This story is a sequel to Divine Move
Gods cannot die, so what happened so long ago that ended in the total collapse of Pre-Equestrian civilization?
After many years of unspoken tension mixed with isolated peace, those that remained have received the cryptic message many never wished to see. When such events unfold, Princess Luna recalls a desire she thought she had all but buried and leaves Equestria without a word, only to be followed by the enigmatic and arrogant Sombra.
Now Luna and Sombra – whose ways have remained undecipherable to every princess so far – try to use what knowledge they have to save the world and themselves.
Book Five and Final Book of Sombra's Odyssey. The cover art is fan art drawn by dragonofruin with edits that were done by me. Beware of the numerous unmarked spoilers in the comments! With some help from: NorrisThePony and an anonymous user. The gore and violence tags are for descriptive injuries in the scenes featuring combat, which is only a small portion of the story. The original version was rated Pretty Good in this extremely spoiler-heavy review by PaulAsaran! Contribute to the TVTropes page!
I saw the title and I couldn't help but think of the D&D alignment system.
7454994 I've used it before on some of the characters, but no that wasn't what it was for.
7455003
I'm reading this on my mobile, so I might be wrong, but you definitely need to break that wall-of-text into smaller paragraphs to make it easier to read. There's also some grammatical errors, though. But I'll get to that in a moment.
Maybe something like this?
7455032 Thanks for helping with that! I split it into two paragraphs (currently) is there anything else I might need to clean up?
7455003
I've edited my comment, because my fat fingers simply love pressing big, green buttons.
Check it again.
Also,
More of a minor nitpick, but it should help out your description immensely.
7455052 Fixed! Thanks so much for the help!
7455003
I know it wasn't used for that, but I couldn't help but also be amused by it as well.
7455061 It is very amusing.
Mario 64 much?
So Luna is asexual?
7735878 Luna's orientation, while never a major plot point is listed as demisexual panromantic in my notes, so yes, she's on the asexual spectrum. However, Celestia and Twilight are assuming she's a lesbian based on what they know about her.
EDIT: While it's never stated here, she's asexual, but she was originally written as a very reclusive demisexual - her orientation was just never said.
So Celestia thinks Sombra kidnapped Luna. This is going to end so well...
oh, jeez, this was dark.
7752618 derpicdn.net/img/2016/11/12/1293658/large.png
She's very protective of Luna...even when Luna doesn't need protecting...
7752624
Heh. Big siblings are like that. I myself am like that at times.
7758327 But I doubt you have the power to raze entire nations with sun fire.
7758345
Nah, not really.
7758415 It happens.
I know this is a few chapters late but...
Best saved by the bell moment ever...
7758509 Saved by the Serpent would make a great sitcom.
Note to self: If I ever end up in Equestria during the events of the show...Make sure to invest in making a version of the Recollection spell from Magi-nation...it may just have been a cheap plot exposition device in that show but god damn it all if something like this could be used to throw Celestia's own horseshit right back at her I use it in a heartbeat.
Sombra doesn't like sand?! I could make a Star Wars reference here, but I'll refrain from doing so.
I lied.
Sombra: I don't like sand. It's coarse and rough... and it gets everywhere.
Hooray for 100K! That rhymes!
7814668 Thank you! It does!
7814665 He just thinks it feels weird - kind of like cats when they walk on unfamiliar surfaces and behave in a very finicky way. But yes, the Star Wars reference is appreciated.
Oh, my. This chapter started out pretty lighthearted, but ended on a really ominous note. As always, I eagerly await more!
Let's throw a party for our newest God of Knowledge!
7820519 I don't think the airship is big enough for a proper party. Whoops.
7820524 w
Awww... Perhaps just a small one, then.
7820529 Perhaps the next chapter will be a party of some kind...
Sweet Cadenza, Sombra doesn't like Starbutt too much, does he? I can almost see where he's coming from.
7822802 Those two have a hate affair for the ages ever since Tomb of Magic...
7822830
that it has been a long time since I read Tomb of Magic, and some of the details might have been blurred. Not to worry, for I shall read it again soon! 
It truly is legendary. Although, I must confess
7822837 tl;dr version: They basically drive each other to violence and false accusations.
Lol shining thinks sombra's suspicions
I like the bizarro-grimdark-fairytale vibes set up by this intro here.
Aww... but I wanna knowww!
Wow calm down there edgelord
Ooo now thats a cool closing line though
7862333
Maybe one day that story will appear. Maybe.
no u
Celestia, go see a psychiatrist. I think you're getting paranoid.
Although, you are right.
7885734 Exactly.
7885745
Exactly what?
Actually, don't tell me, it's more fun that way.
7885751 She is right... partially. You said so yourself.
7885768
I wasn't sure whether you were referring to my comment on her accuracy, or my comment on her apparent paranoia.
Yeah, I get ya.
tfw you wonder how long it's gonna take to catch up on this
7896851 Yup. Good luck with that.
Sassbra
That's Sombra's new nickname
He's so sassy I love it
Seems 'bout right.
Shipping princess doing her thing. Lovely.
k time to keep going xD
You're brilliant sometimes
Sassbra at his finest.