Firstly I would like to say that this is a very long post but it does go into a fare amount of speculation and conjecture. I have tried to make it so there are some aspects that clearly do link with information that is known; or alternatively could be feasibly seen to be something that might be deduced in someway from the sporadic and various snippets that have some level of information that may tie in with each other. In no way am I saying this is or isn’t the case but, I thought it might be something that others might consider or even reconsider in terms of the amount of control and power that certain individuals might have or have manipulated to have throughout the WOW Timeline.
The only entity/individual that capable of and even knows the process involved to forge Sentient Weapons such as Mourneblades within the Wow Universe is from what we have been made to believe is the PRIMUS exclusively. The reason we know this is because of the Shadowlands story arch that transpires between Zovaal and the Runecarver (The PRIMUS). In this story arch regardless of whether you take the concept that Zovaal is being dominated and controlled by the Primus (i.e. concept that the Primus is the True Jailer); or whether you believe that Zovaal was the Jailer and was using the Primus to achieve his own agenda the basis is the same.
In this story arch Zovaal manages to extract the required information from the Runecarver on the method required to forge a weapon capable of dominating or controlling its wielder to achieve the desired outcome of the original weapon crafter. This process was the information on the forging a new MOURNEBLADE and the only individual that had all the information and steps required to forge one was the RUNECARVER AKA The PRIMUS. Regardless of who was in control or manipulating the other the outcome was the same; the information needed was extracted by Zovaal which enabled him to create the Mourneblade that dominated and controlled Anduin. Zovaal didn’t pass the information in relation to this process to anyone else meaning that it was only himself and the Primus that knew it and with Zovaals death it leaves the only person who knows this process to be once again the PRIMUS exclusively and no one else in the Wow Universe.
Sire Denathrius was 100% also under the effects of DOMINATION by the PRIMUS and I think many have overlooked or missed a key aspect that points to this fact in game.
It was runes engraved on Sire Denathrius that controlled him but HIS SWORD - REMORNIA. They said that it was a SENTIENT weapon but, what are all sentient blades in reality including all the others we see in game? MOURNEBLADES and the only person that was and still is the only one capable of forging MOURNEBLADE weapons is THE PRIMUS. When these blades are forged we know that the Anima/Soul of a powerful entity is used to imbue the blade becoming the essence of the sentient aspect within the blade. However, we also know that as part of this process the actions of what this sentience does and attempts is part of the programming done during creation along with the various DOMINATION RUNES which is always inscribed on these blades.
So knowing that it was the PRIMUS that created Remornia for Sire Denathrius and the Primus having the ability to program it during creation to ensure the desired outcome in relation to what happens when the Mourneblade is used by the wielder. The Primus would have programmed the sentience within Remornia to control Sire Denathrius and ensure that he pursued a specific course of actions that aligned with the PRIMUS’s overall grand plan and desires. The Primus would have also been able to achieve this without Sire Denathrius being even aware that he was being dominated and controlled by his weapon. It is likely that he gave some level of freedom to Sire Denathrius but, controlled and made sure that he carried out the required actions needed for the Primus’s grand plan while being made to believe they were his own that he was making freely; ensuring that Sire Denathrius would be less likely to attempt to resist or fight against the domination effects of the MOURNEBLADE.
If you don’t believe me that Remornia is a MOURNEBLADE look at this picture -
This clearly shows the three RUNES that are clearly engraved on the blade along with of course being a Sentient weapon like every other Mourneblade that we know about.
If you want to take this concept even further you could easily deduce that original sword wielded by Sargaros called Gorshalach was also a MOURNEBLADE itself because it was SENTIENT like every other Mourneblade and like every other Mourneblade it had various Runes of DOMINATION engraved on it - In addition even the weapon that Sargaros wields after it was fragmented is a Mourneblade (Gorribol the Dark Seether) See this image as evidence of it being a mourneblade
Image of Sargaras before his fall to madness wielding Gorshalach:
Gorribol the Dark Seether Image:
Once again following the concept that the PRIMUS is the only entity capable of crafting a Mourneblade it would mean that there was clearly some interaction between the Primus and the Titan Pantheon of Order even in the very early days of their appearance and interaction within the wow universe.
