The Conversion Bureau: Rip and Tear

by aegishailstorm

Rating: teen
Tags: Human, Gore, My Little Pony: Friendship is Magic, Dark, Other, Thriller, Adventure, Violence, Crossover, Death
Length: 7496

Against all the magic that Equestria can conjure... All the wickedness that mankind can produce...We will send unto them... only you...Rip and Tear...until it is done.

For millennia, a mysterious figure of terrifying power has persisted across the plains of hell, bringing with him death and distruction. A beacon of good, of light, and of cold revenge. He is known by many names across the cosmos, the destroyer, the slayer, The doom marine. His original name has long since been forgotten, he is known to most simply as the Doomslayer. He once saved the earth from the demonic clutches of hell, this mysterious being now finds himself on a very different version of earth, with its own invaders...

(A Doom Eternal/ Conversion bureau crossover)

Published 2021-11-23 21:50:00 UTC
Last updated 2021-11-28 02:03:17 UTC

At Equestria's gate

Date: 2077 January 3 0950 hours EST

HLF Facility, Undisclosed location, Atlantic coast.

"This is Dr. Taylor Richardson, log entry 003, January 3rd, 2077. Subject analysis of, the "Slayer" as my colleges refer to him as has proven unsuccessful, we are unable to get close enough to preform meaningful tests, the small amount of data we were able to gather from our field agents amounts to this, the subject is in no way Equestrian, he is male with a genome that makes him him very much a member the human race... I, a as contributing member of the scientific community cannot agree with the assumption by some of my colleges that he is for lack of a better word.. a god. An avenging angel, the right hand of doom here to save humanity from its misfortunes and sins... But I cannot ignore... That the timing of his arrival... The identity of his enemies... The magical element to this catastrophe we currently find find ourselves in has...Well... It has definitely shaken my scientific resolve... Maybe he represents humankind's rage? Their will to persevere, to overcome that which would threaten our survival...He is uncompromising... A relentless being of violence that knows no mention of the fear or hesitation shown by our many leaders and politicians during our time of judgement. The only thing they fear... Is him...He...He cut through them... like...like a sickle through a field... his fury surpassing their own so called
"Magic of friendship" He is faster... More relentless... I believe him now to be more than just a man... He is... Doom.

48 hours earlier...

High above Earth, a massive construct floated above the world, the fortress of doom, home to the Slayer himself. He now gazed down over the world, looking out over its smog filled skies and dead oceans and irradiated wastelands with disappointment. Was this what humanity had chosen to do with it's world? His gaze shifted to a massive shining purple bubble, expanding across the pacific ocean. Vega opened up the castles comm channel's, allowing transmissions from the planet below to reach him. He wondered how his castle had been brought here, the once demon infested world that he had gazed out on had disappeared in aa flash of light, now replaced by, whatever this was.

"You may want to hear this." Said Vega.

"Casualties range in the billions..." Said one news channel.

"The Princesses of Equestria have been nothing but kind, remember, Salvation is only a cup away!"

"Equestria continues its approach, consuming more of our world by the day..." Said another. Vega turned though many civilian and military channels alike, allowing The Slayer to discover the horror of what had been going on down there.

"Fall back, now!"

"They're converting everyone!"

"That thing isn't stopping!"

"What...What happened to you?!"

"Neigh!"

"They're breaking in!"

"Run!!!"

"Nothing's working!"

"Please don't resist, It'll all be over soon!"

"There ain't a way in hell I'm going out like this!"

The Slayer's rage began to grow inside of him, he felt no demonic presence on this world, yet something equally as destructive seemed to be occurring, and it seemed as though that strange glowing, expanding bubble of energy was the source of it.

Samuel Hayden began talking.

"I believe I have discovered the cause behind this." He played over a brief history of what had happened since Equestria had appeared, the devastation of the human world prior, the 3 day war, the opening of the conversion bureau's, the effects of magic on the human body, and the formation of various extremists groups.

"I see you are quite enraged."

"Agreed, we cannot sit idly by as this world is destroyed... by sentient equines of all things.. why the mere though of it is... laughable."

"Calm yourself Dr. Hayden, there is a particular transmission which I believe that you would be interested in." Vega pulled up the live hypernet feed from the world government headquarters in the city of new York.

