Right first things first I'd like to mention that this is my first attempt at fan fiction after reading many others and I thought why not give it a try myself as I've had many ideas of what my own would entail, so I hope you find it appealing.

This is an SI/OC story which will expand across the events of ME1, merging the OC's into the the main characters journey from more or less the first chapter which is why I've added a prologue to introduce my OC's and give you an idea of who they are, what they're like, names etc etc etc. I've added a little back story of my OC's as much as I can but not too much, as I'm going to be doing several flashback scenes throughout this story at certain points to explore their personalities and give depth into why they are the way they are. I'm also telling it from a 3rd person view and may divert from canon because of the usage of OC's, but hopefully not by much.

My Shepard is default/war hero/spacer/soldier/paragon with a default name John Shepard.

Many thanks Barnett

ps please review good or bad and any tips or pointers are very welcome.

Disclaimer

I do not own the rights to Bioware or any of the related aspects of Mass Effect.

Mass Intervention : Prologue

Earth 0

Half of England lays in waste...millions were dead, there were fires, riots, mass destruction, murder and complete ultimate chaos due to a cosmic entity from the multiverse known only as Abraxas by the ones that follow him.
Not much is known of the entity. Only that due to being incorporeal in our plane of existence, it has to select a herald to carry out its every command. Once he/she has been selected, they can begin their cycle of death and destruction in the name of their new master. Abraxas prides himself on be able to spread his infuence, attacking the weak minded and corrupting the livng soul into something evil in a quest of dominance and power. But with every negative there is a positive...

Following Abraxas, came another entity known to some as 'Bishop'. Also Incorporeal, taking the form of an aged African American man dressed in a white modern day suit. Bishop, like his evil counterpart also went in search of a herald to fight Abraxas. Thus protecting the planet from a hellish fate...

Location : Old abandoned industrial site, Leicester, England 2013 - 6 months after the arrival of the entities.

The 2 brothers stare each other down, their different coloured energies flaring violently around each others bodies in the dark night. Both men holding their katana swords in a stance, ready to attack. They're both dressed in modern day, light-weight body armor similar to what riot police would wear, but customised it to fit their own tastes.

The older brother Scott Campbell was chosen to be herald to Bishop, to fight the evil that has come to his world. He charges his powers, causing the aura generated around his body to radiate blue in colour. Minus the inhuman blue display of power eminating from him, he is a 6'2, dark short haired 28yr old white male, athletic, but well built due to his time serving in many tours as a 2nd lieutenant in the British Royal marines.

While the younger brother, Ross Campbell, whom is the chosen herald to Abraxas. He is a 5'11 dark short haired white 27yr old male. Also a military man who served in Iraq as a Staff Sergeant in the British Army. A common ground that both brothers once were most proud of. The energy aura generated from his powers radiates a bright crimson red around his body. Once an honerable man, but now stands transformed into the personification of evil.

"Ross please! We don't have to do this! Fight it, before its too late! I know you're in there bro, don't let it take you. You're stronger than that thing is." pleads the older brother.

Ross's eyes ripple with a red fire while he grins "Fight what Scott? The sheer power? The strength? The authority? You feel it too don't you? Our powers are at their strongest when we are together. Join us and we can rule all mankind as true gods! The old man you fight for is weak and foolish to believe that this is not our true destiny. Just look around you? Is humanity really worth fighting for? We've fought for years spilling blood in wars and battles in the military. We watched our friends die for this poor excuse for a civilisation. And how do we get repaid? By watching the ones we love the most get snatched away from us by the very people we were fighting for. I say fuck that! Time for a change." He cracks his neck side to side "We both know our powers won't have any affect on each other and I'm thinking that I'm more skillfull than you with a blade, so I will give you a choice." He smiles evilly, "Join me and be a god... Or die?...What do you say o brother of mine?"

Scott cant believe that this man in front of him was once his younger brother, his best friend, a soldier...and the only family he has left. He then looks around him at the orange glow caused from the fires in the dark sky, at the destroyed buildings where a civilisation once flourished which now reeks of nothing but death.

He realises that the only one way to stop all this from spreading across the globe, is that he's going to have to finally kill his own brother that he still loves dearly. "Not a chance in hell, little brother, but I'm giving you one last chance...Stop this now or I swear to you, Ross...I will kill you if I have too, if just to save you if anything else."

Ross shakes his head actually amused "HA! Kill me? Are you for real? I'm power incarnate you fucking idiot! Go fuck yourself" he spits back.

