I’m pulling a few answers from other weeks, and I’ll continue to do so as time allows so this can be a comprehensive source for all of my Q&A discussions of the Lords of Dust and the Overlords. So check back in a few days and I may have expanded it! As always, these answers are just my opinions and may contradict canon sources… though to the best of my knowledge, I’ve written most of the canon sources on the Lords of Dust!
There are a number of decent sources of information on the Lords of Dust. I recommend the Eberron Campaign Guide (4E) and Dragon 337. With that said, let me try to clarify some of the common points of confusion right away.
The Lords of Dust is an alliance of fiends—mostly rakshasa, as they are the most common native fiends of Eberron—who serve the interests of the fiendish overlords of the Age of Demons. There were originally approximately thirty of these overlords. Their power was equivalent of that of gods in most other settings. Most exerted influence over a region akin to a large modern nation, but some had more subtle influence reaching across the entire world. Overlords are part of the very fabric of reality, and they cannot be destroyed any more that you can destroy death or treachery. They can only be bound, and that only with the guidance of the Prophecy. The only known force capable of binding them is the Silver Flame, which was created by the sacrifice of the Couatl host, a sacrifice that created an immortal force of light to contain the immortal force of darkness.
The overlords of the Age of Demons are the most powerful entities that exist in the setting. An individual overlord is equivalent in power to il-Lashtavar (the force behind the Dreaming Dark) or the entire Undying Court. A question worth asking is, if they are so incredibly powerful and had hordes of demons on top of it, how did the war of the Age of Demons last so long? It lasted for centuries… why didn’t the overlords just win?
There’s a few answers. The first is that it wasn’t a “war” in the sense we think of it. Some of the overlords—like Rak Tulkhesh and Katashka—fielded armies that could be fought in a traditional battle. Some sought to directly control and enslave dragons, titans, and other creatures. But with many of them, the “war” was simply existence. They are immortal. Their fiendish servants are immortal. They don’t NEED to conquer you. They just do what they do. A battle against Tul Oreshka is a battle against madness; having more soldiers doesn’t help you win a fight. The Voice in the Darkness “wins” when you succumb to madness; she doesn’t need to occupy your city if she occupies your mind.
Got that? Now add to this the fact that for the most part, the overlords were neither friends nor allies. They are not human in any sense of the word: they are primal entities who shape reality by virtue of existing. Far from being friends, many of them actually fought one another; when you are an incarnation of strife or discord, that’s kind of what you do. One of the main reasons they were finally defeated is because their opponents were able to target them individually or use their existing rivalries against them. And bear in mind that absolute immortality and nigh-omnipotence breeds a lot of overconfidence.
After they were bound, their surviving servants eventually recovered and began laying plans to free their masters. Eventually this brought them in conflict with one another. The Lords of Dust aren’t a monolithic force; they are more like the United Nations, with each member of the Council of Ashtakala representing the interests of a different overlord. They don’t all share resources, and three different Lords of Dust may all have personal agents in the same court. The purpose of the Council is at best to exchange favors and at worst to try to keep the Lords from interfering with one another’s plans accidentally (key word: accidentally. Intentional interference happens). The Wyrmbreaker calls the council together and explains that he’s going to be doing something that involves a group of heroes and will probably kill the Queen of Aundair. The Shadowsword explains that he has plans involving Aurala, but based on his insights into the Prophecy, perhaps Durastoran could achieve the same results with the death of Kaius III—and he’d be happy to lend some agents to that cause. Perhaps the Wyrmbreaker agrees, perhaps he doesn’t, perhaps he agrees but still plans to see to it that Aurala dies.
