Sibriex

Sibriexes were extremely ancient obyrith demons that were capable of manipulating flesh by grafting Abyssal matter into it. They'd existed since long before the tanar'ri came to rule the Abyss and were believed to be as old as the plane itself.

Description
Sibriexes were bloated, tall demons that were little more than, deformed heads. The reek of rotten vegetation hung off their misshapen bodies and they constantly exuded streams of blood and bile, polluting the ground wherever they went. Their faces were the size of wagons, with shriveled arms ending in trembling digits where their ears would be. In place of a neck, the underbelly of a sibriex hosted a writhing mass of stalks, puckers, and feeding tubes. Although they could lazily float through the air, a body harness of steel chains ending in sharpened spikes was tied around their bodies which tethered them to the ground and which they could animate in order to "walk" along solid surfaces.

Personality
"No creature emobodies the chaotic nature of the Abyss so well as the sibriex. Although the realm of the demons is already a place filled with infinite horrors, sibriexes for some reason make even more of these monstrosities."

- Mordenkainen

While the true inner workings of the sibriex mind were unknown even to demonologists, it was apparent that they took personal satisfaction in dominating, modifying, and destroying all other lifeforms. Intelligent and perverse, they enjoyed bullying and tormenting weak creatures, but tended to avoid anyone stronger or smarter than themselves. They were primarily concerned with the increase of their own power and over the eons had accrued a vast amount of information from across the multiverse that they greedily hoarded for future use.

Sibriexes viewed flesh grafting as its own kind of art form, and their newfound demonkin were regarded as mere raw material for experimentation. Extremely vain and arrogant creatures, sibriexes made high demands from anyone who hired them for their services, in the form goods or services in return. Such payments could be made with gold, works of art, magic items, large contingents of guards and other comforts with which to decorate their lairs.

Combat
Any creature that came near a sibriex could feel the effects of its reality-warping madness. Those who dared approach it could be poisoned by its aura of corruption. Moreover, they risked being driven insane by its mind-warping influence, starting to view the sibriex as the perfect life form.

A sibriex could almost instantly warp a number of creatures around it. In less than a minute, it could turn those that could not resist its effect into deformed monstrosities known as abyssal wretches. This transformation could only be undone by a wish spell.

When in combat, sibriexes tended to use their acidic excretions of bile to reach opponents at a distance, as well as their animated chains to attack enemies that came nearby. They could innately cause the effects of the charm person, command, dispel magic, hold monster, and feeblemind spells.

Society
Sibriexes had no room for equals among their associates, instead surrounding themselves with lowly thralls or under the orders of a greater power. The sibriexes' ability to graft flesh out of the chaotic matter of the Abyss was highly valued by demon lords and certain spellcasters, making them most likely to be found within their lairs. If under the thumb of a master, they always sought out viable opportunities to betray them, becoming more domineering and wicked while being oppressed. This process usually only took a few weeks if the sibriex wasn't stopped, as they eventually took control of their environment and used their innate charm monster and feeblemind abilities to convert their supposed masters into puppets at their command. Some sibriexes were sought out and employed by demon lords not to craft flesh but as advisors and orcales due to their incredible knowledge, although such sibriexes still manipulated their employers for their own ends.

As a rule, sibriexes preferred to avoid politics and tended to keep themselves apart from major conflicts, living in large isolated fortresses or unclaimed areas of the Abyss. Such lairs were guarded by armies of lesser demons and charmed monsters allowing a sibriex to focus on strengthening their position.

Ecology
Sibriexes were thought to have originally been spawned from ancient clans of obyriths specializing in flesh crafting, enslavement, and academic pursuits. It was believed that the obyriths had lost the means for sibriexes to reproduce and because of that their numbers never increased. Their exact numbers were unknown, but it was estimated that there were only a few hundred sibriexes in existence, usually no more than one per each layer of the Abyss.

History
The origin of sibriexes was largely unknown, but some sages claimed that they had come from an alien universe at the time of the creation of the Abyss. According to the World Axis cosmology, this event coincided with the insertion of the shard of evil into the Elemental Chaos by Tharizdun.

During the war waged by the obyriths against law, the precursor to the Blood War known as the Upheaval, sibriexes were tasked with breeding and augmenting the obyrith armies with their implants. After generations of experiments, sibriexes played a major role in the creation of the various tanar'ri races that initially fought for their obyrith masters. Their craft could most easily be seen in some of the characteristics of tanar'ri anatomy that looked artificial. After the obyriths' defeat at the hands of the tanar'ri, sibriexes used their cunning to swiftly switch sides and started working for the demon lords in the same way they served their former masters. Whether or not their was any kind of underlying scheme behind the augmentation of the race that overthrew their former masters was unknown.

Notable Sibriexes
Five brilliant sibriexes inhabited the Scabwash Sentinels, a laboratory located in the ocean portion of Gaping Maw, the 88 layer of the Abyss. The sea around the laboratory was constantly polluted with refuse and crowded by their failed experiments.

Appearances

 * Adventures
 * Baldur's Gate: Descent into Avernus