(General POV)
Location the Mass Effect World-Deep Space, Nameless Sector
Sovereign has returned from the other reality, meeting a actual God, unimaginable power, dark divine, dominion over all machine...both sentient and artificial.
Sovereign was closed off from the Reapers hive network, so the other accompanying reapers, flew towards their larger kin, who looked completely unactive...borderline on offline.
No respond, or power spike was emanating from the completely dark Sovereign, as the two other reapers were about to sent a message to the main fleet in order to decide what to do with the husk, that is Sovereign, when suddenly a burst of power and activity emerge from the form of Sovereign.
Not only that the design of a giant, six-limb crustacean, started to rapidly change, growing in size and width.
Sharp blade spikes of a Defiler, started to burst forth from the sides of Sovereign and it's legs.
More mutations and changes began to manifest from Sovereign, multiple silver with brass studded rings tentacles came out the splitted edges of the plates, showing wires and living flesh underneath the metal platting of the newly ascended daemonic reaper.
Three, very long tails sprouted from Sovereign, resembling slightly that of a scorpion, with a pair of sharp, long blades, which wedge into a massive daemonic laps cannon, in the center of all these new tails.
The optic lights of the face of Sovereign, started to take a twisted daemonic form, forming a rounded head with several curved horns with wires and tubes connecting said head with the main body, a trio pair of metallic, thick, black mandibles like that of a scorpion, with the gaps revealing a row of razor-sharp, metallic teeth.
Eyes of both machinery, and organic spread over the helm of the new head of Sovereign, a new brand manifested on the forehead of Sovereign, the mark of Vashtorr (dark mechanicus logo) in black.
Several limbs started to sprout from the metallic purple plates of Sovereign, two long pair of metal arms, and flesh...ending into massive three large digit claws, with sharp metallic edges, with crushing force these claws spread out, grasping and clamping down on the "heads" of the other Reapers.
Another pair of arms, grew from the body of the still changing Machine Elder Daemon, these were purely mechanical, with the round gear joints, being the mark of Vashtorr in brass, these arms ended in giant, razor-sharp, curved scythes with reddish coding surging through these blades, like energy pulses.
These scythe-bladed arms, swiped down, cutting and slashing apart at the two Reapers, every bolt, wire, scrap, chips, and parts being consumed and absorbed onto the form of the Elder Daemon, Sovereign's form.
In the silence of space, the screams and shrieks of the two reapers, was completely unheard, and all distress signals sent out by these lesser reapers, as Sovereign feasted and fueled his daemonic transformation, along with his power.
As Sovereign fead, his Dark Master, instructed him to set scorce to the planet of the Quarians, Rannoch, as a massive battle between the Quarians along with the crew of the Normandy, against the twisted and daemonfied geth...
Location Planet: Rannoch, Surface; Battlefield
Sometime have passed, the Quarians fleet has finally amass many ships, and returned to their stolen homeworld of Rannoch, and right now they under the leadership of the young quarian, Tali'Zorah vas Normandy.
Who was on the planet, at first she along with Shepard and other old companions and crewmmates, (I know in the game, you can only bring two companions into mission. But in reality, aside for Joker, everyone should enter battles and missions), were at first going to a stealth mission.
In order to distablelize the geth's planetary weapon and defense systems, but after making it to the main bunker that the Quarian Fleet, believes that all the planetary systems are linked to the a hidden console, underneath several subterranean levels.
The Geth began with calling back legions of their kind, back to Rannoch, this was unsuspected for Quarian Fleet, and the Normandy crew.
Then after the Quarians return to Rannoch atmosphere, the geth started bombarding the quarian ship...then as Tali and her companions, made a stealthily landing onto the planet, did the geth stop their assault.
And suddenly legions of geth, emerged from various tunnels, underground facilities, and much more, but these geth weren't the usual cybernetic beings, instead of just being metal and technology, these geth...they have dark, mass amount of flesh.
Some with multiple limbs either composed of flesh, or completely mechodentries, from four-bladed claws of steel and flesh, or fully cybernetic limbs holding macabre blade weapons, from blades, sickles, and what looks like chainsaw poleaxes, that bare the symbol of their Dark God.
These daemonized geth are more melee orientated, while the other geth, that are more gunner combat orientated units, of the children of the Arkefine.
These gunners, either their mechanized extra arm held one of the typical firearms of the universe, while the flesh and mechanize limbs were merger with macabre, antique Earth like weaponry.
From gatlin guns with a huge serated blade, like cleaver or chainsaws, as well as uncommon weaponry, from plasma cannons, meltas, and more, in truth these designs were inspired by the Dark One to the Arkefine.
Having been told of the Obliterators, that soon the Chaos Legions will possess among their ranks, but that's for the far future, the geth immediately sensed the mortals' souls, and the geth immediately attacked the Normandy crew, firing bullet heated in warp-fire, plasma blasts, melta bursts, and various pulse and bullets at their victims.
Shephard knew that this isn't a stealth mission anymore, turning to Tali, Shephard, to bring down the fleet, as much as she didn't want to, Shephard couldn't deny that a war has broke out in Rannoch, regardless of the Reaper threat, a war happening in allies' world, it a big risk.
Tali, she was also reluctant but the numbers of the geth, isn't something that Normandy alone can take on themselves, activating her omnitool, contacting the fleet, she said, "Counsel Han'Gerrel, Shala'Raan, Zaal'Koris, and Daro'Xen...unleash the soldiers!! This has become war!!" with her signal send to the fleet outside the planet's surface.
As dozens of ships, started landed onto the desolated, desert landscape, several squads of combat trained quarians, came out.
Aiming their guns at the mutated geth, firing at their longtime, mortal enemy.
With this the entire surface of Rannoch has become a battleground, geth unleashing all their daemonic fury, praising some unknown entity, called "Vashtorr", this confused Shephard and the others, especially Tali.
Her contacts with Legion (Geth), they originally believed that the geth were worshippers of the Reapers, and then suddenly they're acclamoring to a unknown xeno name, Edi tried to contact the Normandy system, unknowingly opening her network systems, and provide Chaos the needed crack to enter.
Edi, started glitching and twitching, before dropping onto the reddish soil, this shock the Normandy crew, that rush over to her, the Krogan, Wrex picked up Edi, as the entire crew rush to shelter.
Firing back to the geth, that were barely damaged by the firepower of their allies, and should any damage was sustained by the pulse and bullet storm.
Was rapidly repaired by some horrific creatures, a skull with arachnid robotic implants, these are their fellow lesser daemons, husk exos, one of the first daemons that the geth have granted passage into the Mass Effect world.
These strange and disturbing machines, were nothing that the quarians, or the Normandy has ever faced.
Meanwhile something massive, powerful, and no longer mortal, was swiftly navigating through the stars, heading straight to the world being swiftly corrupted, and claimed by the Dark God, the Arkefine, Vashtorr, the war has just begun for the Quarians and Normandy crew...