All life fades. This is fact.

Four alicorn princesses: The Sun, the Moon, Love, and Friendship. They share the weight of immortality equally. Equestria is in their hooves, and they're trusted by its citizens. It is their duty to defend and protect, for justice to prevail over all.

So when Applejack dies, it's not unexpected. But as the Tree of Harmony slowly withers, Twilight realizes she is the last Element of Harmony. Equestria is now left exposed and defenseless to attack.

With her cocky and dynamic student, Flash Freeze, Princess Twilight must slowly come to terms with immortality and find the five new Element Bearers before it's too late. And even though Flash Freeze loves her dearly, the youngest alicorn princess can't bring herself to commit to his tutorship.

Because all life fades. And so will he.

--
Artwork~
Twilight's New Student
Flash Freeze Today
Flash Freeze Sketches
Story Preview

Twilight Sparkle has too much magic, and it will take her decades to learn to control it. Her spectacular loss of control during her entrance exam only proves that fact. She is a danger to herself and others.

After Sunset Shimmer’s disappearance, Princess Celestia needs a new student to bear The Element of Magic to defeat Nightmare Moon. With all of Equestria at stake, Twilight Sparkle…is not the pony she needs.

Princess Celestia seals Twilight Sparkle’s magic with the distant promise of one day teaching her.

But there are two diarchs of Equestria. Amidst a lucid dream, an offer is made.

“Hello, Twilight. Would you like to be my student?”

Cover art provided by Lafiir.

This is a parody of avatar the last airbender, using ponies! Read as the avatar, Twilight Sparkle, travels on a journey to stop the water nation's war against the world. Constantly pursued by Nightmare Moon's daughter as well as the general of Water Nation will she be able to take and complete her first step towards becoming the avatar?
Special thanks to Duelist925 and Angel_Bunny for editing the chapters for me
Please enjoy!

Full collection:
Avatar the Last Alicorn:
Book 1.
Book 2.
Book 3.
Book 4.

Legend of Diamond Tiara:
Book 1.
Book 2.
Book 3.
Book 4.

Disclaimer: "Avatar: the Last Airbender" and all associated characters, storylines, and materials belong to Nickelodeon and were created by Bryan Konietzko and Michael Dante DiMartino.
My little pony: Friendship is magic and all associated characters, storylines, and materials belong to Hasbro, and was made incredibly awesome by Lauren Faust.

Diamond Tiara hates Applebloom. The Farm Filly is way too perfect Not to.
But when something happens that shakes that Hatred to the core, can Diamond find the real truth? And are forgiveness, and even friendship even an option?

This story is a sequel to A Guard and a Princess

Evil creatures raising from the underworld, a national sports event, an entire other dimension—what will cause the newly-married Twilight Sparkle and Flash Sentry to be apart next? Well, now that they are reunited after Princess Twilight received her new castle and role, hopefully nothing.

This story is the sequel to A Guard and a Princess. It is written in third-person, and occasionally includes the footnote style of The Celestia Code, a story that I would highly recommend if you like Twilight Sparkle. It also takes place after season 4 and Rainbow Rocks, with a little bit of a timeline mix up that you all will surely ignore because you are awesome people. It does contain minor Rainbow Rocks spoilers.

Artwork by: Emkay.
Edited/Pre-read by: SpitFlame and Gemstone the Unicorn.

First Story: A Guard and a Princess.
Second Story: A Prince and a Princess.

A thousand years ago, Princess Celestia banished her sister to the moon, that much we know. What wasn’t known, and what Celestia kept secret was that before her banishment, Luna had given birth to a foal. Now a thousand years later, as Nightmare returns to Equestria to bring about Eternal Night.

Twilight Sparkle, protege of Princess Celestia, struggles against the tyranny of this ancient foe. But how will she be able to save herself and her friends when the truth of this ancient legend crashes down upon her? Twilight will have to confront herself...and her heritage.

Polaris501

In the middle of the night, filly Luna is cursed by an unknown enemy. She will gain power faster than other Alicorns, and possess the powers of an Alicorn much older than herself. This power might become a danger. To protect her, her parents hide this curse from the kingdom, the castle staff, family, and most importantly, Celestia. But what happens when she can't control her power? Will she learn to control it, or will she become the monster she was cursed to be and leave Equestria to crumble at her hooves?

In case you couldn't tell, yes, this IS a Frozen parody. Please, do not judge me. Every chapter will be based off of a scene/song from the movie. Some chapters will contain parodized versions of some songs.

EDIT: There is now an Offical Soundtrack!

It was Friday night and Twilight Sparkle was at home enjoying the night with a good book and comfortable lounging chair. That was of course until her friends dragged her away for a night of fun. Now its Saturday morning and she has a powerful hangover...And a wife?

Join Twilight as she goes on a quest to discover. What Did She Do Last Night?

I-I don't believe this! I made it in the popular story section on 09/24/12

Now being edited by RandomSomepony4357

Celestia always loved her younger sister, but there were some things she had hoped never to tell her. Then one evening Luna asked her something truly dreadful to explain... Where babies come from.

Years before, after becoming a little older and hopefully a bit wiser, Spike fell into a state of hibernation, a common occurrence for a young, growing dragon. His cave sat undisturbed for far longer than he thought, though.

When he finally wakes up, there's... something different about this world.

How will his time asleep have changed his relationships with every pony he knows? With the pony he... loves?

All credit to cover image goes to Rameslack. Please give their work a look-see.

Complete rewrite of Heritage, featuring no rape. Rating may still change though.
(If you want the original Heritage for some reason, it can be viewed either here or on Fanfiction.net.)