"A terrorist organization known as the PER, or Poinifcation of Earth for humanities Rebirth, has recently launched an assault on the headquarters of the world government. They have dispatched response teams, but they're severely outnumbered, if
they succeed, what remains of human society will collapse, along with the remainder of all military' forces."
The Doomslayer turned back to gaze down at the planet. He gave a sight nod of affirmation.

"Setting the portal coordinates now." The Slayer calmly walked over to his desk, opened it up, and reached in, drawing a fresh shotgun from it, and grabbing a handful fresh shells, loading them in one by one. As he did, the call's over the radio got more and more desperate.

"To anyone, if you're out there, please, please, send help." He looked into his portable pocket dimension, where the remainder of his arsenal lay. Ready to be brought to bare at a moments notice. He walked over to the other side of of the room, grabbing his helmet off the desk, and sliding it over his head, watching for the literal millionth time as its head's up display activated, he looked down at his left arm gauntlet, and extended its blade, feeling the edge to ensure it was still sharp. He turned and walked towards the podium, were the portal lay, He stood and watched as the ancient engraved metal plates slid away, revealing steps. An archway extended above them, glowing bright with a blue aura. From it emerged a swirling blue vortex.

He sighed as he stood before the portal. These may not have been the usual demons he spent his time massacring, but in a way, they were. After his own earth had been shattered by the forces of hell so, so long ago. He had taken a silent oath, to end the threat of hell, once and for all, to get revenge for all they had taken from him. But most importantly of all, to defend humanity. As he walked forward, a final transmission rang out over the comm system.

"P-PLEASE HELP US!!!!!" He growled in anger, racked his shotgun, and stepped though the portal.

Author's Note

Here's some nice, befitting music: At Doom's Gate- Mick gordon

A different kind of hell on earth

The Doomslayer emerged on the other side of the portal shotgun raised, immediately he smelled the faint sent of something he had not in millennia... grape. He looked around, see that he was in an alleyway of sorts overlooking the shoreline. He could hear the distant sound of screaming and gunfire. He sprinted out of the alleyway, and turned the corner and ran down he street, he found himself overlooking a large open pavilion leading up to a large building.

"That's the Headquarters of the World government." Said Vega over the Slayers comm's. Of course the emergence of someone as blatantly obvious and heavily armed as the slayer did not go unnoticed, he was spotted by security cameras as soon as he exited the other side of his portal. He looked down into the open pavilion, on the far side he could see a massive approaching cloud of purple gas. On the other were a panicked group of civilian humans running the oppose direction, covering their retreat was a handful of soldier clad in all black armor. The appeared to be firing into the cloud.

"Those, are what are known as the Blackmesh. So called for their distinct black nanosuit armor, they're the World government's primary form of law enforcement, they also make up the majority of the world's military forces." The slayer watched as the cloud made contact with a few of the retreating humans, upon being swallowed by it they appeared to fall to the ground unconscious, the Slayer watched as they slowly began to change into multi colored ponies.

"That, is ponification gas, weaponized ponification serum used by the PER to devastating effect."Dr. Hayden said to him. He continued watching as vials of the serum flew out of the cloud, and hit more humans, causing them to change as well. Figures began to emerge from the cloud, more of those same so called "Ponies" They were shouting for the remaining humans to give up.

Enraged, the slayer ran into the pavilion as fast as he could. He charged into the the cloud of ponification gas, and looked for the first pony he could find. A red unicorn, ponification serum filled saddlebags at his side. Taking aim with his combat shotgun, he opened fire, the round was so powerful, it blew the unfortunate PER stallion in half before he could even turn to face the Slayer. He charged the remaining PER operatives. What followed next could only be described as a massacre.
He grabbed the next pony, smashing his head into the ground, he swung his shotgun over his shoulder, and fired a sticky grenade into a group of earth ponies. He dropped the dead pony, and rushed the others, direct impacting multiple of them with rounds from his combat shotgun, he looked up into the sky to see a group of pegasi flying over head. He switched over his heavy cannon, took aim at the pegsai, and blew them out of the sky. This all happened in the span of about 9 seconds. He looked back at the retreating crowd, now mostly gone, or converted, and sprinted back towards them. As he reached the edge of the crowd he noticed that he was taking fire from the Blackmesh, rounds were glancing off his armor. He ignored it and continued his approach. He came to a group of unconscious ponies lying on the group, one of them, a Pegasus mare. Raised her heads off the ground and looked around.

