The Oneironauts, more properly known as The Humble Servants and Seekers of that One True and Right Divine Dream, are a militaristic theocratic society of former Obelisk Dreamer servitors. They believe it is their duty to find their masters in one of the dream ways, that network of pocket universes they created long ago. While the Oneironauts search they also consolidate their power with scavenged Dreamer technology. By skill and force they are carving out an empire in the here and now, building a throne worthy of their masters' return.
Sometimes causally called alternate dimensions, the dreamways are more accurately thought of as pocket universes. The technology to create them was discovered by the obelisk Dreamers and maladroitly copied by the other Bastards. A classic Dreamer pocket universe is created and maintained by a keystone obelisk in this universe. These intricate devices use psionic circuits to "dream" the plane into existence. Pocket universes have their own laws of physics and their own internal logic. Beings from the external universe can visit these realms by translating their existence into a form appropriate for the new universe.*
The Prime strain are the dominant "race" among the oneironauts, due to the fact they control the cloning machinery necessary to make themselves and their allies. They are roughly humanoid, with tentacles instead of legs and satellite dish shaped heads. They have no facial features but they have three toothless mouth orifices on their torso. Calling them a race is inaccurate because they are all genetically identical. This is a major weakness which they offset through custom engineered symbiotes. They have artificial immune systems that vary from individual to individual. They have feeder pets that live in their mouths that integrate into their G.I. tracks. They also have some symbiotes that serve no purpose other than as living jewelry.
Ursaiods are the warrior servitors that make up most of the Oneironaut military. They have stocky quadruped frames with a pair of manipulator tentacles on their backs. Their culture emphasizes their genotypes over their individual identities. Every Ursasiod is a clone, but unlike the Prime Strain there are roughly a million Ursaiod genomes. An Ursaiod warrior fights to bring glory to their genome, fighting to add to the legacy of their genes. Every devote Urasiod can recite all of their "ancestors" and their accomplishments.
The Goobiods are a race of single celled organisms that form into intelligent colonies that piliot humaniod mechanical suits. Their intelligence is a property of the structure of the colony, but they store elements such as memory and personality in holographic form within each cell. This means the structure of their brain can be altered, augmented or even destroyed without harming their core identity. This has allowed recreational brain surgery to become the goobiods chief hobby. All brain mods must be approved by the Oneironaut inquisition to prevent the emergence of Runaway Bio-singularity syndrome, which may or may not be a real thing. There is a thriving counter culture of black market brain modders that only occasionally turn into crazed esoterrorists.
The Hateful Fluid is a dreamway dominated by an ocean of cloudy yellow bile that has flooded a black and foreboding city. In the past the city was kept free of the strange liquid by emotional bilge machines. Today, only a single machine is still active, protecting an Oneironaut enclave known officially as the Shrine of Odium**.Bilge city exists as a base camp for scavenging expeditions into the black city. At the height of the Dreamer empire this place was a forge for exotic weapons, and many are still in the ruins. The Hateful Fluid is caustic and near boiling, requiring special suits to survive. Once immersed in the fluid, explorers feel in odd sensation, as though they are an itch on someone else's skin. The biggest danger are the seethes , liquid creatures native to the plane. When they slip into the city they take ever changing phantasmagoric forms. In their home they are only visible as slight murky currents. They are so hot they can even melt almost anything, and they seem to only live to kill. Apart from them, the only native lifeforms are strange, dead-eyed crustaceans.
The Dreamway known as C R A W L has several folk Etymology about its name. Some say its named for the primary mode of locomotion among its natives. Others say it’s the feeling you get on your skin when you're there. The final theory is that it is because the whole plane seems to be trying to crawl inside itself. The living firmament of this plane is infested with parasites, which are in turn infested with parasites, and so on past the level of observation***. This odd plane is home to a vital Oneironaut research station. By studying the extreme biophilic laws of physics here they gain insight into bioengineering in the normal universe. This is where many of the Prime Strain symbiotes are developed.
The Thought Skien, like Woundspace is a true alternate dimension, an artificial segment of space/time grafted onto the regular universe. Every thinking being makes its mark here, their ideas and emotions taking the form of light energy. An inhabited planet is a storm of light and color, a boiling maelstrom of thought. From these points of light the mental energy diffuses into the void, forming wispy currents of thought.
The Obelisk Dreamers could build in this strange realm; forming constructs of hard thought energy. The Oneironauts lack this technology but they can repurpose existing constructs to make new structures. The Crown jewel of their building project is the Large Notion Collector. This coral-like fan shaped installation is designed to shift ideas out of the currents of mental energy that drift through interstellar space.
Grako 86 is the champion of the Shrine of Odium, a position earned for him by his grand sire Grako 80 who found the lightless knife in the black city. Theoretically as champion he is the ruler of Bilge City, but really he spends most of his lifting weights****. The real power in the city are the Prime Strain Clerics in charge of the shrine itself. He will swear a favor to anyone who donates a relic to the city, but he's pretty useless.
Master STSLVN is the most renowned bio jeweler in C R A W L. this means they are the Prime Strain that is the best at getting symbiotic infections in C R A W L's living wilds. Their secret is that they know where the viral loci are, hidden nodes of parasitic intelligence in the organic chaos. Here, the guiding minds of C R A W L can be bargained with. They are getting old, and wish to pass on this knowledge. The problem is that they are wildly contemptuous of their contemporaries, so they are seeking outsiders to become their apprentices.
Once the Large Notion Collector gathers data, it needs to process it. That task falls to UAOAE, a Goobiod that has been modified into a supercomputer. UAOAE can process all the information streams coming from the device and distill it into useful inventions and philosophical musings. She is has received some of the most advanced modifications ever approved by the Oneironauts, and is under constant supervision by the Inquisition. Publicly, she has stated she has no desire to undergo a bio singularity event, as that would interfere with her mission. Privately, she has been covertly merging the minds of her watchers with each other, with the ultimate goal of unify all minds in the galaxy under her supreme ego. Someone should probably stop her.
*Don't worry, most forms of interplanar travel do this automatically. Well, you do have to worry about the few devices that don't.
**The inhabitants call it Bilge city
*** Mater here seems to made of particles that have been dubbed animolecules that appear to be alive, some of which appear to be diseased
**** All Ursaiods are heavily built. Grako's training has made him truly monstrous looking.