The next thing is to understand what it takes to release an overlord. It’s nothing so simple as breaking a seal or melting a ring. The conditions for the release of an overlord are different for each one, and involve a long-term manipulation of the Prophecy. In the case of the Aurala death above, we’re not just talking about Aurala’s death; it would be trivial for one of the Lords of Dust to make that happen. Instead, it’s that a particular hero (the son of a particular person, herself the daughter of a particular person, born in particular circumstances) must kill a beloved ruler on a particular day with a particular weapon, and must do so believing they are serving a greater good but in fact be wrong. So the Lord of Dust not only can’t kill the ruler, they actually have to make sure that the person who does the killing doesn’t know why they are doing it. Some of the overlords’ release conditions have nothing to do with one another; others are actually overlapping or contradictory, so actions cannot be taken to free one without directly screwing with another. This can result in Lords of Dust helping heroes. The problem is, if a Lord of Dust is helping you, you can be certain it’s somehow benefiting them.
If an Overlord is released, it generally won’t return at full power. It will take time for its power to grow. Bel Shalor was released, and wreaked havoc in Thrane for almost a year before he was finally bound again by the sacrifice of Tira Miron. It wasn’t the end of the world; it was simply a year of utter terror for the people of Thrane. Of course it’s possible that Bel Shalor intended this all along as a way of infecting the Silver Flame, and thus his release wasn’t as devastating as it could be. But generally, the immediate release of an Overlord will affect an area of a few miles, spreading out until it encompasses a nation or more. The impact will also greatly depend on WHICH Overlord is released. An incarnation of madness or war will cause immediate violence or insanity. An elemental force like Dral Khatuur would cause a new ice age. But an incarnation of tyranny or betrayal may have a very subtle effect that takes years to really be noticed. It’s entirely possible that the Mourning was caused by the release of an Overlord, and that there are continuing effects that people simply haven’t identified. Essentially, the effect of an Overlord’s release is up to the DM. It could have instantly apocalyptic effects, or it could be a slow cancer that eats away at the region over time.
Tied to this, I once had a PC warlock in my campaign who was actually a willing agent of an overlord. The idea behind his character was that it was inevitable that an overlord would eventually be released… but his overlord would at least keep society intact in a form that people could live in, as opposed to dissolving it into chaos, war, or ice. Life in the domain of his overlord might be endless tyranny and oppression and tears of blood, but it’s far better than what you’d get from Tul Oreshka or Rak Tulkhesh. He didn’t LIKE the future he believed was coming, but he believed that ONE of them had to get out eventually, and his was the best option.
So bearing all that in mind…
Is there a list of all the rajahs already published somewhere? With the rajahs theme, location and where to find the full writeup?
I’ve never done it. However, Lord Gore at the WotC forums put together this list, which may be the most comprehensive around; I’ve updated it with Overlords mentioned since it was written.
- Bel Shalor, the Shadow in the Flame (Tamor Hills, Khorvaire) ECG page 29
- Dral Khatuur, the Heart of Winter (Frostfell) female overlord Druid 25/Sorcerer 15/Frost MageFb 10 Death, ColdFb, WinterFb unpublished
- Eldrantulku the Oathbreaker (unknown) NE male overlord rogue 15/sorcerer 15/mindbenderCAr 10 CorruptionBoVD, Trickery Dragon 337 pages 63, 69-70
- Katashka the Gatekeeper (Lair of the Keeper, Khorvaire) LE male overlord cleric 8/wizard 8/true necromancerLM 14 Deathbound, UndeathECS DoE page 36, Dragon 337 page 70, ECG page 30
