1. Locations

Vale of the Fallen Rajah

Natural Feature

This vale is the site of the first great draconic victory in the war against the demons. It was here that the rakshasa Yad-Raghesh was slain after a violent rampage, taking an entire flight of Light of Siberys soldiers with him. The victory was short-lived, however, because over time Yad-Raghesh’s essence corrupted and weakened the land, allowing demons to escape from Khyber’s depths. Despite their vigilance, the dragons of the Light haven’t been able to stop the slow but steady spread of corruption.

Source: Eberron Campaign Guide

The fiend known as Yad-Raghesh is a mystery; some loredrake scholars question whether he was actually an overlord, or whether he was an exceptionally powerful champion of Sakinnirot or Ran Iishiv. What is known is that during the wars of the Age of Demons, Yad-Raghesh fought in the form of a colossal two-headed rakshasa; he was defeated with surprising ease, but it was later discovered he had somehow imbued his essence into the region in which he was slain, permanently corrupting it. The corpse of Yad-Raghesh remains in this vale, which seethes with hatred and fiends.

There is no evidence that the consciousness of Yad-Raghesh remains as an active force, and he plays no role in the Lords of Dust, but he has effectively transformed this Vale of the Fallen Rajah into a heart demiplane in the midst of Argonnessen.

Source: Chronicles of Eberron

Dragons of Eberron

Both sides suffered innumerable casualties in the ancient war against the rakshasa overlords. In one epic battle, a colossal two-headed tiger-fiend named YadRaghesh was laid low south of the Dragon Spine. The rajah assaulted Argonnessen on a seemingly pointless rampage, leaving a swath of destruction in his wake. It took an entire battalion of the Light to fell him. YadRaghesh was the first rajah slain in the great war, and his destruction was hailed as a grand victory. But elder Eyes of Chronepsis pondered the rajah’s suicidal attack uneasily, and their momentary surprise at his death was followed with wary concern. Their fears came home to roost centuries later when the land where Yad-Raghesh fell rotted away and a host of fiends spawned from the desolate stretch of corrupted earth. Since then, the Vale of the Fallen Rajah has been a thorn in the dragons’ side, where malignancy grows from foul roots and taints the earth and sky with evil.

At present, the Vale is lair to the Talons of Tiamat and the countless fiends huddling in their fallen rajah’s dark shadow. The Light of Siberys patrols the perimeter incessantly doing their best to curb the spread of the Vale’s seeping rot. Still the darkness encroaches, gaining inches every year. Unless powerful magic is developed to contain it, it will eventually cover the face of Argonnessen.

Approach

Desolate but natural desert suddenly gives way to a bloodsoaked landscape of dark, corrupted earth. The first obstacle to braving the Vale is the Light of Siberys. The Light allows no entry, because most who venture within return twisted and possessed by fiends. The soldiers patrolling the no-man’s-land around the Vale are under orders to annihilate any living being that crosses their path, fiend or otherwise.

The rajah’s fall shook the earth, and now a bleak wasteland riddled with dark canyons and sulfur-spewing caves lies where his blood desecrated the soil. The scarred ribs of Yad-Raghesh, twisted spires of pure evil, reach high into the black-clouded sky above.

Features

The land here seeps hate. Those who trespass within the Vale find themselves filled with rage over the slightest affront and must make a DC 25 Will save to resist the urge to attack anyone who baits, insults, or otherwise offends them, even if the offense was offered in jest. In addition, the corrupting power of Yad-Raghesh erodes the morals of any who stay among his remains. Every day spent in the Vale adjusts a creature’s alignment one step toward chaotic evil (Will DC 30 negates). Also, the canyons betray travelers, shifting to befuddle attempts to navigate them. All Survival checks attempted in the Vale take a –10 penalty.

By far the most insidious threat of the Vale, and the primary concern of the Light of Siberys, is the place’s strange power over memory. Every day, a creature that has seen the Vale must make a DC 30 Will save or forget everything it knows of the place, even the location’s very existence. This curse allows bands of fiends to wander out of the Vale uncontested as patrols of the Light simply forget their mission and find themselves faced with a sprawling, unfamiliar wasteland. Patrols are constantly rotated to avoid lapses in containment, but fiends invariably escape, and the Vale continues to encroach upon the surrounding countryside.

