What starts out as an ordinary afternoon for Twilight Sparkle and Rainbow Dash quickly turns deadly, as forgotten schemes of vengeance awaken and come to fruition. Rainbow Dash will learn the true purpose of the Wonderbolts, what it means to be a hero, and what it costs.

The residents of Ponyville are unaccustomed to violence, but recent attacks are shaking up the normally peaceful town. On top of this, Twilight Sparkle has been experiencing short bouts of memory loss and is getting concerned with her own health. The truth in the situation may be harder to bear, however.

An accident leaves Scootaloo fighting for her life, and while everypony tries to offer what help or comfort they can, a few may just learn something new: exactly what it means to be a sister.

Featured on Equestria Daily!

Thanks to a number of people who helped review this, including Logician, Ion-Sturm, Vimbert the Unimpressive, samurai anon, Present Perfect, and Chris.

Discord, for a master of chaos, was actually a very good planner. Despite the confidence that he would bring Equestria to its knees in mayhem, several millennia of experience had taught him to have a back-up, no matter what. And after watching from the sidelines as Princess Luna became Nightmare Moon, he knew he had found an ace in the hole. Despite his defeat, Discord's greatest trick was still to come.

You know what this means: Equestria's greatest Nightmare is back. And this time, she's not alone.

Edit: Featured 9-27-2013, first time I've had a featured story. Thanks to everyone who's stuck by this story in spite of admittedly slow updates!

Twilight Sparkle and Rainbow Dash have tied the knot. After their grand wedding, they packed for their honeymoon, excited for what Princess Luna has planned for them. But, when they find out Luna had taken “honeymoon” literally, they realize their vacation place will be anything like they expected, and that they’re in for a fun and adventurous ride.Twilight and Rainbow will experience the most unique honeymoon a couple could have: on the moon!

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Some infos for new readers:
thestrals = batpony
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This fic is partly based on the IDW comics, namely the Nightmare Moon return arc. Since not all members of the bronydom are reading them I have linked a couple pictures for better understanding how some characters in the fic looks like:
Larry, Jerone and Buffy
Here besides Fluttershy we see Larry and Jerome with their new baby, Miss Buffy or for short Buffy. They were shadow creatures under Nightmare Moon's order and had done terrible things (for a kids show) which will explained further in the fic.
Here a closer look on the beautiful Buffy:
Buffy in all her beauty
You take the words out of my mouth, Fluttershy.^^
And cause all good things are three, a fanart drawn by Opallene:
The first offical gay family in MLP

When an accident reveals a disturbing truth, Scootaloo gets the news that she will never fly. Her newly found mentor and sister fill-in, Rainbow Dash, must confront a reality where both the hero and a dreamer are broken.

The night at the gala was ruined and Rainbow Dash is depressed. Though it seems her night will be mended by an unlikely source...