Additionally it is easy to understand that the PRIMUS would ensure to put certain safeguards on a MOURNEBLADE as powerful as Gorshalach. One of which was clearly what would happen to it if its Wielder fell under the influence of a Cosmic Force that was outside the ones that he perceived were permitted. As when Sargaros fell to madness the Mourneblade shattered into Fragments TO PREVENT THE FALLEN TITAN FROM WIELDING IT.
Sargaros then received a replacement Mourneblade that was made from some of the fragments of Gorshalach to forge Gorribal the Dark Seether and the fact that this new weapon embodied the darkness that exists in all beings which one could easily say is the ability for all beings to be dominated, manipulated or controlled to carry out actions that aren’t not ones they would have normally done. This could further elude to the fact that Sargaros has been manipulated, dominated and controlled by the PRIMUS for a very very long time and has continued to be dominated even after the original mourneblade was shattered. However, this is more likely to be linked to the fact that there is traces of Void in all beings even noble ones; just like there is traces of Light in all beings linking back the the aspect that it all started from Light and Void and it was this that everything else was created.
So has Sargaros actually been a PAWN of the PRIMUS this entire time and was done in a way that the Titan Pantheon wasn’t able to fully comprehend or understand. Potentially they might have been told a totally different story about the abilities and effects that a MOURNEBLADE created by the PRIMUS has; obviously the primus ensured there was enough truthful elements within this information to make it fully believable but clearly left out the aspect of the interaction he can control in relation to the wielder of the mourneblades and his own domination and control of these individuals
Taking this line of thinking even further and understanding that part of the process in which a mourneblade is created is that it requires the Anima/Soul/Cosmic Essence of a powerful cosmic entity to provide the basis from which the weapons SENTIENCE is produced. Additionally we know that it requires that DOMINATION runes are engraved on the weapon to provide the required outcome and desires of the weapons forger.
So where is all this leading you may ask? If you take the above paragraph about what is involved in the process to create a weapon that is either a mourneblade or one that has the same end result but is a different weapon other than a sword. There is another Mourneblade even though it is not a sword itself; showing that these weapons can be anything and don’t have to be a sword blade as one would assume with the Mourneblade concept. So what weapon fits this profile?
I give you - Xal’atath, Blade of the Black Empire.
The weapon was Sentient like all mourneblades and followed the same aspects or rules for this as we have seen with all other mourneblades/sentient weapons. During the forging process the anima/soul/cosmic essence of a sacrificial source entity is trapped, imprisoned and bound within the weapon to become the source from which the weapons sentience is formed. Then with the addition of a desired sequence of domination runes engraved on the weapon it creates the forgers desired outcome in relation to what the weapon is capable, the control and manipulation the forger is able to exert directly or indirectly over the wielder. Directly the forger is actively able to take over the wielder and force them to carry out any actions they require of them without them being able to prevent it etc. While Indirectly the forger makes use of the imprisoned entity and forces it to carry out a sequence of programmed or desired actions over the wielder; which either means the entity controls the wielder to achieve the results which isn’t very common. Alternatively it forces the entity to manipulated and coerce the wielder into carrying out a sequence of events that fall within the programmed guidelines they are bound to achieve and continue to carry out.
While the second option of indirect control is something we have seen the most it also seems to be the most effective in achieving the original weapon crafters desires forged during its creation. However, we also see in this circumstance an element of free will and actions that the entity is able to do; this of course is provided those actions don’t contradict or go against the guidelines implanted and outlined during the creation process.
As part of this process the Domination Runes engraved form an active component of the control and programming the the weapon creator has over the bound entity with the weapon in addition to the level of interaction that the weapon crafter has over any individual that wields their creation.