- Rak Tulkhesh, the Rage of War (Khorvaire) NE male overlord fighter 15/blackguard 10/cleric 15 Destruction, War; Dragon 337 pages 65, 70; ECG page 31
- Ran Iishiv the Unmaker (Korrandar, Sarlona) SoS page 12
- Sakinnirot the Scar that Abides (Stormreach, Xen’drik) CoS page 156
- Shudra the Fleshrender (Mel-Aqat, Xen’drik) PGtE page 155, TFoW page 127
- Sul Khatesh the Keeper of Secrets (Arcanix, Khorvaire) LE female overlord wizard 36/archmage 4 Knowledge, Magic CoS 89, Dragon 337 pages 60, 68; ECG pg 31
- Tiamat, the Daughter of Khyber (Pit of Five Sorrows, Argonnessen) DoE page 9
- Tul Oreshka, the Truth in the Darkness (unknown) CE female overlord bard 20/wizard 10/loremaster 10 Madness, ShadowECS Dragon 337 pages 64, 70
- Masvirik the Cold Sun (Haka’Torvhak, Q’Barra); Dungeon 185 (DDI)
- Unnamed (Krertok Peninsula, Sarlona) SoS page 12
- Unnamed (Sustrai Mor, Sarlona) SoS page 91
- Unnamed (Tempest’s Isle, Lhazaar Principalities) PGtE page 99 possibly a rajah
- Yad-Raghesh (The Vale of the Fallen Rajah, Argonnessen) colossal two-headed overlord DoE page 50 “dead”
- The Spinner of Shadows (Xen’drik), DDO
I believe that Sul Khatesh is the only one that’s received a complete 3.5 writeup, in Dragon 337. I’ll also note that I prefer the term overlord to rajah. “Rajah” tends to get subsumed into “rakshasa rajah”—and while the overlords rule the rakshasa, they are not themselves rakshasa.
For you, how many overlords do exist? There is 17 listed, that’s all? There is a couple more? 17 more? A hundred more?
According to the Eberron Campaign Guide (page 30), “approximately thirty fiendish overlords are bound in Khyber.”
How big is the area of influence of an overlord?
Thirty overlords once held dominion over all of Eberron. A fully empowered overlord can easily hold dominion over an entire nation. However, it will take time for a released overlord to regain its full power. Its immediate dominion would cover a few miles, and would then quickly grow until it covered an entire nation or more.
If Katashka is made free, how long until the effects(pests, deaths, undead hordes) are sensed in the Talenta Plains? And Q’barra? Or Xen’drik/Sarlona?
That’s entirely up to you. You could decide that Katashka’s influence spreads quickly and that within days wights are crawling out of cemeteries across the world. Or you could decide that his power is growing slowly and won’t expand exponentially until Mabar’s next coterminous phase.
What if more than one overlord is released. Would they ally or make war on one another?
It entirely depends on what overlords they are. The Voice in the Darkness doesn’t do alliances. The Oathbreaker will, but there’s no question that any alliance with him will end in betrayal. And in some cases there’s no real basis for alliance—Rak Tulkhesh wants endless war, while Dral Khatuur simply wants to freeze everything in her reach. Some might fight, but such a feud might be even worse for mortals in the disputed territory than an alliance.
Are the overlords friendly to each other enough to releasing some or all of the other still bound ones? If Bel Shalor breaks his bonds, he will stride to Aundair and try to release Sul Khatesh, or he will just make sure she never gets free?
First, Bel Shalor can’t stride to Aundair and release Sul Khatesh. For Sul Khatesh to be released, the conditions of her Prophecy must be met. It doesn’t matter how much raw power Bel Shalor brings to bear; releasing an overlord is delicate work. Now, would he TRY to? Possibly. Bel Shalor in particular is a devious force, and has clearly learned a thing or two from his imprisonment. He might well see the value in releasing as many of the other overlords as possible, where Tul Oreshka just wouldn’t bother. On the other hand, there are certainly rivalries and some overlords might work against one another. It’s been noted that Dral Khatuur has no love for any of the others, and as a result she doesn’t have representatives on the Council of Ashtakala.
How common is the knowledge about how their prison works or where each of of then is between the overlords? Does every overlord know how to break free? Or how to break other free?