Keyed Locations

  1. Chronicle of the Damned: On the edge of the Vale, the Light of Siberys erected a mournful monument of standing stones as a testament to the dire threat posed by this tainted wasteland. A single scale from each dragon corrupted by the Vale (and summarily executed) is embedded in the face of one of these stones. The Chronicle began as a single standing stone, but now encompasses a henge of over fifty menhirs covered top to bottom with scales of every hue.
  2. Canyon of Entrails: These constantly writhing canyons are slick with bile and mucus and the reek of rot. Stealthy patrols of babau demons led by naztharune rakshasas (MM3 136) beset anyone who enters here. Random sinkholes of acidic bile claim many travelers as well. A DC 30 Search or Survival check allows a creature to detect these hazards. A DC 25 Reflex save is necessary to avoid an undetected pit. If a creature falls into a sinkhole, a DC 25 Climb check extricates it from the slick bile (an ally can haul it out with a DC 20 Strength check, but if the attempt fails, the ally plunges in as well). Anyone who spills into these caustic pits takes 5d6 points of acid damage in the first round and is submerged in the second round (taking 20d6 points of acid damage).
  3. Womb of Yad-Raghesh: This foul crevice, ever shrouded in supernatural darkness, is where the fallen rajah’s sinister energies pulse strongest. Here the Talons of Tiamat place eggs (their own, or those stolen from other dragons) to be tainted with Yad-Raghesh’s unholy power. Eggs hatched in this womb nearly always yield spawn of Tiamat (MM4 128) or abishai (FC2 108). On occasion these eggs receive a particularly dark blessing and spawn a half-fiend dragon. A rakshasa who grovels especially well before the Talons of Tiamat is honored in a dark rite during which it feeds upon a ripe dragon’s egg in the depths of the Womb. If its dark soul proves worthy, it is immediately transformed into a half-dragon (apply the template normally) and becomes a great emissary between the fiends and the Talons. If it proves too weak, a spawn of Tiamat tears itself out from the unlucky fiend’s gizzard.
  4. Ribs of the Rajah: Burned black, these spars of bone rise high into the dark clouds above. They twist and shift, the sound of their grinding echoing as far away as Seren on still nights. Legions of fiends crouch in the shadow of the ribs, paying homage to their fallen rajah as they train to avenge his demise. Flights of vrocks patrol the skies above, and Gargantuan bebiliths crawl the carrion floor culling weaker fiends to galvanize YadRaghesh’s demon army.
  5. Tiger’s Spine: This mile-long line of bonewhite rock is riddled with tiny caverns. The Spine is infested with thousands of imps and quasits that constantly feud for dominance. Those that prove more sinister graduate to higher fiendish forms and join the baleful legions at the Ribs. Currently a scheming imp sorcerer named Grazzdalt reigns supreme in the Spine—he giddily dreams of someday becoming a cruel bone devil enforcer.
  6. Festering Heart: At the heart of the Vale lies the Talons’ redoubt. Here gather titanic evil dragons who have turned their backs on their own kind to slavishly bow to the Lords of Dust. Schemes to bring Argonnessen down into Khyber and corrupt the mightiest Eyes of Chronepsis are hatched in this dark place. The fallen rajah’s foul spirit places dread wards against scrying here. Any creature that attempts to remote view Festering Heart must immediately make a DC 40 Will save or instantly have its alignment warped to chaotic evil.
  7. Motes of Dust: Only recently the scouts of the Light discerned these dire threats. Hovering out of sight, several strange extraplanar pockets conceal squadrons of rakshasa troops and demon support fighters. These motes are nearly undetectable demiplanar phenomena, and the Light does not even know how many exist (the ones marked on the map are the only motes known of). Worse yet, many dragons fear that, as the Vale’s dark power grows, these extradimensional motes could gain the ability to move, secreting elite units of fiends to any vulnerable strike point on Eberron.
  8. Demon Cysts: These giant craters are filled with sloshing hell-scum and the putrescent soul-stuff serving as a base for lesser demonspawn. A sea of a thousand half-formed lemures and larval dretches churns here. Bearded and chain devils tirelessly cultivate the fledgling fiends under the cruel watch of a barbed devil taskmaster named Haath-Krueg. Surgical strikes by Soldiers of the Light occasionally obliterate these cesspools of evil, but they quickly regrow.

Keith

The fiend known as Yad-Raghesh is a mystery; some loredrake scholars question whether they were actually an overlord, or whether they were an exceptionally powerful champion of Sakinnirot or Ran Iishiv. What is known is that during the wars of the Age of Demons, Yad-Raghesh fought in the form of a colossal two-headed rakshasa; that they were defeated with surprising ease; and that it was later discovered that they had somehow imbued their essence into the region in which they were slain, permanently corrupting it. The corpse of Yad-Raghesh remains in this vale, which seethes with hatred and fiends. There is no evidence that the consciousness of Yad-Raghesh remains as an active force, and they play no role in the Lords of Dust, but they have effectively transformed this “Vale of the Fallen Rajah” into a heart demiplane in the midst of Argonnessen.

Source: https://keith-baker.com/dm-overlords-2022/