For example it is easy to see that something that has been done as either a part of a larger set of rules or a single set of instruction that are imprinted/implanted as a binding guideline for the entrapped entity is a section in which it prevents the entity from divulging any information that could be used to identify how or even who was the entity that imprisoned them. In addition this guideline in each also prevents the imprisoned entity from being able to provide details or explain thoroughly the process that transpired for them to be imprisoned within the weapon or the creation of the domination guidelines that were forged and bound upon them during the weapons creation. This obviously is done to protect the identity of who created the weapon or the process and steps involved to create weapons like it; knowing that the only individual in the WOW Universe that knows the process and is capable of making these types of Weapons is The Primus and he guards this information so that no other individual may ever find it out. The set of guidelines that are programmed/imprinted/implanted on every one of these weapons ensures that any entity that is used as a source to form a weapons sentience is incapable of ever being able to say or do anything that would implicate the Primus regardless whether it is directly or indirectly; or divulging the full process and information in relation to how weapons like this are forged and created.
The image below shows the DOMINATION RUNES that are engraved clearly on the blade like all other mourneblades and sentient weapons we have seen or come to know about in game.
Personally there is a clear difference between Rune Weapon or Runeblades (e.g. Felo’melorn) vs Mourneblades or Sentient Weapons; this being that the later requires and uses an entity as a sacrifice to be bound and imprisoned within the weapon to become that weapons sentience. Rune weapons have runes engraved upon them that do impart an addition of power or effects that the weapon is able to achieve. However, the runes engraved on Rune weapons are never Domination runes as those are only ever engraved and used as part of the process from which a Sentient Weapon or Mourneblade is forged and created.
It is also likely from what we have discovered and seen in relation to Sentient weapons that there is clearly a relationship between the type and power of the cosmic entity used in the creation of a sentient weapon. When a mortal or lesser entities are used the see that the weapons name that is created bares no mark of the soul or essence that it traps within; for example we see the outcome when an essence is fractured and used as the source for different things with what happened to Ner’zhul in the creation of Frostmourne and the Helm of Domination. Neither of these items seem to allow for the entrapped essence to manipulate the weapons name ensuring their name and persona becomes an aspect of its name. This can likely be assumed to be the case for various other weapons such as Kingsmourne and Shadowmourne for example.
However, when an entity of significant power is used and their entire essence is entrapped within the weapon during its creation we see a different outcome in what happens in terms of the weapons name. It seems that the entrapped entity and their Sentience is able to influence the naming of such weapons to incorporate their own actual name to be that weapons name or a part of its name. Examples of this would be weapons such as ‘Xal’atath, Blade of the Black Empire’, Remornia, Gorshalach and its fractured personality to create a split that contains all that encompassed the good that existed in all beings even the noble ones; while the other comprised that side which was the darkness which exists within in all beings and even the noble ones - Taeshalach & ‘Gorribol the Dark Seether’ respectively.
While we have found out a lot more about who and what Xal’atath likely was and what they will become now they are released to a certain degree. We don’t have any real details or information on who or even what they actually could be in terms of an actual cosmic entity/being for any of the other weapons I mentioned along with Xal’atath, Blade of the Black Empire. However, if you consider the split identities that were formed when Gorshalach took the action that caused it to be fragmented and the two weapons that fracture created. It is possible that Gorshalach was likely some powerful cosmic entity which involved a connection to all beings and what construed to be said to be noble for all regardless of whether it was good/bad or light/dark. This in way potentially eludes to him having some connection or involvement with the balance/equality/Judgement of all between the Light and the Dark i.e. the Cosmic Forces Light and Void which in a way could also potentially tie him in someway to Elune maybe as well. This is just a hypothesis in terms of Gorshalach but it is something to think about and consider about who or what he was clearly used by the PRIMUS like every other entity that was used and entrapped as part of the process to make Sentient Weapons.
Just something to consider and think about how the PRIMUS might have been manipulating and pulling various strings for a very very long time a lot long that most would ever think to consider.
just my 2 cents and thinking outside the box a bit about various things we do know etc. and how that potentially links to a bigger picture involving the PRIMUS for a very long time going back much further than we were lead to believe etc.