Extremely uncommon, no, and no. The secrets are all held in the Prophecy. It likely took thousands of years of study before any rakshasa figured out the secrets of releasing their master, and there may well be ones whose release conditions have never been identified. One thing to bear in mind is that the Prophecy is a living thing that constantly shifts as the future becomes the present. So Rak Tulkhesh can be released if X, Y, and Z happen. If you remove Z from the equation—by destroying the person who was supposed to have a child or the sword that child was supposed to use—the universe will simply recalculate and find a new way to solve for Z; and all the scholars who knew the original answer will have to keep studying until they figure it out. This is what the Chamber does: seek to identify paths that will release Overlords and eliminate them, while the Lords of Dust find paths that will release them. It’s a never ending conflict, even though it rarely comes to a demon and a dragon fighting one another.
What should the response of the Argonessen dragons be if an overlord is released?
Rebinding an overlord is just as difficult as releasing one, and in the same way, brute force is no answer. Bel Shalor wreaked havoc for a year in Thrane before Tira defeated him. Do you think Argonnessen just didn’t know or care? They knew; they simply had no path to rebind him, so they stayed far away. They may well have helped Tira without her knowing it. Just as it doesn’t help Sul Khatesh to have a rakshasa kill Queen Aurala, it doesn’t help Argonnessen if an army of dragons defeats Bel Shalor; he’d just reform tomorrow. So Argonnessen would get to work trying to find an answer to the problem, and trying to isolate themselves from the impact of the release. But brute force—even all the magic of Argonnessen—is no answer to the release of an overlord.
Of course it’s possible they would take action to contain the impact of a release. If the Rage of War gets out and transformed the Five Nations into a raving army of bloodthirty reavers, the dragons might sink their boats before they can reach Argonnessen. But this won’t stop Rak Tulkhesh.
And what about Aerenal? Are they safe against one overlord? Two? How long could take to the free overlord to crack the island defenses?
The Undying Court is essentially an artificial overlord. As such, it would be able to stave off the hostile influence of another overlord for a time, but as noted above, it would also depend on the form that influence takes. Tul Oreshka drives mortals mad. Rak Tulkhesh drives them to war. Aerenal could keep Rak Tulkhesh from infecting the elves, but they can’t stop him from flinging hordes of reavers at the island. And if you had an alliance of overlords, who knows?
Realizing that the bonds of the Daelkyr have to be maintained, and with the chaos brought by one or more released overlords, is safe to assume that sooner or later they would falter, and the mad gods would spill in Eberron again. How could they interact with the acting overlord(s)?
Daelkyr are small potatoes next to overlords. Bear in mind that the daelkyr aren’t even the toughest things in Xoriat; they’re just the toughest things that have any interest in other planes. Beyond that it depends on the overlord in question. The Voice in the Darkness might welcome the daelkyr. Rak Tulkhesh doesn’t care who’s fighting as long as someone is. An overlord who actually wants to exert dominion over mortals and have some semblance of civilization—an incarnation of Tyranny, for example—would need to deal with the daelkyr to keep them from wrecking that. But many overlords might just incorporate the daelkyr into their plans.
And Sarlona? What would be the Dreaming Dark response to an age of demons again?
Pretty much any free Overlord will mess things up for the Dreaming Dark. However, the Dreaming Dark has never been noted as having expert knowledge of the Prophecy, which means a) they don’t have lots of warning about it and b) they don’t really know what to do to deal with it. And remember, fiends don’t dream. Again, the Dreaming Dark was active when Bel Shalor spent a year free in Thrane. Most likely they would keep their distance while studying the situation and trying not to panic about it. They might provide aid to whoever proves to have a chance to bind it. But a Riedran army won’t help. Thought they may not know that—so if you WANT them to, you could have them panic and do something dramatic, simply so it can fail awesomely. Heck, a confrontation between the Dreaming Dark and an overlord might be just what it takes to push Dal Quor into the next age… which could be the best thing that could possibly happen, if the next age of Dal Quor is one of light.
If a Lord of Dust was killed, would the death be for good (akin to killing a demon in the Abyss) or would it reform somewhere?
