[x] THEORY: The burning of Dhar or purifying it by whatever process Karag Dum has makes the temperature higher, could potentially be the reason why the desert exist.
[x] THEORY: A pseudo-Herdstone - the dwarves managed to create or use their secret resoruces to reverse engineer it, which combined with Morghur, lets them control nomadic beastmen or even create their own beastmen from wildlife or livestock.
[x] THEORY: The Beastmen and Morghur are illusions and runic trickery, The only evidence is that Morghur is not acting like his/her normal self, for instance, he/she is nonhostile, did not radiate chaos and Dhar aura, Borek is not mutated despite, Morghur supposed possesses a chaotic aura that can easily mutate, people. Morghur did not act hostile and aggressive enouch, he/she looks sane, he/she did not attack Borek, did not mutate the ground with he/she area of effect aura.
[x] THEORY: The dwarves of Karag Dum managed to, somehow based on the desert borders stabilize reality contradicting the nature of the chaos wastelands
[x] Morghur knows Borek enouch to be affectionate with him, although this might just be identification procedure, or just a security measure to determine the identity of whether or not the person is a dwarf of Karag Dum.
[x] THEORY: Morghur has been linked to Karag Dum's waystone, which is acting as a psudo-herdstone that is burning away Dhar instead of creating it. Morghur is possibly cleansed of Dhar, and sees dwarfs of Karag Dum as family. The waystone may have been the cause of the weird geography via Geomancy, and might be weaponized. Based on Boreks last words, this was a longstanding contingency plan held by the dwarfs of Karag Dum. He is ashamed because it's a desecration of one of the greatest relics of the Ancestor Gods, as well as binding the fate of Karag Dum to a Beastmen Demi-God.
[x] ACTION: Investigate by following the waystone ley line. It will be your guide through any possible illusion or trickery.
[x] ACTION: I'm going to have to check this out.
[x] THEORY: That's not Morghur. Morghur constantly changes his surroundings, Morghur does not make reality more stable near himself, Morghur does not display affection, Morghur does not not attack people, Morghur would never stay here unless he was bound, and if he was bound he'd be struggling constantly to get out. The shuddering of reality can be faked by Runesmiths if they wanted.
[x] THEORY: The Dwarves of Karag Dum did something to burn away the taint of Chaos, much as your Belt of the Unshackled Mountain does, but on a far grander scale. Perhaps it had an effect on the Beastmen here, Cor-Dum included.
[x] ACTION: We need to verify if the situation here is stable, or if it's something that will come back to haunt the Karaz Ankor and Empire if left ignored.
[x] Theory: The Dwarfs have control over Cor-Dum and is likely being controlled by Karak Dum's King or Leader, They are doing this to protect the Waystone and keep the Karak Ankor safe, there is an ongoing siege to take control of the waystone with a nearby source providing power to the desert to weaken the defenders.
[x] Action: Look for the source of the desert.
[x] THEORY: This could be a Rune-based Illusion with "Morghur" being a Runemaster. The Dawi of Karag Dum let the forces of Chaos assume that Dum has fallen and is surrounded by Beastmen forces so they don't all unite to attack the Hold together and instead only come in smaller groups to "test" themselves against another chaotic force.
[x] THEORY: The dwarves of Karag Dum are alive and uncorrupted by Chaos, but have resorted to truly drastic measures to survive, probably undertaken by their controversial "Rune Masters", which involves having these beastmen or beastmen-appearing creatures defending the karak for the dwarves. We can assume that this is all in favour of the dwarves by Morghur's easy acceptance and non-destruction of Borek as well as Borek's mutual acceptance of the beastman. The idea of Rune Masters being critically involved is the certainty that some form of magic was used to create this whole situation, including the odd weather, and the Rune Masters' lack of corruption is supported by the lesser level of ambient dark magic in the area, even directly around Morghur himself.
[x] THEORY: The specifics are hazy, but this is a known contingency plan that Borek is entirely aware of, but hoped hadn't been enacted. The result breaks all Dawi notions of acceptability, but Karak Dum survives in some capacity and continues to inflict attrition on every local and visiting Chaos force that want to take a swing at them, so it is considered a lesser evil by the pragmatic Karak Dum.
[x] ACTION: Attempt to contact the nearby Kurgan tribes for information.
[x] ACTION: Investigate further.
[x] ACTION: Gain more information.
[x] THEORY: Magical signs and, less reliably, intuition about Borek, point to there being something uncorrupted in that mountain in the middle.
[x] THEORY: Theory continued: Borek expected Morghur, Morghur favors Borek, Borek isn't chaos-aligned(he had the chance to prevent us from acting on Vlag, but he didn't, and was, in fact, happy about the result). Obvious conclusion, Morghur is aligned with Borek in some way apart from alignment to chaos.
[x] THEORY: When Karak Dum warned the others about Chaos, the other holds instead chose to freak out about the elven army that had just landed upon the shores of the old world. The elves were later revealed to have been chasing Cor-Dum. What if K-Dum tried to remove C-Dum so the elves would go away and the dwarves could send reinforcments up north. However, they bound the demigod to their waystone instead—possibly by accident, possibly on purpose, definitly with forbidden knowledge. They weren't able to prevent the great war in time, so they chose to double down and make Cor-Dum their protector.