not a PWNY-verse story.

Long ago, the Monsters and Humans fought a great war. The Monsters lost, and were sealed in the Underground. It would take the power of seven human souls to break the barrier that kept them imprisoned. They only had six. And so the Monsters waited and hoped, praying that another human would find their way to the Underground. Some thought the seventh soul would give their King the strength to break the barrier. Some dreamed of a human who would be their friend, and save them all...or had nightmares of one who would bring back the war.

...but nobody came.

...but somepony did.

Eons after the war, with no way to tell how much time had passed above, a tiny blue filly with wings and horn fell into the underground, calling for her Mama. None knew the poor creature's nature or origins...but her soul was powerful with magic, even more so than a human soul.

None can know what will come...of this little 'Woona'.

Cover art by Sanyo21

With Twilight Sparkle's ascension to Princesshood, little fillies across the world dream away with the knowledge that any one of them could become a Princess themselves, somehow, some day. Unicorns dream of sprouting wings and tasting the clouds, Pegasi imagine what it might be like to conjure from thin air, and the Earth Ponies...

Well, they've always been a practical people. "Keep your hooves on the ground and your head with your hooves," as they say.

But one little Earth Pony wonders how different her kind is from the fiery Pegasi and crafty Unicorns - What does an Earth Pony have to offer that they don't?

So, she does some light research on the inherent magics of ponykind, and how they tie together into the apex form known as an Alicorn.

She is less than pleased with her results.

--Rated Teen for some dark, dangerous, and mature situations which may not be appropriate for all audiences--

Hey check it out, a feature:
http://i.imgur.com/4YFRDyj.png

Most legends are born from a single small grain of truth, others are born from the pure imagination of a few ponies, but as Ponyville very well knows not all legends are that. When something saves Apple Bloom from a pack of Timberwolves will she be able to convince the others of what she saw or will she just have to find the truth herself?

The Supplement to this story is ready to be read. It's right here. Read it. I mean... if you want to. I'm not your boss.

I would like to give a big big thanks to Danupert for pre-reading chapters 4 through 12. Thank you so much.
Also want to thank Annoyed Changeling, Ratfinkdos, and Crystal Static for being willing to help with this story as pre-readers. Thank you very much.

(This story is sci-fi, and somewhat different to regular FIM stories.)
Aneki's world was small. It was spherical, and it only took a day to gallop from one side to the other. She had been taught nothing existed outside the sphere, but she wasn't so sure about that. Perhaps her world was a bottle, a container in which ponies had fled to live. A time would come when she gained the opportunity to investigate these things first hoof, if she lived that long.

Everyone knows that Sombra, the Tyrant of the Crystal Empire, got blown apart by the power of the Crystal Heart, but has yet to resurface. What everyone doesn't know is that he got blown across the sea of worlds, leaving fair Equestria behind. The problem is that when he awakens he has no idea who he is or where he ended up.

Will Sombra be able to let go of the past, and his hatred, in order to save a world he's never seen before? Or will the citizens of Tamriel have another villain to worry about?

While Twilight is testing a new long range teleport on the request of Princess Celestia something goes wrong and she is transported to a place where love and harmony is a thing of the past and killing is the way of life.

The Mojave Wasteland.

Now Twilight must find a way to get back to her friends in Equestria and survive her stay in the apocalyptic wasteland inhabited by everything that has learn to call this eradiated land their home.

(My Little Pony: Friendship is Magic crossover with Fallout: New Vegas)

Editor: Grammer_Nazi
Pre-reader: Bum
Cover Artist: Wadusher0