In Eberron, immortal spirits cannot be destroyed. Unless they are bound, they will always reform. This is true of every immortal from rakshasa to devils to quori. Depending on the type of immortal, it may not retain its memories after death and reincarnation. This is true of quori, and it’s why the Dreaming Dark seeks to exterminate the Kalashtar quori – so they can be reintegrated and reborn as part of il-Lashtavar. With rakshasa, weaker ones generally lose memories, while strong ones (such as the Council of Ashtakala) will generally reform with memories intact. Now, there are ways to ensure that you destroy the memories, and ways to delay that reincarnation, and the key there is to know your Prophecy. Kill the Wyrmbreaker with normal steel on a Tuesday and he’ll be back by Thursday. But if the Son of Seven Sorrows kills him with a silver sword forged in the tears of the Keeper under the light of a new moon, he might be dead for a year and a day. Which is to say, a DM should always feel free to come up with interesting circumstances under which it is possible to effectively kill a fiend.
Are there angelic or good aligned counterparts to the overlords?
If you mean “Is there an incarnate force that’s called something like ‘The Cuteness of Kittens’?” No, there isn’t. If you mean “Is there any sort of native celestials on Eberron,” there WERE: the couatl. They were never as powerful as the Overlords, and were more on par with the rakshasa… and they sacrificed themselves to create the Silver Flame. On some level you could say that the Silver Flame is the good counterpart to the Overlords, which is why it can bind them; it’s simply less concrete and more abstract.
Why is this? Look to the progenitor myth. Khyber killed Siberys and was in turn imprisoned by Eberron. The Overlords are Khyber’s children, and like Khyber, are forces of evil that cannot be vanquished, only bound. Eberron doesn’t produce incarnate spirits like the Overlords: her children are mortal. So Eberron DID create a thing that embodies the cuteness of kittens: she created kittens. Meanwhile, Siberys would be the source of native celestials, and he did create some, like the couatl – but they were created from the blood of Siberys after his defeat, and thus lack the power of the victorious Khyber.
From a purely practical worldbuilding standpoint, there’s a simple reason for this. Eberron is designed to be a world that needs heroes. All the powerful forces of good are limited. Jaela Daran is a child whose power is limited beyond Flamekeep. Oalian doesn’t leave the Greenheart. When evil rises, the world needs you; there is no ultimate good force that can step in and solve the problem for you. The Silver Flame can empower you to solve the problem, but it can’t solve the problem for you.
Is there not even a single surviving Couatl?
I believe we have a few places in canon where there are still couatl who were left behind to watch over things. And there are of course the Shulassakar, the feathered yuan-ti. Beyond this, the fact that the couatl are gone from the word doesn’t mean that they can’t play a role–it means that they need your help to do it. Tira Miron was aided by a couatl, but it didn’t help her in corporeal form; it empowered her and advised her spiritually. In D&D 3.5 this is called divine channeling; I don’t know if 4E ever did a version of it. Essentially, it’s a form of possession that doesn’t actually control the person being possessed, instead granting them additional powers. The premise is that this isn’t something just anyone can do; Tira’s faith and courage made it possible, and it’s what defines her as the Voice of the Silver Flame — her ability to hear the Flame when others did not. So the couatl CAN affect the world, but only through the medium of heroes. Which comes back to that basic premise of Eberron: there are no forces of good that can solve the problem alone. They need you.
On the other hand, the Silver Flame preaches that it will one day cleanse the world from all evil, and naturally that involves the lords of dust, which entails that they are not truly invincible.
This idea comes from Faiths of Eberron. I didn’t work on that book, and I don’t agree with the idea. To me, the key of the Silver Flame is that you don’t fight because you think the battle can be won: you fight because it is that battle which makes the world a better place. There’s no end condition: it is an eternal struggle. There will always be a need for champions. There will always be a need for courage and sacrifice. Evil can’t be permanently vanquished, because good and evil are choices people make. You can’t eliminate lying from the world, because every time someone speaks they have the choice to lie. You can teach that person the value of honesty. You can encourage them to tell the truth. But if you truly eliminated their capacity to lie, you have taken away their free will, and how is that a good thing? This is the lesson of the Overlords. They will always be there, just as the potential for war, death, and treachery will always be there. Through our actions, we hold them at bay, both physically and in the human heart. Through courage and virtue, we show people the proper path and inspire them to be better than they are, to ignore the tempting whispers of evil. And when a noble soul dies their spirit joins the Flame, where it continues to hold evil at bay and strengthen those who fight it.
