Ylemoma is a theoretical proposal to explain the existence of Pillarite, an exotic form of matter that defies the known laws of physics, and the enigmatic Pillars. Pillarite, the material composing these Pillars, is hypothesized to be seditious matter a substance that does not conform to the fundamental laws of our universe. It exhibits properties that seem to reject causality, thermodynamics, and even the consistency of physical constants. Ylemoma, by extension, is theorized to be seditious spacetime, a cancerous distortion of the primordial fabric of reality. Within Ylemoma, the conventional forces electromagnetism, the nuclear forces, and even gravity are not merely absent but fluctuate unpredictably, creating zones of a-causal chaos where the very rules of existence unravel.
The term Ylemoma is believed to have dual origins. The first is scientific, combining Ylem, the ancient term for the primordial matter of the universe, and oma, a suffix denoting disease or abnormal growth. This etymology reflects the concept of Ylemoma as a corruption of the universe's foundational laws. The second origin is cultural, rooted in the extinct religion of a small, secretive clan from the world of Odelke. Their god, Ylemoma, or "The Throned Growth," was said to be the source of all magic and divinity. The clan's practices, which included ritualistic sacrifice and cannibalism, were reportedly aimed at obtaining a "grain of Ylemoma," a substance that would grow within them, shortening their lives but granting visions and sorcerous power. Modern scholars speculate that these practices may have involved exposure to radioactive materials from their colony ship's reactor shielding, inducing hallucinations and serving as a brutal rite of passage. The Ylemoman texts remain untranslated, as the clan was nearly eradicated during the Yscenic occupation of Odelke, leaving only fragmented temple records and secondhand accounts.
The connection between the scientific concept of Ylemoma and the Odelken deity is a subject of debate. Some believe that Isarcus Jursre, the Temple diacon who first hypothesized Ylemoma, named the phenomenon after their god. However, critics argue that the linguistic similarity is coincidental, pointing out that Jursre visited Odelke over a century after the Yscenic genocide and had no direct access to Ylemoman texts. Jursre theory has been criticised as a far too circular framework to explain the existence of Pillarite and the Pillars.