Consider the possible connections to the Naaru:
Ugh this lore is driving me crazy. So much speculation lol I have so many wild theories. I can’t wait to see how it all plays out. Lol at this point I play wow mainly for the story and not the game play. I’m not excited for the new raids or dungeons or zones I’m excited to learn more of the story 😂😂 I know lots of people hate on it but it has its hooks in me.
Nothing, it's a skybox, you can't even fly closer to it, everything else is irrelevant.
It’s the tip of sargeras’s sword 🤣
Sounds like this 'Emperor' needs a punch in the face.
Anduin Wrynn says: That crystal--Faerin says: Star. We call it a star. Beledar, the "Emperor's Vision" of holy light.Anduin Wrynn says: Yeah that's not a star. Faerin says: We—Anduin Wrynn says: It's not a &*!@ing star. A star is a gaseous, celestial body powered by fusion. That's a crystal, bub.
some crystal shoved down from sargeras blade
Dalaran got hit and lost a Tower on the Beach.Now we have this.Anduin Wrynn says: I wish Khadgar were here. He'd know what it all meant.Anduin Wrynn says: I'm sorry. I didn't mean to...Alleria Windrunner says: No, You're right. I wish he was here as well. We'll have to find our own answers.Khadgar dead?
Another answer: future raid dungeon
whole as especulation.we know azerite (aka azeroth blood, but also the crystalized energy of the world soul leaking) shares similarities with sargerite, argunite and so onbut what if that is not the only place we get those types of crystals?what if the naaru seek those too and use them in all of their stuff.... and the draenei just because they follow the naaruand since beledar is made of similar stuff as the other ships and somehow is affected the same way as azerite.... then when Sargeras puts the sword, it affected it too....
"Babe, wake up, Discordiankitty is posting lore speculation again."
Thinking on it and looking at the crystal in a very different way, maybe it's a uvula and Hallowfall's in the "mouth" of Azeroth. If there's a titan-esque (not necessarily a titan but something like them) in Azeroth and we've now dug into the planet a fair way yet haven't found it, maybe we're looking at it wrong. Maybe it's much larger than we thought and we're already inside the creature in Azeroth. There's no rule that the anatomy has to be humanoid, either. Granted, that'd be way out in left field. That'd be crazy to spend a good part of the expansion inside of a creature while not knowing we are until later.It's most likely naaru related at any rate considering the light/void transition. There isn't really any other creature that does the same thing, but maybe it's not a naaru per se. Maybe a seed for a naaru that may eventually create one, a proto Naaru making it older than the naaru we know of, or a probe perhaps for someone else outside Azeroth to monitor how the planet is doing. For all we know, we're looking at a malfunctioning turkey probe left over from the pre-Sundering days. It'd end up like that one movie with the apes worshipping the black pillar which wasn't really anything. Maybe the Arathi spent too much time around kobolds to really register their crystal was nothing to really be excited over ... although apparently the candles really do serve a purpose so probably not the best example these days. Or perhaps they're just so zealous they can't believe their crystal isn't some great thing which would then give Scarlet Crusade vibes. What's really known on the crystal is speculation at this point. Imagination can run wild very quickly, especially in a group and especially when it comes to zealots.I honestly still think to show Xal'atath as an actual threat she should eradicate the entire Arathi Empire just as we finally find them. We're in a trilogy of expansions. At least one should set us up to lose and set the stakes really high. We keep seeing these big bads that are supposed to be really dangerous only for them to make torch a few towns, topple a few towers, kill a few NPCs that end up quickly gotten over, and then frequently go out with a whimper quickly forgotten when the next expansion hits. Maybe she can blow up the crystal as the TWW finale causing the Arathi in Hallowfall to fall to darkness if they're not crushed by the ceiling caving in. Leave Khaz Algar unchanged but destroy the zones below it. To then access the zones pre-finale, we'd have to go to Zidormi or something. It'd be nice to see something more definitive for once and not another villain that really does nothing in the end. They're largely self contained to their expansions. Xal'atath has a chance to be more overarching and thus actually dangerous.
Another, smaller crystal
The answer, coming in 11.1
I say that the Hallowfall Crystal is a "Sarcophagus" that's built around the tip of Sargeras' blade similar to the Sarcophagus built around Chernobyl: designed to prevent the spread of the Fallen Titans' corruption into the deeper parts of the earth; likely built sometime during BfA and SL. The reason why the Arathi have been living around it for so long despite the blade being only a recent arrival probably has to do with some time-altering/time-travel shenanigans.
Too much of a light crystal. I doubt if Azeroth is a titan, that titans have such a huge affiliation to the light.