In several tales heroes tend to be inspired by higher noble powers and realize that they are still fragile and prone to temptation (this is well reflected by Eberron’s handle of alignments), and just as the lords of dust embody several aspects of evil (war…), there ought to be embodiments of goodness.
The Silver Flame is a positive source of spiritual power. It is a source of inspiration. But unlike the Overlords, it cannot act alone: it needs to act through champions. Again, this is part of what defines it as good; it cannot enforce its nature on others, but rather they must choose it. Rak Tulkhesh makes people fight. Katashka revels in death. There is no entity that forces you to be good; there are simply powers that can strengthen you if you choose to be good, just as it was Tira’s courage and virtue that allowed the couatl to empower her.
In my eyes, the fact that virtuous behavior is a choice is what makes it truly virtuous. If it is enforced–whether by a supernatural agency or a mortal power–it loses its meaning. The followers of the Silver Flame don’t do what they do because they expect to win and utterly eliminate all evil forever; they follow the precepts of the Flame because doing so is what makes the world a better place.
This is in marked contrast to the Blood of Vol, many of whose followers believe that they can some day eliminate the concept of death from the world; one can well ask what that would actually mean, and if in so doing they would also eliminate new birth. But that’s another topic. Meanwhile, you might want to consider the following…
Could the place of an Overlord be usurped, or could a person rise to become an overlord? For example, if Erandis Vol decided that her destiny was to achieve actual dominion over death, could she rise to become the embodiment of the concept of death, or failing that, usurp the place of Katashka as the gatekeeper of death?
Anything is possible. We have said that there are members of the Lords of Dust who don’t want to free their Overlord masters, but rather to usurp their power. If it’s possible for a rakshasa to do it, than it’s presumably possible for a human to do it; you’ve just got an interim step of becoming an entity of incarnate spirit like a rakshasa. With that said, you don’t have to usurp the power of an Overlord to become an embodiment of a concept. Erandis Vol wishes to become the Queen of Death (and bear in mind, she’s been working at it for thousands of years and has a unique spiritual basis for being able to do it–the Mark of Death–so clearly this isn’t a casual thing). However, I don’t think this requires her to displace Katashka. The Overlords embody horrible things. That doesn’t mean they govern them. Katashka embodies our fears of death and the horror of the undead. He can enslave the spirits of the dead and bind them to his service in the mortal world. But as he is part of this world, he doesn’t govern the fate of the dead in the worlds beyond. Rak Tulkhesh gains strength from strife, and when free he can create strife. But again, he only has dominion over the rage of war… he has nothing to do with a just conflict.
So the question you have to ask, is do you want to become an Overlord… a finite entity who can be bound and whose dominion is limited… or do you want to become a Sovereign, whose power is unbound and touches all it inspires? The Sovereign Host maintains that Dol Dorn and Dol Arrah can be found any time a blade is drawn, and that Onatar is there in every forge. Tied to the previous answer, the Sovereigns don’t take incarnate form; they inspire and act through mortal vessels. When you create something new, Onatar (or the Traveler) is with you. When you fight, Dol Dorn is with you. And, of course, when you choose to do evil in war, the Mockery is with you. But even the Mockery isn’t finite in the way an Overlord is.
People have sought to become Sovereigns before. The founder of the Library of Korranberg sought to displace Aureon as lord of knowledge. According to the draconic faith of Thir (as discussed in Dragons of Eberron), this is possible; when a new being takes on the mantle of a Sovereign, the previous one ascends to greater realms. Myths suggest that the first Sovereigns were ascended dragons who fought the Overlords in the first age. So there’s mythical precedent for it; it’s just a question of what it takes, and what it actually means if you succeed, since Sovereigns don’t manifest after ascension.