"W-What happened?" When she spotted the Doomslayer, she froze. The 2 of them locked gazes, and she dropped to the ground in fright. the Slayer momentarily stopped, and approached her. He leveled his Shotgun at her head, but stopped. He studied her carefully. This wasn't one of those PER operatives which was hell bent on destroying humanity, this was merely a poor bystander which had gotten caught in the crossfire. He could see the innocence in her eyes. He turned away without a single glance more and continued his approach towards the crowd. He left the cloud of purple fog, and looked around him. Most of the civilians had long since ran off. He was now surrounded by a group of Blackmesh soldiers.

"You, stay where you are!" They approached him, weapons drawn.

"I believe they intend to subdue you." Said Vega. The Slayer remained still. The group halted in a semicircle about 15 feet away from the Doomslayer. One of them stepped forward.

"Sir, my name is Lt. Mongomery of the Blackmesh, as much as we appreciate the help, we had it it under control, please come with us quietly and peacefully." The Doomslayer could see him reaching down into his belt, he drew what appeared to be a set of handcuffs. The others moved in on him. The Slayer turned and walked away. One of the soldiers made the mistake of grabbling him by the right arm. He turned around and looked at the blank expression of the Blackmesh's visor, who began to tremble in fear. Which was strange, because the Blackmesh were trained to not show fear. He felt one of the others attempt to grab his other arm, he swung his left arm around and peeled the Blackmesh's hand off him, raising him up into the air, he threw him across the pavilion, right into a stature, causing his suit to harden and his body to go limp, the others grabbed onto him. He in turn, grabbed them, and tossed them aside like ragdolls. The Blackmesh were used to going up against lightly armed resistance and militia groups, usually armed with antique weapons', their nanosuit armor was usually more than enough to absorb this. Rarely did they ever come across a threat which could match them in speed and endurance. It's not like knowledge of the Doomslayer and his capabilities would have helped them anyway. The Slayer threw them aside, and didn't even give them a second thought, he looked up at the massive government building before him. He turned back to see the assortment of soldiers, stumbling back to their feet. They began to make a secondary approach on him, but then something strange happened, they all stopped, and turned back to face the street in front of the building. He watched as more pegasi approached, followed by additional PER ground forces.

"It appears as though the PER have not quite given up yet. Additional Blackmesh support has arrived. It would be wise to not kill them." Said Dr. Hayden. The slayer ran past the Blackmesh, into the fray of approaching ponies and ponification gas, paying no regard to the Blackmesh's cries of "Cease and desist!" All the while, the Worldcorp security officers were observing the whole thing from the safety of their offices deep with the world government headquarters, simultaneously amazed and horrified at the same time. They looked on in disbelief. Never before had they seen someone.. or something fight this with ferocity, or speed. Not even the Blackmesh, or what they had seen of the Equestrians, could match this... thing. A few of them even cheered him on, completely oblivious of his true goals.

World Corp Complex

The Slayer looked up a the grey skyline of new York city, dropping the last dead PER operative at his feet. He turned back to gaze at the dozens of Blackmesh, now taking up defensive positions around the complex. He began walking towards them.
It was just now that he realized the state of the world he now found himself, streets covered with garbage and sludge, and skies choked with smog. It didn't matter to him, earth was still earth, even if it did bring back memories of hell. All the while, the Blackmesh continued to try and stop him, all of their efforts proving unsuccessful of course. All the while, this fight was being broadcast over the hypernet to every corner of the globe, millions watched on in amazement as this mysterious figure completely disregarded their attempts to apprehend him, they, for the first time ever, felt a strange sense of hopefulness emerge from within them, for decades they had watched helplessly as the earth fell more and more into disrepair, when Equestria had appeared, they believed their only options were to become one of them, or die. Yet something about this figure, the way he fought, the was he stood in the face of those odds, made them think that it could be diffrent. The HLF, or human liberation front, also watched the triumphant scene unfold, they were already hatching their own plans for how they could use him.

"Look at him! The way he took down those PER agents, and the Blackmesh. He could be a valuable asset!"

"Calm yourselves, for all we know he could be just as much a danger to us as to those fucking Equestrians! For the time being, I would advise we keep our distance, until we can learn more about who, or what he is."

"Alright."

The Slayer continued his approach, until he stood right at the gates of the world government headquarters.

"Perhaps now would be a good time to reveal our intentions, Dr. Hayden?"

