Phykommatons are a species similar and related to Endbeings, but with a different set of forms. They are genetically predisposed to be more outgoing and kind than Endbeings, but this isn't a constant (there are very mean-spirited Phykommatons and very friendly Endbeings). They inhabit geometries in The Stack that are the self-products of hyperbolic spaces, such as H2xH2, H3xH3, H4xH4, etc. There is also a more primitive and less intelligent variety existing in the 3D geometry of H2xE1.

Common features

Phykommatons, like Endbeings, look completely different to one another. This is due to them possessing immense sensitivity to radiation, and the ability to spontaneously produce radiation. Upon being even slightly irradiated, their body will be completely and irreversibly reconfigured. A specific, temporary configuration is called a "form". Forms can in theory be anything, but like Endbeings, they almost always fall into a few archetypes, but they aren't named in human languages, so this article will give their names in an evolved form of the Quatrammotile language.

Qamqpegac look somewhat similar to the monster Campe from Greek myths, though they were injected into the myths of the simulated 3D human universe, not the other way around, and most of the monstrous lore was invented by humans. They feature an upper body with a torso, a varying number and arrangement of arms, and a head. The head usually has a lot of appendages where the hair would normally be; these may resemble snakes but don't have to, though they are usually always in motion no matter what. Their lower body is much larger and is typically either centaur-like, with more legs than arms on the upper body, or aquatic, with fish-like scales and a simple arrangement of one or more tails. In both cases there will be an additional scorpion-like tail. Large wings also protrude from the waist (these can be angelic, insectlike, dragonlike, or many other types), as well as several extra heads that differ from the main head. The "hair" and "waist heads" are conscious, but not separate from the main person; they all share a distributed, parallel consciousness. The upper body can vary from humanlike to draconic.
Aeduraegac have multiple heads (not necessarily 7) in some sort of symmetrical arrangement, as well as a lower body with at least 2^(dimension - 1) legs arranged in another symmetrical arrangement (so quadripedal in 3D, octapedal in 4D, 16-pedal in 5D, etc.). They were the inspiration for hydras in Greek myths. Their form usually varies from snake-like to draconic, but can occasionally deviate further. Aeduraegac have the ability to duplicate their heads, but they always duplicate in some sort of symmetrical, extendable pattern, which varies by the individual. Unlike the Greek myths, this is at will and not when heads are cut off. Their consciousness is distributed amongst the heads in a kind of parallel processing fashion.
Nrenqqecegac, from the waist up, are much like Brachiocrus Endbeings, with a symmetrical arrangement of arms, a head ranging from human-like to draconic, occasionally going wolf-like, cat-like, or other. However, from the waist down, they have leaves and roots, which can be controlled. They aren't rooted into the ground and can still walk, but it can be awkward as the roots have to constantly grip surfaces and release as they move forward, thus they are somewhat immobile on slippery surfaces such as ice and glass, and may get their roots stuck in thick mud. Luckily, if stuck, they can usually reroll their genetics into some other form, though like some forms of Endbeings, Nrenqqecegac are sometimes unable to manually reroll and resistant to radiation, meaning they're stuck in their current form for a while. In this case, these individuals often spend a significant amount of time under intense radiation to try and force a reroll to happen, though it will usually take quite a while.
Qwthaphegac are the most "normal" of the Phykommaton archetypes, though they're still a bit weird by human standards. They have a reptilian appearance with colorful metallic plates, and a large tail. Much like the upper bodies of Qamqpegac and Nrenqqecegac, as well as Brachiocrus Endbeings, they have a symmetrical arrangement of arms and legs. They typically have bilateral symmetry, but this may be trilateral, quadrilateral, quintilateral, or higher in less common cases. They have a visor-like eye configuration with an LED display made purely out of biological cells. Their feet are digitigrade and they always have weird thin horns behind their visor.
Chatqaibhegac's bodies have no internal organs, no vocal tracts, and no eyes. They communicate via telepathy, use objects via telekinesis, levitate instead of walking, and have "intrinsic vision". The intrinsic vision sees all angles around them as if it were projected to the inside of a hypersphere. By humans who know about the multiverse of non-Euclidean and higher dimension geometries known as The Stack, they are sometimes jokingly called Startesian Products. Their bodies are the Cartesian product of the surfaces of two uniform star polytopes, made out of biological cells. This is different from a typical Cartesian product. While normally the Cartesian product of two squared would be a 4D tesseract, the product of the surfaces inflates one by the other, producing a 3-dimensional torus with a square path and square cross-sections. This operation is also known as "spheration", and the order matters. As an example of a Chatqaibhegac, it could be a torus shaped like a regular octagram, inflated in 4D into the path that a great icosahedron might trace when travelling in a regular octagram path. Note that these can be any non-convex uniform polytope, and that compounds are allowed. They have the ability to rotate incredibly fast. Like Symbolacra, Toriphans, and Nrenqqecegac, they usually can genetically reroll just fine, but occasionally a form will lack that ability and be resistant to radiation. In this case, these individuals often spend a significant amount of time under intense radiation to try and force a reroll to happen, though it will usually take quite a while.

Due to mouthparts potentially being completely different, sounds in languages are usually based on the closest sound to the one pronounced, as speakers may not be physically able to produce certain sounds. There's also often genetic phonemes, which involve rerolling the forms mid-sentence. This has become cumbersome, so alternatives are often used such as a french R or rotating rapidly. Due to the constant reforms, Phykommatons don't typically die of old age or physical injury, but they aren't invulnerable and can die in various ways, most of them equivalent to causes of death on Earth.

Trivia

Nrenqqecegac are mostly based on Alraunes/Alarunes in Dungeons and Dragons, though there's a lot of explicit content surrounding these, so to research the inspiration, this article is a clean source.
The author has another somewhat similar fictional species to Nrenqqecegac called Xlalarunes (in a separate universe, for now). A bit of their lore and details of their constructed language can be found in this video, and their full lore is available in a pastebin.
Qwthaphegac are inspired by Vader-san's Synth species. In lore it's the other way around, where the ideas were injected into the 3D simulation into the minds of human artists, to give humans some familiarity with the concept.
For Chatqaibhegac, it's hard to find software tools that can actually generate slice or projection images of this easily, unfortunately, but more complex tools like CodeParade's Engine4D could produce better renderings of these, or perhaps someone could write a new tool to do it easier.