Is there any connection between Katashka the Gatekeeper and other prominent undead-themed entities (eg Vol and her followers).
Not according to canon. However, you could always decide that Katashka is connected to all negatively empowered undead, whether they know it or not… and that Vol, Kaius, and other influential undead are all secretly pawns in the Overlord’s plans. This certainly seems like a fine approach for starting with the Emerald Claw as a heroic tier threat, moving to Vol herself in paragon, and then bringing Katashka in as the true epic threat. For those wanting to know a little more about Katashka, check out Dragon 337 or this Eberron Expanded article.
Any idea what Overlord you would place under Sharn? Some of the details of Fallen (the improvement of which was a major goal of a paladin in one of my games) seems to imply something malign is buried below the city.
By canon, the spiritual force of evil in Sharn isn’t tied to an Overlord; it’s tied to the fact that it’s a dumping ground for Syrania where fallen angels… AKA Radiant Idols… are left to rot. My novel The Son of Khyber specifically addresses the idea of a malign spiritual force tied to Fallen. With that said, you could decide that the reason Sharn is such a great place for dumping angels – aside from being a manifest zone – is due to the presence of an Overlord.
Why could Siberys be killed, but Khyber only imprisoned? Or could Khyber be killed by (only) Eberron or an alive Siberys?
Assuming you take the myth at face value, there’s a few reasons. First, Khyber employed treachery, taking Siberys by surprise. Second, because that is what Khyber is: destruction. Treachery. Corruption. Evil. Eberron, on the other hand, is Life. Destruction isn’t in her nature. So she deals with Khyber by imprisoning him through creation–by building the world around Khyber, creating a living prison to hold her sibling at bay. One point I’ll make is that despite the power of Khyber’s children, their number is limited. They may never die, but if there are thirty overlords today, there will never be thirty-one tomorrow. Eberron’s children may be mortal, but they have the power of creation, and that’s something Khyber lacks. So again, Eberron didn’t create an immortal, stagnant overlord called the Cuteness of Kittens; she created kittens, and new kittens are born every day.
Of course, the progenitors and the myth are symbols as much as anything else. The triumph of Khyber explains why evil can exist in the world. Destruction cannot defeat creation, which is why Khyber can never escape Eberron; however, it can corrupt creation, as made manifest in the Age of Demons. The defeat of the demons shows that mortal life can choose a better path – that virtue can hold evil at bay – but as noted above, it can never be defeated eternally.
Meanwhile, it’s worth noting that the Ring of Siberys is the primary source of arcane energy; as such, even in death Siberys gives people the tools to change the world. They must decide whether to use them wisely.
Do you consider the DDO semi-released Overlord, The Spinner of Shadows, a good example of the demonstration of Overlord power? For non-DDO players, she is imprisoned by the Silver Flame magic, and is basically invulnerable, have some powerful poison that infects you on contact, and can summon an infinite number of demons and spiders to do her bidding. The objective of the quest is recovering parts of the Silver Flame magic that was “eaten” by some magically-altered spiders specifically to counter it, and redo the wards. If you lure her too close to the flame wards, she is weakened enough to run in fear for a few seconds.
There’s no such thing as a reasonable display of overlord power. You say yourself that she’s “semi-released.” So anything could be a reasonable display of power based on the conditions of that release. Rak Tulkhesh could turn an entire country into sociopathic killers. But if he’s “semi-released”, maybe he can only do that to things he can touch through an avatar. In other words, sure, I think this is a perfectly reasonable way to use an overlord in a form that it can be tangibly interacted with in an MMORPG. And I really appreciate DDO’s efforts to work with the existing mythology of the overlords when they could just call the Spinner Lolth and do anything they wanted. But it’s not like you need to use this as a guideline for the release of a different overlord, because it really can take whatever form fits your story.