Then all of a sudden with lightening speed, Ross charges Scott with his blade, swinging it towards his neck. Scott reacts just as fast by motioning to the left to block the attack and counter-acts by spin kicking his brother in the back of the head making him stumble backwards. Ross quickly recovers and turns, swinging his katana once again in a series of attacks to which Scott keeps deflecting each time accordingly. Sparks fly from the impact of blade hitting blade until a brief moment of pause and both men take a few steps back. The brothers realise that they seem to be evenly matched in not only power, but skill also.

Scott then goes on the offensive by faking an upper body attack with his weapon and then drops down sweeps Ross's legs from under him. Ross slams onto his back dropping his katana and Scott kicks it away. Scott raises his own blade with both hands ready to impale his brother, but suddenly hesitates...He cant do it. Flashing memories of the man his little brother used to be flood his mind. The childhood they shared together, the times he they were always there for each other all seem to enter his mind at once.

This brief moment of hesitation is just long enough for Ross to use his powers to call his katana into his hand, then impaling it straight into Scott's shoulder and kicking him with such strength, he flies backwards into the air with incredible force. He slams into a still half standing wall which such velocity, it collapses onto him and buries him completly. Ross gets to his feet with the intent of finishing off his sibling, when suddenly he hears his masters words beckon him and as expected, he sees a black hooded figure appear before him. His master...Abraxas.

"My Herald...You have served me well, but I grow impatient with our conquest of this world, as well as the constant interference of your brother and my oh so noble counter-part he serves. I know of another reality in the multiverse where my essence will not only spread over that reality's earth, but the entire galaxy. There are forces at work in that there that we will influence and take advantage of to serve our needs. Now come, as the journey will take much of my power and I shall need time to recover."

"NO! I'm going to finish this! He's right there for me to finally kill once and for all and I won't let him live now, not even for you." The dark herald fires back. He walks onwards towards where his brother is buried when suddenly an invisible force lifts him in the air, paralysing him in severe pain. His every fibre in his body feels like its on fire as he tries to scream, but can't.

"ENOUGH! You shall do as I command you ungrateful dog! I gave you your power and I can quite easily take it away...Now, I shall open a portal to this new reality and you shall do as I order you to without question!" The dark entity commands.

Abraxas lowers Ross down to the ground, realising him from his hold. He holsters his katana on his back whilst standing up. "Yes...my lord." He then turns and walks through the portal behind him, vanishing as commanded. Abraxas follows behind.

Scott regains consciousness, and realising that he's buried he quickly releases a charge of his powers, blasting away the brick and stone rubble that fell on him, letting out a roar of pure rage. "AARGHHHHH!"
He pushes the pain back from the bleeding wound on his shoulder whilst scanning the area for his brother, but finds no one. 'Why would he leave?' He thinks to himself. Then he hears a voice behind him that he knows all too familiar.

"Hello Scott." Bishop greets his herald. Standing there with his hands behind his back, dressed in his usual full white modern day suit.

"Where did he go Bishop? We have to stop him and Abraxas now, once and for all, before they destroy the rest of the country." He urges Bishop, while holding his hand over his wound feeling it starting to heal already, it should be as good as new in a day or two.

"They're gone Scott. Abraxas took your brother across the multiverse to another universe entirely. Where he thinks he can not only gain more power, but cause much more death and destruction by using an army of what i can only describe as celestial beings and again, using your brother as his General. I didn't think my evil counterpart had enough raw cosmic energy to travel to that particular universe again, as it's also located far in the future where humanity has drastically changed. Humans there have now ventured to many worlds and solar systems via space travel, using 'faster than light travel' technology and can travel great distances in minutes using something called 'Mass Relays'. Many new species of life now flourish across the galaxy there with equal advancements in their own technology, with their own governments, politics and councils. Some far more superior and advanced to the human race."

"Are you having a fucking laugh Bishop?" Scott cuts in, trying to process the information his cosmic friend/teacher is telling him. He thinks about asking how he knows all this, but he gave up on trying to make sense of Bishop back when he first came into his life 6 months ago. The man isn't even from this universe let alone the same galaxy. What he does know is that he was chosen to defend the helpless, protect the innocent and fight this evil to his last breath. It's why he became a marine in the first place...He thought his brother was the same as him...But he quickly shakes that trail of thought from his mind. He needs to keep his head in the game.

"What now then Bishop?" He asks, already knowing the answer.

