(Laharl/Chaos God POV)
Location the Nethervoid near one the Hell Spires
With my brother Khorne's swift birth fast approaching I need to make an Elder Daemon that would not only match the physical might of khornate daemons, but also outclass and be unstoppable and while I finally though of the perfect hellish beast to do so as Ba'al is my magical tactician this daemon shall serve as my personal daemonic warrior that none can harm for what I have plan shall make Khorne experience actually fear...and maybe a bit of jealousy.
I left my castle and setting off to the nearest Hell Spire to my castle as it serve as a perfect spot to use my FGDS and Greater Ascension on my latest creation and new son, while I soar in speeds that amaze me especially with that all those things involving flying and that Gods rule and traverse the skies make so much sense when you are one and are able to fly as I flap my three wings and in the view of maroon skies, black clouds, violet earth filled with spikes, patches of daemonic black leaf forests/jungles below and I sense the ever growing number of my daemons being spawned around my Nethervoid when the spire started to come into my line of sight and I started diving toward the ground landing hard against the daemonic earth of the Nethervoid.
Standing up straight I cracked my neck and used my Physical Shirt to retract my wings into my essence as I took a moment to inspect one of my thirteen Hell Spires, a dark spire covered in spikes and my loyal Knightmares patrol and guard the spire as I commanded that 13k Knightmares along with Slaughter Calvary to protect all these spires meant to another line of defense against mortal invaders making me excited imagining the suffering and futile struggle of Chaos Marines, Eldar, Humans and more trying to come to my hellish domain but I had more important things as even a moment wasted in the Immaterium could be the difference of an entire century to a entire microsecond in the Materium and knowing Khorne's rage, ferocity, hunger for battle, and lust for blood he'll immediately send his legions of Bloodletters, Bloodthirsters, Heralds, Flesh Hounds, Juggernauts, Bloodcrushers, Skull Cannons and if possible some Old World/AOS units since I don't know if this version of 40k that I've reincarnated merges chaos daemon rosters in my siblings legions.
Once again my fandom made me ramble again...I sigh before turning my back to the Hell Spire walking away from it, after I have gained enough distance from my Hell Spire I stopped walking and I commanded my cute little advisor, Aillia to use my latest Free Greater Daemon Spawning she responded with
(General POV)
The surge of daemonic and warp energy burst into a massive pillar of energies surging to the maroon skies above as a silhouette of massive figure was appearing in the shadow so immediately Laharl starting the same process he used to create and empower Ba'al Allseer rising his arms and pouring his dark powers into the Greater Daemon being born causing it to gain new feature such as bull-like horns on it head, great daemonic wings sprouted from it back, and it size and mass was growing as the surge from Laharl's as it trashed and roared this Elder Daemon being born opened it scarlet red eyes, and spread it massive arms with huge claws and objects connected to said right arm of this daemon as spikes started to form it was getting calmer as it appears to be kneeling before the one it knows to be his master and creator as its birth was almost finished and many battlefield with end in utter ruins and slaughter in it...his wake.
Laharl based this Elder Daemon in a amalgamation of various brutish monsters and demons from other medias combined into one beast a Elder Daemon that cannot be harm by physical means for his armor and skin are one and that armor is pure warp energy meaning it is both physical and not this daemon exist in multiple plains of existence and the only way to harm it is to hit it in each reality simultaneously hence physical attacks shall never harm him which are all that Khorne's army is specialized in, to grant him greater power Laharl made him able to be empowered battle the more carnage, slaughter, and ruination he reaps and is in the presence of the more powerful he becomes, possessing great ferocity, brutality, but not being a mindless berserker with great cunning, intellect, leadership and a great capacity to lead legion so unlike the mindless legions that charge at their prey that is one of those things that Laharl disliked about the other Chaos Gods daemonic legions even Tzeentch the so call knower of everything has savage, smart daemons but this his second son and General of Offensive Assault shall make all Khorne's efforts and aggressions to the Dark One useless.
Bestowing this Elder Daemon of Carnage with many weapons from it giant armored claws that can tear into Titan armor with ease, connecting his right arm with high caliber vulcan cannon, plasma bolt cannons next to the main minigun and warp-flamethrower granting this monster with many option on range death upon it victims the name of this daemon is Mordred Deathharbinger, the Unstoppable Carnage as the energy pillar subside and all the features of Mordred can be seen from it giant shadow like daemon wings spread wide and the next weapon in his body natural arsenal the long armored daemon tail tip by a large metallic spear blade baring the mark of Carnage edge to it and a Morningstar with long serrated spikes just below the blade and the colossal daemon Mordred look at his father and master closing its scarlet eyes showing reverence as he spoke in a deep, powerful voice "Master of Carnage. Great One of Chaos. My Lord and father I Mordred Deathbringer swear to forever faithfully serve your path of Chaos and corruption. All slaughter by my claws shall serve as mere minuscule morsel in comparison of the ruin I'll wrought in your name!> pleasing Laharl to have gain another powerful godly Elder Daemon under his command as he inspects his new son in more detail.
Mordred could rival if not larger than Ba'al in size and muscle mass, as it entire body is encased in a daemonic armor/flesh in dark purple resembling hell knight from helmed head with a sharp long forehead spike with the added bull-like horns on its skull that sprouted when he ascended plus a cross between a gas mask and face-guard in silver strap to it mouth area resembling a the mouth of a Bloodthirster all on purpose to mock his son ultimate prey, with a black rag worn around his neck slightly covering the chestplate baring the Mark of Carnage in light purple, maroon, and burgundy with the violet core held in the daemonhead maw is actually is the round amethyst with a dark violet eye-slit within model a bit after the "true" Warmaster's Eye surrounding the mark along with the shoulder pauldrons and thigh armor having black daemonic runes and designs, with many curved spikes of various sizes made from flesh and armor all over it massive arms and these arms had dark purple and violet huge braces with the exposed huge claws like a colossal class Titan Knight, then came lower body from his multi-layered thick tail and the pair of armored encased legs with trailing needles of silvers with cloven feet truly a the physical depiction of an actual "Devil".
But before doing anything else Laharl spoke "My son...my newest general you need a weapon suiting the Lord of Assault." with those word said Laharl he mentally commanding Aillia to use one of his Free Absolute Creation, with Aillia cheery confirmation did as he commands and a shining ball of blinding light appears floating before the Dark One, and just all other time the ball of light that is the FAC rushed towards the chest of Laharl reading his mind and intentions, shocking Mordred but before he could react a burst of warp energy erupted out the body of the Chaos God and started taking the form that the Dark One desired it to.
After the light deemed allowing for Mordred to see and be both surprised and amazed by the ginormous weapon that was stabbed into the ground in between himself and Laharl as the Chaos God spoke about his ability to command powerful things known as Warp Tesseracts to rewrite and create anything without limits using one to create this massive daemon sword for Mordred known as the "Slaughterbane" this giant sword with layered incredibly rough, strong, heavy that even Mordred needed to use actual strength to unearth it once his claw was on the spear-length like handle that sword bounded to Mordred opening the layers extending revealing extra-edge which was shining and extremely razor-sharp connected to violet stretched flesh that pulsate making this sword in multiform weapon, the most fitting daemonic living entity that is the Slaughterbane able to grant the sole wielder an advantage against magical based enemies upon opening up releasing a grim aura causing untold pain to Psykers that Mordred desires to kill, so it serve as the first and last line of defense for the Lord of Assault.