Austraeoh is a lengthy ongoing My Little Pony: Friendship Is Magic fanfiction series by Imploding Colon. New chapters have been released daily since May 2012. There are currently four stories: Austraeoh, Eljunbyro, Innavedr (200 chapters each), and Odrsjot (ongoing).The official story summary is the laconic "Rainbow Dash flies east." Indeed, that's the only thing that happens for a while as the story begins: Rainbow Dash is flying in solitude across uninhabited scenic landscapes, and is about to reach the eastern edge of a map of lands known to the kingdom of Equestria. Where is she heading? Why has she left home? Why does she keep the Element of Loyalty on her? Any answers to these questions will not come early in the story.The author, Imploding Colon, is an alias of shortskirtsandexplosions, author of well-known fanfics Background Pony and The End Of Ponies, a fact that was not known initially and came as a surprise to many readers. The author has spoken almost nothing about Austraeoh, only briefly acknowledging writing it in some recent blog posts. Although the author never replies to reader comments, he seems to enjoy reading them, as hidden references to last chapter's comments occasionally appear in the next chapter. Starting from about the mid-point of Austraeoh (the first story in the series), most characters and places have been named after frequent commenters on Fimfiction.Net.
All Just a Dream: a number of chapters in Innavedr. Nightshade captures Bellesmith and plugs her into a sequencing machine to trick information out of here. As the chapters are through Belle's point of view; the reader doesn't learn it until several chapters later. As those chapters were released, some observant readers guessed it already at the first or second dream chapter, due to Kera behaving "out of character".
Authority Equals Asskicking: In addition to Prince Sam Rose from Silvadel, we have Prime Enforcer Shell. He's pretty much the leader of the enforcers, and is just as Badass as Rainbow Dash.
Badass: Rainbow Dash, so much. Also Steelteeth, Roarke, and definitely Prime Enforcer Shell.
Let us not forget Prince Sam Rose from Silvadel.
BFS: The Xonan general Zytharros has a magical sword "twice the size of any full grown pony".
Big Bad: Prime Enforcer Shell is this for the majority of Eljunbyro.
Big Good: Queen Whitemane seems to quickly shaping up to be this.
Bilingual Bonus: the titles are composed of Old Norse words. The meanings of Eljunbyro ("endurance (re)born") and Odrsjot ("frantic compansionship") are mentioned in the text. The others can be translated as "east horse" (Austraeoh) and "accomplish-wind" (Innavedr).
Door Stopper: As of this posting this story is six hundred and seventy-six chapters long. And it's still not complete.
Downer Ending: played with, but subverted. Austraeoh seemingly ends with Rainbow dying, but she gets better in Eljunbyro (although it isn't clear that she survived till halfway in Eljunbyro). In the end of Eljunbyro, several main characters get thrown off an airship, but the very ending reveals that they all (unbeknownst to each other) survived the fall.
Disney Villain Death: Enforcer Shell gets bucked off a bridge by Rainbow Dash in chapter 95 of Eljunbyro. He survives.
Dream Within a Dream: Bellesmith experiences a severe confusion of dreams and reality when Madame Nightshade plugs her into sequencing while she sleeps and makes her believe that the events of Eljunbyro and Innavedr were hallucinations experienced under sequencing in Blue Shelf. Belle is first driven to suicide in the dreamworld and then made to experience a false awakening in Blue Shelf.
Eldritch Abomination: the chaos monsters in Windthrow. Also, what Rainbow becomes when her pendant is removed.
Flash Back: several such chapters occur throughout Austraeoh, slowly unveiling the backstory. Then in the first half of Eljunbyro, we finally get the entire backstory in form of several multi-chapter flashbacks.
One Steve Limit: broken with the name Zetta, borne by two characters (one a stallion, the other a mare). Also, Bellesmith is usually called Belle, which generally stands for Sweetie Belle in this fandom.
Our Dragons Are Different: The dragons that appear in Austraeoh are, to make a massive understatement, not as friendly as Spike. The dragon Matriarchs are apparently ancient creatures older than the alicorns.
Pensieve Flashback: through a technology called "sequencing" in the country of Ledomare. Can only be done by unicorns whose horns have been lost or removed. Curiously, this can be done even if only a skeleton is left of the subject whose memories are accessed.
Pun: Lampshaded a couple of times. Once, Rainbow refers to "the Ten Commarements". Another time, she uses the phrase "to show the middle fetlock".
Samus Is a Girl: Roarke is female. ...Not that you can tell from all the armor she wears.
Significant Anagram: this doesn't come up in the story itself (and probably is just a coincidence in-universe), but Noble Jury, the name of Floydien's airship, is an anagram of Eljunbyro. The author named the ship after a chatroom of the story's fans, whose name in turn was created by putting Eljunbyro into an anagram generator.
Survivor Guilt: Rainbow has this big time, especially evident in Eljunbyro. She actually has a reason to blame herself too, having succumbed to Discord's temptation.
Shattered World: Equestrians generally know that the world is a plane, much longer in the east-west direction than in the north-south. In Innavedr we learn that this is only a part of the formerly ring-shaped world, long ago shattered into pieces.
Steam Punk: many of the civilisations east of Equestria run on steam power combined with magic.
Title Drop: In Austraeoh, this happens in the last chapter. Even then, the meaning of the word "Austraeoh" is not explained at all till Eljunbyro. In Eljunbyro, Innavedr, and Odrsjot, the title drop happens earlier. In all three cases, it's in the form of a character suddenly and unexpectedly uttering the title word.
Villainous Breakdown: Prime Enforcer Shell gets one in chapter 174 of Eljunbyro. And it only gets worse from there...
Well-Intentioned Extremist: Duke Zaap Nator, who is perfectly willing kill innocent foals in order to save his city of Drakstine. And Enforcer Shell is an even bigger one.
What If?: When Rainbow Dash abandoned her friends under Discord's influence and the others tried to use the Elements of Harmony against him without her, instead of just not working, the Elements kill them.