The Engine churned, a construction of materials unbound by reality and drenched in the heartblood of daemons. Forged upon an anvil of souls, hammered into shape by the might of Chaos eternal. An Engine given form of terrible power and nature, one reflecting all that it had been forged of. Now it remains a silent and eternal monument to evil, upon the world, the prized possession of a daemon prince of chaos.
Its influence reaches across the world, twisting everything to the ends of Chaos, bending everything towards what it truly was. For it was only half a step removed from Evil, but it was not in full, Eldritch afterall was ever more confusing than mere Evil could ever be. Time and space mattered not to the influence of Eldritch, impossible secrets were easy, simple knowledge became impossible.
It was the final remenant of the species of this world, those that were the first to suffer the immitation of Chaos by the hands of humanity. The Pattern Screamer fell upon the world with unending strife and horror, all consumed by its nature and forced to obey its dictates, but there was ever a hope and through deals struck in haste and uncaring of the cost, Vashtorr of the Forge of Souls took an interest in the world of mundane evil and industry.
He gave to the falling species a design holding the nuclues of a daemon god waiting to be, one that was connected so very deeply to the Eldritch that it paved the way for the machine to churn into life. The Eldritch Engine came to life with that last spark, a mountain of corrupted metals and wiring, with horrific runes blazing upon all its non sensible dimensional structures, all around a cage holding the unborn shard. Its roots sunk deep into the heart of the world, reaching outward across the world to bring a pall of the Eldritch over all within its domain.
Yet, even it was not enough to halt the Pattern Screamer, for the works of men were not so easily bested at their apex and so the species wrote more pacts.
Bargining their future against the needs of the now, to gain expertise from the Forge of Souls, to understand the concepts needed to succor their people agianst the assault of the Screamer. This second set of pacts revealed to them the core of Shadow, that which was Shadow the all obscuring darkness, that which could hide anything from anything else. From a shard of Be'lakor's own might stolen from him in one of the countless wars of Chaos, it was invested into the pacts written in blood and signed in souls.
From this shard the first Engine of Shadow came to be, it was a primitive and weak thing compared to the glory of the engine that Vashtorr provided in his own right. Forged by mortal hands as it was, but it was enough to bring safety to a region and so more were built in the image of the first.
For a time this sufficed, the Shadows covered the world, and the Screamer fell silent, but it adapted in the arbitray physics of the world, it began to infect the very Shadows that gave refugee to the species below. In desperation the people turned to the first Engine that which made physics unmorred and malleable, the engine that corrupted all aspects of reality, the Engine Eldritch and merged it with the first of the Shadow Engines the one that contained the shard of Be'lakor's might.
Together the engines combined, merging Concepts together as could only be expected from divine artifce such as the first Engine. Vastorr took his price for their blasphemy as expected, but it was a small price to pay against survial of species. From the Shadow and Eldritch Engines merging the Penumbral Eldritch Engine came to be. All other Engines of Shadow became bound to the influence of the Eldritch even as the shadows writhed with madness of an Eldritch sort. The very fundamental aspects such as numbers, distance and time became affected by Eldritch nature and ceased to matter upon the world under the eternal shroud.
The world fell into an ever changing cycle as the Shadow Nexi shifted in number and location. Always remaining within the numbers claimed by Chaos, but the effects and nature of the world shifting as the Nexi shifted. On the times when 5 Nexi blocked the light from the void above, the influence of technology was felt, machines acted faster, were produced faster and all became more efficient. It was perhaps the most beneficial of the numbers, yet as with everything it weakened the shroud and the Scream could breech the darkness.
When 6 Nexi obscured the light, the shadows became alive with illusions and wonders impossible, a perfect embrace of darkness where nought but darkness could be seen. Distance ceased to matter and time folded upon itself in manifold directions. It was a time of Chaos as everything lost what little sense it held.
7 Nexi held back the light and brought with them stability, the influence of Madness and the Eldrich waned. Stability would come to the world, impossible events frozen or undone, shadows becoming just Shadows rather than Eldritch Shadows. It was a time of relaxation for the people of the world.
