The Universe of Warhammer 40k was dangerous; it beheld countless horrors, both physical and the twisting in the shadows in the corner of your eyes. Literally were actual monsters writhing about and trying to enter your mind to take over your body and have you wreak havoc.
Entire worlds every year went dark and were lost to Warp Storms, storms of psychic and 'magical' energy that engulfed the planets. Twisting the world's occupants into monsters, and often.
The world just disappeared like a pebble of sand that was pulled into the tides of the Ocean of Souls when the storm passed over.
All those horrors, the physcial threats like Orks and Tyrranids. Well... They all had one rather major 'weakness' I quickly found out.
They weren't fucking immune to a boosted Halo Ring blasting its death pulse of annihilation that destroyed both spiritual and living flesh bonds.
With each pulse of the Halo Ring, entire worlds that were over taken by Tyrranids who were farming the Octarius Sector's worlds to farm Orks for biomass were wiped clean and turned into sea's of biomass as the Halo Ring's broke the atomic bonds that allowed living flesh to keep together.
Which then allowed me to move in... And with the quickly growing Brother Moon, I was forming using the help of the controlled undead Hive Ships I had taken over with the Markers.
It only took three worlds infected and overrun by Orks being cleansed before I formed a true Brother Moon. A mobile Gravemind, made up of almost entirely cerebral flesh.
Trillions of Orks and Tyrranid's 'donating' their bodies to this cause, and with a soft squishing noise. I sat upon a throne of bone with tendrils of flesh and brain matter connecting to my own mind in the center of the Brethren Moon I had formed.
"I am here. A monument to the sins of the galaxy... Did the Emperor bring me back to wipe the slate clean?" I mused as I felt the Grave Mind roaring to life.
A planet-sized mind. The sheer size alone of such cranial muscles would create it's own Warp Storm as it flexed it's might on the Sea of Souls.
As each god coming to life and dying was not something subtle. Not even a god's death was needed to destroy an entire sector as I recalled an extremely powerful xenos hive mind that was killed during the Great Crusade, whose death scream wiped out all the astropaths and anyone warp sensitive in it's sector.
Myself? A Primarch fused with a planet-sized brain to offload the load of psychic power would be beyond that hive mind xeno. And it wasn't like I was going to stop either.
Just because I was planet-sized for now... Didn't mean I couldn't become solar system-sized or bigger!
My mind expanded as I felt bone tendrils from the Crown of Penance I wore on my head crack into my Primarch skull. New nerves from the core throne I was upon intraced within my mind, which linked me with the Gravemind.
And as my soul, my mind expanded I felt the Warp so much clearer. I could... Feel the different layers to the warp. The warp which was called the well of Souls for a reason.
Within the warp. I felt true fury rise up within myself at countless demons coming through the swirling multicolored chaos around me.
And with a chuckle that rang out hollow. I silenced the mad laughter of the gods whose game dared include me.
I burned. Like a sun. A new light house within the Warp I burned with a fury of trillions of souls' worth of mental power.
My flames were not the gold purity and fury of the God Emperor. They were a searing white flame of pure hate that blinded the Astropaths who dared stare directly at me. And the demons cast in my light were burned away into more fuel for my spiritual ascension.
The Light of the Traveler within was corrupted by my hate for the demons and the darkness of this universe. The sheer... Hate I had for this fucking shit hole, and how I missed my few friends in the legion I made.
I missed Barghest. I missed the giant oversized golden retriever who, although she lost her signature Ogrn stupidity. She never lost her innate kindness and joy in the simplest of things. And simply didn't care about how terrible this universe was.
"Where are you Barghest... Where are you in this sea of souls?" I whispered with my voice carrying across the Empyrean before I refocused my longing and despair at how terrible this universe was.
Into something far more productive.
My gaze within the warp twisted, and upon seeing the twisting crystal fields, non-Euclidean castles, endless mazes, and madness, bringing styles of the Changer of Ways I spoke in a voice that I knew would reach the Father of Lies and Deception.
"Burn. You feathered fuck." I spat and I flared with ALL my power as I sought to replicate my father's feat in burning Nurgles' Garden when he saved Guilliman's soul from Nurgles' grasp.
My spiteful fire burned across Tzeentch's realm like a furious wave of white fire that clung to all exposed surfaces. And the twisted light of the Traveler burned through the magical darkness of the realm, allowing my flames to sink... Nice and deep into the realm.
Greater Demons of the Changer of Ways screamed and threw mind-bending sorcery and warp craft to send the flames away. To block them or even open portals into what looked like the Webway of all things.
But I radiated power endlessly even as I felt the flesh of the Brethren Moon starting to overheat with the power I was drawing upon.
Yet... All I could feel was further fury as I realized something.
Fucking Tzeentch wasn't in his realm. He had skipped town and even as his crystal palace melted into slag under my sun like fury. He never showed up.
Not only that. But I noticed all to clearly that I didn't 'recognize' any noticeable demons. And more importantly... Not even a single fucking Thousand Son's legion was in the realm let alone Magnus himself.
"Fine... You want to hide, then I will go through the entire fucking Warp to find you. I will do what Horus promised through your hands up his ass using him as a muppet. I will burn this galaxy down to its final ashes, blot out the stars as I wipe your taint from this reality!" I screamed into the Warp.
But all I received was the laughter of cruel gods who found my threat a joke to their 'great game.' But I would prove them wrong. Prove them all too wrong so much quicker than they could ever realize and prepare for.
My gaze turned from Tzeentch's burning empty realm, and I looked down towards Nurgle's Realm. If I stole a certain Eldar Goddess and integrated her into the Gravemind... How much more power would I be able to call upon to burn the Warp away?"