Bishop smiles, knowing that he made the right choice with Scott as his Herald. "Now we go after them, but there are a few things you need to know before we go through. Firstly your powers will decrease significantly due to the distance gained between you and your brother once you are there. Here on your planet it was a matter of miles between you, where over there it will be a matter of planets or even entire solar systems expanding the galaxy. You will retain a your superior physical attributes in regards to your strength, speed, agility, skill and endurance which will aid you in physical combat, but you must learn your limits quickly. Your energy based abilities will be completely gone until you come in close contact of your brother again to re-charge them, though you may retain some of your telekinetic abilities. You'll have to see for yourself once you arrive. Secondly you will need to find allies to help you, as I will not be able to assist you directly. I will be nothing more than a ghost whilst I'm there unfortunately. Even to you my friend."

Scott cuts in, "So let me get this straight Bishop...You're sending me into a universe in the future I know fuck all about to take down my bro and the 'big bad', who may now have a big ass fucking army as well as my brother backing him up. Your also telling me that I'm going to lose the majority of my power and I'm also going to be doing this on my lonesome as well...Why don't you kill me now mate?" He sits down on the ground leaning back against a piece of a wall.

Bishop raises a hand in defence and continues. "As I was saying, the reason you will have to through this mostly alone is because to send us there it will take most of the power I have and I don't know how long it will take me to recover. Weeks or maybe even months...I don't have the answer to that. But that doesn't mean I can't keep watch over you from time to time on your mission. You won't see me or know I'm there but I may be able to nudge you in the right direction or help influence you on the important choices that could drastically affect your mission. I know this is a lot to process my friend, but trust me when I say that I chose you for a reason. It was the qualities you behold like integrity, bravery, selflessness, indomitable will and your ability to overcome great fear that makes me firmly believe you can and will succeed in defeating The Darkness that threatens the universe we will travel to. Maybe even your brother can be saved somehow, because if anyone can find a way... It's you."

Scott looks up at Bishop. Even though the 'man's' words ment a lot to him, a huge wave of doubt now hit him. "Thanks for having the faith and all that in me Bishop, but I have to say I'm fucking scared shitless here mate. This just got a whole lot bigger than me, my brother or my world not to mention." He looks up at the night sky running both his hands through his hair and over his face, taking a deep breath. He thinks about his tours in Iraq with the 33rd regiment when they've faced overwhelming odds in battle, never giving up and always completing their missions.
Using that memory, he finds his resolve "Do you know what? Fuck it. I ain't leaving my brother in some fucked up future reality or whatever that place is. I'll either save him or kill him myself, and if I don't die in the process then I swear to God himself that I'm gonna kill that cosmic, evil motherfucker for everything it's done. But just one more thing though Bishop. What happens here once we're gone? I mean that thing has corrupted so many and caused so much damage. Plus, once the mission is over, how do we get back?"

Bishop raises a hand again, but this time in reassurance adding "Now that Abraxas has fled your world, his influence will fade accordingly, Scott. England, over time will recover and rebuild. Coming to their own conclusions of what transpired here, the way the human race mostly does when faced with events they can't explain with there own logic and reasoning. As for getting back...Well we'll have to cross that bridge when we get to it. Now, let's get moving shall we?"

"I guess so" Scott replies, walking over and standing next to Bishop, who with a hand gesture throws forth a vast blue cosmic energy ball several feet in front of them ,which spreads as if hitting a wall forming a portal or wormhole of somekind. It crackles with a bright white electricity, lighting up their surroundings. Scott takes out the small crucifix he wears under his armor on a chain around his neck that his mother gave him and kisses it. He says a quick prayer in his head and then re-tucks it away.
He then turns to Bishop with a forced smile of readiness "I'm ready, old man."

To which Bishop smiles back "Good luck Scott, and remember...I'll be watching over you."

Scott then runs at the portal and leaps into it. All his senses go numb as he feels that every molecule in his body is being pulled in every direction at the same time. All he sees is white. His last thought before that? 'Yeah...I'm so royally fucked!'

Authors notes :

Next in chapter 1...

Location : Eden prime 2183 prothean beacon...

I've made Scott and Ross's powers linked and Scott is going to be de-powered throughout the story for a good reason, as i only plan on having them face each other twice in the whole story. . So that Scott can interact with the main ME1 story on an equal level and also with the crew showing his weaknesses and vulnerabilities as a human still and not steal Shepard's, or the rest of the crew's thunder because at the end of the day its Shepard who is the Hero of this universe after all. So there you go people. That's the start of Mass intervention. I know the prologue was very long for an introduction but i wanted to get all that info out so you know the backbone of Scott's mission...Review are greatly welcomed.