"I agree Vega."

"Greeting world government personnel, my name is Vega, the figure you see standing before you is known as the Doomslayer, as he is incapable of speaking, I will do so on his behalf, we would like to speak with your leaders. A murmur arose from the security personnel within the base, finally after about 5 minutes of waiting, a holographic projection appeared in fort of the Slayer.

"Greetings Doomslayer, speak you demands." The Slayer stood, unmoving.

"We have none, your world is in major need of repair, we understand that the land of Equestria has been the cause of many of your strife's, has it not?"

"On the contrary, Equestria has been nothing but kind, they allow us into their borders freely, and without judgment. Do you perhaps belong to some special off shoot of the human liberation front? Your tactics seem to match theirs." This angered the Slayer, being compared to terrorists, of all things, it almost reminded him of those UAC cultists back on his previous version of earth. Luckily, Dr. Hayden spoke up again before things got violent.

"The man you see standing before you is not of this world, the insignia he bares, is one of tragedy and suffering, he, and the things he has done are beyond your comprehension, you would do wise to not interfere with his exploits again. "

"I see..." Responded the hologram. The Blackmesh began to approach him again.

"Perhaps now would be the time for an exit, our true fight lies elsewhere."

"One moment, if we are to continue, I will require a better understanding of the way this world operates, I will require a hypernet terminal, I have marked the nearest for you on your HUD." The Slayer nodded in approval, and with one large kick, knocked down the reinforced titanium gates of the world headquarters, revealing the lobby inside, the people inside began to flee in terror.

"Do not be alarmed, we simply require something before we depart." This statement did nothing to calm the terrified civilians inside the complex, and they continued running in terror. The Slayer Inserted Vega's chip into one of the Hypernet access points, it took less than half a second for Vega to find the information they needed, the Slayer snapped his chip back into place, and ran back outside, ignoring the Blackmesh, still trying to use conventional firearms on him. A swirling vortex appeared in the center of the pavilion, the Slayer entered though it. It closed behind him, leaving the soldiers and security personnel alone, confused as to what had just happened. One of the frightened politicians spoke up across the PA system.

"Send out a broadcast on the hypernet, this... thing is not to be engaged, at all costs! Is that understood!?"

The Slayer emerged from the other side of the portal back aboard the fortress of doom, wiping away the blood and debris from his mission. He immediately began to prepare for the next one. Vega spoke up.

"Now that the world government headquarters is no longer in danger of being overrun, I believe we should turn our attention to attention to this "PER" Using data collected from the hypernet, I have been able to determine the location of their headquarters, located in the city of Quebec."

"Your proverbial mail box is full. I believe you would like to hear a few of them." What he heard was almost enough to bring tears to his eyes. They were thanking him. Urging him on. A few weren't even human, a handful were from those ponies whose lives he spared, giving their thanks for sparing their lives and for giving them hope that wasn't in the form of magic, or wings for once. From what he could tell, most didn't even know why, they just seemed to have a gut feeling that he was there to save them. Just as plentiful were those who wanted him to be hunted down, to be brought to so called "Justice" For his atrocities. The next transmission was a warning from the world government.

"To all civilians, while it is clear that the being encountered earlier at the world government headquarters is indeed an enemy of the PER, and of Equestria, it is still unknown weather he is a threat to civilians. Please, for your own sakes, keep your distance from him. As of now, he is to be considered an enemy of the state." He couldn't believe this, he had just saved them, and now they had marked him as a wanted criminal, it was partially understandable, given how vague and violent his arrival had been. Growling in anger as the transmission ended, he turned back to the portal, no reset for Quebec, he walked through it, shotgun raised.

PER Quebec

The Doomslayer emerged on the other side of the portal, this time, he found himself in an enormous dirt lot, surrounded by the ruins of what had once been the city of Quebec, Canada. Vega spoke up.

"The PER originally had their main headquarters located in Saskatchewan, but were forced to move on account of increased resistance from the HLF. The Slayer nodded, and began his making his way into the city at a "Light jog" if 20 miles per hour could be considered "light" He rounded the corner, and in the distance, he spotted a massive, open facility, and an assortment of residential and and industrial buildings, all located beyond a massive concrete wall. Surrounded by guard towers.

