With Triton secured and the Ghost fleet was being taken care of, the rest of the Imperium's forces turned its full might toward Neptune itself.
The Compact's final bastions lay hidden within the planet's atmosphere, floating citadels suspended within endless storms.
These structures were colossal, their forms partially obscured by churning clouds and electromagnetic interference.
Void shields shimmered faintly around them, distorting incoming scans. They were mobile and heavily armed. Conventional assault would fail, the Imperium adapted.
Fast cruisers and destroyers were selected for the attack, their captains briefed on the risks. One by one, they descended into Neptune's upper atmosphere, their hulls groaning under immense pressure and friction. Plasma wakes trailed behind them as they plunged into the storm.
At close range, they opened fire.
Lance batteries discharged in concentrated bursts, striking shield generators with precision. Macro-cannon fire followed, hammering weakened defenses until they collapsed entirely.
Then came the assault forces.
Drop pods and boarding craft were launched directly into the citadels. Astartes strike teams breached hulls mid-flight, cutting their way inside as the structures drifted through violent currents.
Combat was disorienting, gravity fluctuated, corridors shifted, and entire sections were vented into the storm below, still, the Astartes pressed forward.
The largest citadel, believed to house the Compact's leadership, became the focal point of the final battle. Its defenses were the strongest yet, elite troops, advanced weapons, and layered security systems that turned every corridor into a deathtrap.
The Imperium answered with overwhelming force.
Multiple strike teams converged simultaneously, their advance coordinated with orbital strikes that crippled external defenses. Inside, the fighting reached its peak, close-quarters brutality, every meter contested, every gain paid in blood.
At the heart of the citadel, the Compact made its last stand. Which did not last.
Neptune did not fall in a single moment of triumph. It died slowly.
The destruction of the final citadel marked the end of organized resistance, but the system remained fractured. Isolated stations attempted to flee.
Hidden outposts activated distress signals that would never be answered. Remnant fleets scattered into the dark, only to be hunted down by Imperial patrols. One by one, they were extinguished.
The last act of defiance came from a descending citadel, its reactors deliberately overloaded as it sank deeper into Neptune's atmosphere. The explosion lit the storm clouds from within, a brief and violent bloom before darkness reclaimed it.
After that, there was silence. Compliance was declared.
The outer Sol System now belonged to the Imperium. Neptune's orbital lanes were secured, its remaining infrastructure catalogued and repurposed. Shipyards, though damaged, were brought back into operation under strict oversight.
Garrison forces were established on Triton and other moons to ensure continued control. Above the planet, the Imperial fleet gathered.
The void was filled with wreckage, Imperial and enemy alike, drifting together in silent testament to the battle's cost. Recovery crews moved among them, salvaging what could be saved, marking what could not.
There was no celebration, only duty.
From Terra to Neptune, the Emperor's will now extended unbroken. The Sol System, cradle of humanity, had been reforged into a weapon, ready to fuel the endless expansion of the Great Crusade.
And beyond Neptune lay the void. The crusade for the revival of man and taking its birthright is about to begin.
As the war was drawing to an end in the Segmentum Pacificus, Sabbat Sector, Verghast planet.
A new family arrives with the other refugees into this growing hive world. A baby named Jorren Nox, along with his mother, met with his father who had come earlier to settle and provide a more comfortable area for his pregnant wife.
"My heart... you are changed. Has the child tasted the void air already? I did not think the term was so close." Her husband came over worried about the situation. He sometimes stole glances at the child sleeping in her arms.
"Fear not, my love, this one was eager to see the stars. He came to me while we were yet trailing the wake of the Gyuran." she answered as she looked wormly on the child.
"And what name does he carry into this new life? Who shall he be to the Hive?" the husband asked saddened that he did not name is son
"Jorren Nox, my husband" she said as she presented the sleeping baby to him.
What both parents did not know was that the child they assumed was sleeping was not. Jorren realized a big problem he did not think of when he was searching everywhere in the Immaterium.
There are things with minds of their own with the place. While trying to meditate he noticed a bluish purple stain on his previously pristine silver soul. He has been trying to see if he can remove it, and as his parents are talking his mind comes into contact with the color.
"Hahaha, A keen eye for a stolen spark, you found my signature sooner than others, little shard." An ethereal voice sounded in his mind.
"I was expecting to see from your view you more often before you will notice. You have a true hunger for knowledge don't you."
"Shall I unveil the tapestries of the Unspoken? Shall I show you the 'Why' behind your very existence?" an image of a bird with 2 heads smiling at him is projected to Jorren's mind.
'This is going to be a problem' Jorren said to himself. He did not acknowledge the creature, for now he needs to contain the spread of the contamination of his soul.
In other parts of the galaxy 2 souls burst out of the Immaterium into real space.
One moving towards the jungle and the other moving towards the Sol system.
The jungles of Catachan saw the birth of a newborn with a birth mark of a vine wrapped around a dagger.
Ganymede saw the birth of a newborn with a tattoo of a staff with bird wings at the top and snakes coiling around the bottom.