(General POV)
Location the Mass Effect World-Planet: Rannoch, Battlefield
A war unlike anything that's ever befallen the Quarians, a initial infiltration mission has become full-out war between these twisted geth, and the Quarians, with the geth gaining other machine creatures that are suddenly emerging out of nowhere and joining the Geth.
From human skulls with arachnid traits, to giant, fully armed, and aggressive, spider machines, (venomcrawlers), worms with shredding maws (silent stalkers), as well as other mechanized horrors.
From spheres of pure white, that open to reveal flesh core, and psionic power, (gatekeepers), female orange skinned, horned and tail aliens (codex), chromed skeleton machines, resembling humans (terminators), and what appears to be greater ranking, and more powerful versions of the previous machine. (Annihilators)
The geth, gained out of pure thin air, a full army, vast and taking on multiple role, in full warfare.
No battle that Shephard and her crew could compare, as drop ship, after drop ship came down from offworld, letting various combat trained Quarians, to join the battle.
The Quarians tech and weaponry, practically ineffective against the geth and their allies, as a Annihilator, with a metallic skull crown, a tattered cape, holding a plasma riffle in one claw, and a daemonic powered polearm, raised his weapon in the air.
Standing upon, the wreckage of a drop ship, brought down by a psychic wave of a couple of gatekeeper, the wreck still ablaze, with dead quarians scattered in the crash site, this annihilator, yelled out, "In the name of the Arkefine!! Terminate all these organics!!!" taking aim, and blasting a amethyst colored, plasma shot a quarian in reddish armor.
Blowing off the head, and burning the body of the organic xeno, the annihilator's words, railing up all it fellow vashtorrian daemons, as venomcrawlers crawled forward, unleashing auto-rounds at their victims, killing many quarian soldiers.
Garrus Vakarian, a Turian in blue armor, armed with a special riffle, managed to shot off the head of Terminator, only from his scope, instead of remains on the battlefield, it...started to fade, and banish like it was never there.
He wasn't the only one, that saw this happening, those fighting that have mental will, fortitude, and belief that they can kill these machines, are slightly able to cause damage, the magic of belief and will affecting the Warp, even if the Warp isn't truly there...
But for every enemy quarians, and Normandy allies fell, four more metal daemons, rouse to replace the fallen.
This battle, continues for the course of hours, and already thousands of the quarians have died brutally to these unnatural machines, just as Shephard a bolter round barely missed her red head, as she ducked behind a red rock, and the round exploded in some force on the reddish soil.
Panting, as she'd loud another magazine into her gun, when Joker called her on comms, "Joker what's wrong, is something happening to the Quarians fleet?", in a southern sounding tone, a man, Joker responded, "No boss its...it's Earth." for a moment Shephard's heart skipped a beat, believing that the Earth has fallen.
But what Joker reported, was way more shocking than she'd imagined, Joker told her, that the Reapers, they left the planet, friends from Earth report that something happening through the galaxy, suddenly Reapers leave in a hurry, and when ships go to investigate, scrap and space junk remains, floating in space.
First Shephard thought that, something might be threatening the reapers...but as soon as that thought entered her head, it scared her.
Something in outer space, was bigger threat to the reapers, and no one saw it tear apart, the most likely, most dangerous aliens in their galaxy.
Then Joker, started yelling and grunting, as he reporting that Normandy is having some difficulties, then a surge of energy unlike anything Joker, or the Quarians, or even Edi, that suddenly stopped fighting.
Frozen on the spot, as her eyes were glazed over, behind her visor, as she repeated, "The first son of the Infernal Forgemaster is coming. The first son of the Infernal Forgemaster is coming. The first son of the Infernal Forgemaster is coming." over and over, and more stranger, none of the enemies are aiming at Edi anymore.
Before Shephar, or anyone of the Normandy crew could go and help Edi, a massive burst of energy, a shockwave that knocked all the mortals off their feet, spread across Rannoch.
Then a grayish, bronze, and brass split, a rift in reality appeared over the horizon, as a titanic pair of claws, two on each edge, made of metal, and brass, massive and sharp, started to forcibly open this unknown phenomenon, revealing a monster, unlike anything seen by anyone.
Some believe a wormhole, was actually being forced open, on a planet surface as the pulled of the vacuum of outer space, was being felt as this entity was making its way through, onto Rannoch.
Then all machines, technology, and the ships in space, all started to fail, nothing was responding to any input or command, as the rift was fully torn open, and coming through a titan, larger than any recorded Reaper, with multiple arms with three clawed pair, sickled ending pair, a pair of firearm one a giant heavy-bolter with a serrated blade, and the other arm a multi-barrel auto gun, along with several metallic and fleshy tentacles with various tips, a scorpion mixed venomcrawler like head on front with several eyes.
The symbol of Chaos in black, around the dark mark of the Arkefine in brass and steel, in display for all, multiple plates of metallic armor, some flesh shown between the openings.
Multiple insectoid legs, with ginormous, razor-sharp blades for legs, at the end of the joints, three scorpion like tails, spikes, and various armaments.
From daemonic laps-cannons, hidden torpedo launchers, heavy melta-vulcan cannons, and much more.
Roaring as Sovereign, the first Elder Daemon of Vashtorr, has descended to Rannoch, his presence caused all the ships in orbit to start crashing, all systems shutting down, at the Elder Daemon's corruption.
Plus many ships near the system, which enter the range of Sovereign psyker power, and technological link, were being pulled to the planet, after Sovereign consumed soo many reapers, absorbing their sentience, systems, powers, and part, growing himself in form and power, he came to the battlefield, speaking in a synthetic, and daemonic sounding voice, "Let this world, serve of as the altar!! These mortals sacrifice to our dark master!!! And their blood, the soothing oil on our flesh and steel!!!!" Sovereign's words, inspiring the bloodlust of all these machine daemons.
As Rannoch became the final battlefield for the entirety of the this world, all in the name of the Arkefine...
Location the Warhammer 40k World-The Immaterium: The Neutral Space-The Infinity Fountain Resting Place
Back in the white void, that is the Infinity Fountain's resting place, the five Dark Gods, watched the latest achievement of the Arkefine.
Khorne started laughing in a pleased tone, as he was impressed further by his new younger brother, Vashtorr, ruthless brutality, and strategic mind for bloodshed, Laharl was the same enjoying the terror on the mortals in the Mass Effect world, the carnage and ruin, befalling to that world.
Nurgle isn't the biggest fan of machine, but the death was quite amusing, and Tzeentch once again is admiring Vashtorr cunning, intellect, and schemes, he'd led a entire xeno extinction to empower his first Elder Daemon, and there still Megatron, the Left and Right Twins, for the Arkefine to recruit.
If Vashtorr's shadowy silhouette, could smile...better said his dark divine form, could smile, he'd would, as this was surpassing all assumed statics, that Vashtorr calculated.
What most impressed him, is the power and loyalty of such a daemon, all focused to him, Vashtorr was eager for more, he'll have to...thank...the Dark Harbinger, for convincing him of this action of corrupting, and assimilating otherworldly entities into his daemonic legion, it was time to move on, as Sovereign is his now...