Legend Lore: Obyrith

The Obyriths had been despicable lords of evil incarnate long before not just mortal life, but the deities they worshiped; but not in the reality they eventually found themselves in.
Long ago, Obyriths were the masters of a forgotten realm past the cosmos, the name of their ancient domain having been lost to time. While technically the rulers of this reality, they became prisoners of their own actions. They had destroyed their universe, draining the dimension of life and power to feed their dark hunger, and turning it into a decaying world of crumbling ruins.
A powerful Obyrith Lord hatched an idea on how they could preserve themselves. They would create a shard of ultimate evil, an object powerful enough to breach the barriers between reality. After pushing past the confines of the cosmos, the shard would serve as an entryway, a seed of evil that they could use to corrupt the most powerful entities in this realm before coming through themselves, leaving their dying world behind.
Eons passed as the waiting Obyriths slowly died out, until a power-hungry entity known as Tharizdun discovered their trap and seized the shard. The obyrith conduit quickly ruined the mentally and spiritually open being, the link between them driving him insane in an instant. The obyriths demanded he place the shard in the Astral Plane, promising him total reign over it if they served him faithfully.
Unexpectedly however, Tharizdun saw an issue with this plan even in his maddened state; the gods would quickly take issue with this and turn on him before he could fully obtain the power he was promised. Rather than that, Tharizdun fled to the far corners of the cosmos and planted the seed into a churning expanse of primal chaos, a realm of fallen primordials he hoped to make his own. Power like that realm had never witnessed before erupted from the chaos where Tharizdun plunged the shard, as the nascent evil of their home exploded as black flame through a yawning vortex.
In the Ages before Ages, the Obyrith and sub-races of the Abyss fought for dominion, ultimately losing their seat of power when the Dawn War saw their realm invaded by forces of Good; and the Tanar’ri became the new rulers of the Abyss.
Defeated and dying, relatively few obyriths remained in the Abyss's most remote recesses, and of those that did, few maintained any real influence. Those that continued to cling to existence either had the tacit approval of the Tanar'ri, the effort it would take to fight them not worth their defeat, or claimed domains too inhospitable or isolated to try conquering.
Once legion, the obyrith lords had been drastically reduced in number, only a handful surviving to modern times following the destruction of their reality and the wars that followed the birth of the Abyss. However, twelve of the few remaining obyrith lords were members of a secret alliance formed to restore obyrith dominion. Since the defeat of Obox-ob, these remaining lords, called the Queen's Conclave or Quorum of the Twelve, came to the understanding that if one of them could conquer the Abyss, the obyriths would rise as a group and regain their lost power.
Of them, only a few is known.
Areex, the Forgotten Prince. No records of Areex can be found, none can recall his nature or deeds. According to the synchronized barkings of twenty-three gibberlings, Areex made a secret pact with Bolothamogg, Him Who Watches from Beyond the Stars, and was ordered to go beyond. Bolothamogg is said to be the darkness between the stars, a guardian that ensures nothing escapes the multiverse to taint the “true reality” of the outer dimensions. The Aboleth honored it by building coliseums and other roofless buildings.
Dagon, Prince of the Darkened Depths. A primeval leviathan whose presence brought a fear of the sea and all that lurked beneath the water. Frequently confused with Dagon, formerly Jaqon, reviled and exiled Archdevil. Anyone who attempted to summon the Archdevil would instead get the more powerful demon prince of the same name.
Ix’illik, the Chrysalis Prince. A house-sized soup of everchanging limbs that ruled the Fleshforge, an undulating, protoplasmic realm of hate and hunger. The eldritch, primordial demon lord was driven primarily by the desire to reshape all living things into demonic lifeforms. He is sealed under the dunes of the Prison of the Gods.