Tirek is defeated and Twilight is princess of friendship, but all is not well in Equestria. An ancient force has been released and prepares to plunge the land into misery. Only true friendship can stop it, but in order to do so, the mane six must confront the shadows within themselves. Old wounds reopen and old memories surface as our heroes face despair itself and find that the evil at work is greater than anypony could imagine. There are some spoilers in this story if you haven't seen the season 4 finale or Rainbow Rocks, as this takes place right after those. It has a lot of chapters but they are mostly very short, less than 2000 words each.

Thanks to Silverbirch for the cover art.
Update: Apologies for the abrupt and unfinished ending. College, work, and family has been very strenuous for the past 2 years and when I wrote the latest chapter I knew that I may not be able to get back to this for a long time. I intended an epilogue and sequel and to come back and improve the story, but time is something I have had little of for a long time. I don't know if and when I'll be able to complete this and I'm sorry for that, you deserve better. I will try to finish this and give it the ending I envisioned.
Update: It is complete, thank you dear reader if you followed me all the way through this journey.