When 8 are present the Shadows thunder with warhorns and weapons bleed into existance caked in blood. Weapons seek to bleed their foes and the world itself forces fights to achieve, an eternal war descends upon the world as time twists to ensure that all remain alive and bleed fiercely from their wounds without end.
If 9 Nexi dot the world then all sense leaves as chaos rules, the nature of the world becomes entirely unknown, secrets that would have taken eons to discover might take moments or ideas that would be a single thought away take an eon to ponder. Terrain falls asunder as the influence of the Eldritch is felt upon everything at its deepest core until nothing but the Eldritch remains as Shadow becomes structure and physical.
The Scream could not be defeated it was found, the Eldritch Shadows became host to it in time and the world died slowly and painfully, last ditch efforts tried in vain to survive in some form. The final being a grand sacrifice to transmute the species into a daemon of Chaos, a prince of power that held the first Engine as their symbol of power. Ky'zutar came to be in that moment, born from the lifeblood of a species funneled through the Engine of Eldritch and Shadow power, the seed of the daemon held within and the shard of eternal shadow consumed to fuel its ascension.
Yet, the world remained touched by the efforts of those that strived to preserve their lives. Madness and genius so often share the same coin, only made more clear by the influence of Eldritch upon the world. Nexi of Shadows could not banish the darkness of the Pattern Screaming eternally within, but some thought that perhaps Light could burn away the infection. Their work upon the Engines of Shadow done in secret, but without success for they were soon discovered by the whispers of daemons that watched the world and saw the blasphemy being preformed.
Dragged to the sacrifical alters, they were among the first to have their souls and blood fed to the Penumbral Eldritch Engine to begin the churning and forging of the daemon prince to be. Yet, their labors remained untouched for who would know or even believe that those that followed the whims of Chaos would ever seek the Light that so oft burns those of darkness. A madness without equal indeed, and so it was not considered by even the mad of the world, their work considered to be mundane attempts to remove the Engines of Shadow.
In the end it matters not for they were fed to the Core Engine and the rest followed. As the Engine churned ever on, the souls within being combined and alloyed together into a conceptual alloy, Ky'zutar came to be, a daemon born of a species, pure of those flaws so endemic to those of chaos a proper herald of Vashtorr.
Now uncountable eons later, the world is silent, a shadow cloaked grave with daemons all that remain, tending to the Nexi even now, held firm by pacts held now by Ky'zutar for eternity. Upon the Engine does the prince of the world sit in state for all of time, a momument of darkness and unchanging nature the final protector of the Engine forged by Vashtorr's own hands. A Favored of the Forge of Souls and one of the most prolific innovators and masters of the conceptual arts, already they look beyond their current station to the ranks of the Honored preparing plans to ensure their coming ascendance through consumption of other daemons.
Vashtorr is their liege and their pacts are firm, infighting within the Forge was not tolerated and so they stared beyond to the rest of Chaos and had chosen Tzeentch as their target. The weakest of the four greater gods of Chaos, the one with the fewest yet remaining masters of power and, the closest links to Eldritch and Shadow.
As the daemon prince plots, the Engine churns ever onward, its relentless grinding of systems never halting even when it should. Its understanding that of the daemon prince to whom it is bond, but different for it sees things in an impossible form even for a daemon prince of madness and eldritch nature.
Its avatar a formless mass of twisting shadow looks beyond the world and sees an army coming. The cursed Light comes with them, it sees even now how the leader of the force shall wield Light itself as a weapon against Shadow. Preparing countless rituals to ensure that never would they be outmatched, but the Engine sees it all and scoffs for it knows that it and its master shall not fall, they will survive and beat back this incursion.
It also sees that the one that shall carry the Light, will bring forth Time and Death upon the world, as weapons born from rituals and mastery of Concepts. Within the shadow of the coming Hero, lies the yet uncompleted Trinity of Time, Death and Undying, a concept that it knows and does not know. Fear trickles into its nature as it beholds the truth that he whom comes shall know what it truly is and wonders in its own way if the Shadow Nexi will truly bar the way to its heart against this force.
In the end it discards that consideration for it is Eldritch and Shadow and nothing can breach its sanctuary or harm its master.