"I believe that, is what you are looking for." He charged down the road, drawing his rocket launcher and taking aim at the tower closest to him. Firing off a single rocket, the guards didn't even have time to react, the high explosive round hit the first tower, sending it toppling to the ground and killing the 3 ponies within it, he took aim at the wall, and fired a second shot, blowing though it. Swapping over to heavy cannon, he charged inside, where he was met with with the remainder of the PER ground forces, who barely had time time to turn their weapons to face the Slayer before he was already upon them, he opened fire as soon as they were in sight. They returned fire with a combination of small arms fire, and ponification darts. All of which bounced off the Slayers armor, he jumped into their lines, drawing his wrist blade, he grabbed the first pony, crushing its skull, and impaling he others with his blade, he dropped them, switching over to his super shotgun, he turned the corner, blasting another one straight in the face with 2 barrels of argent buckshot as he did, splattering, he then came across the human elements of the PER, one of them fired a shotgun straight at the Slayer's exposed arm, but to his unfortunate surprise, the slug bounced right of the skin, leaving a small bruise in its place, the slayer approached him, slamming a pair of fresh shells into his super shotgun, the PER agent dropped his weapon and fled in terror. He didn't get far, as a bolt from the Slayers plasma rifle melted him like an ice cream sundae. He tore into the first building, and what he found inside angered him even more, an assortment of humans, held in prison cells, waiting to be ponified. He tore off the cell doors, one by one, and pointed at the hole which he had made in the side of the building. Most of them went without question, eager to escape, however, some stayed where they were, those who genuinely though that they could make a better life for themselves in Equestria, or simply where to scared to leave, fearing that that the enormous being which now stood in front of them would kill them if they tried to leave, the Slayer simply turned around, and left them, he wasn't going to force them after all, one of them stopped, and looked up at him.

"Thank you sir, you have no idea how much I appreciate this, the Slayer was already running away, hunting for more PER agents to kill.

Unfortunately, as fate would have it, the head leadership of the PER was on site that day for a meeting, and they now watched the security cameras in horror as the Doomslayer unraveled all they had work so hard to achieve.

"W-What do we do!?" Asked one of them.

"That... thing, is destroying everything! Nothing's stopping it! Not bullets, not magic, not Poinification serum, nothing!"

"Calm down, we may yet find his weakness."

"Don't you see? HE doesn't have one, didn't you see the hypernet broadcast last night!? You can't run from him, you can't hide from him, nothing! The only thing that we can do is get on our hooves and beg for him to not tear them off and feed them to us!"

"We could go to Equestria, nothing human made can enter it, right?" Asked another one, nervously sweating.

"Did you see that way he fights!? I'm pretty sure he isn't even human!"

"Well alright." All the while, the Slayer continued annihilating the PER forces, he kicked though the reinforced doors of facility at the center of the complex, where Vega had informed him the leaders or the PER resided. And ran down the corridors blowing away what ponies and humans still attempted to put up something resembling a fight. He eventually came to the core of the facility, he smashed though the doors. And found himself in what appeared to be a large open stadium, reminding him of his time on Sentinel prime. Where he had been forced to fight for survival against other competitors, and later, against a terrifying monster known as the Gladiator. from the other side emerged 4 ponies, 2 pegasi, and 2 unicorns. All of them unarmed. The Slayer watched calmly as they approached him. To his confusion, they sat down in front of him, silently.

"They appear to be surrendering." Said Dr. Hayden.

"Do not trust them, the PER are well known for using tricks." Vega spoke aloud.

"Tell me, what is it that you want?" The AI asked the 4 ponies.

"Why, only to be allowed to leave this place peacefully and unharmed. " One of the pegasi said to him, trying to keep his fear under control. The Doomslayer noticed that one of the unicorns, the only equestrian native of the group, was charging his horn. And lunged forward at him, as did the others. The Slayer grabbed the unicorn by the horn, staring him in the eye.
Right before crushing his horn. and dropping him on the ground, the other 3 came rushing to meet their friend, still in shock. They watched as the Slayer absorbed the magical energy through his armor. His fist began to glow bright red. The Slayer let out a blood punch, sending a wave of pure argent energy across the 4 unfortunate ponies. He turned away. A blue portal appeared, and without a second thought, he stepped through the portal. Leaving the ruins of the PER headquarters in his wake.

San Francisco wastes

The Slayer reemerged back on his castle, high above the earth, to find it dark.

"She has taken control of the Fortress's systems, I am no longer in contro-" Dr. Hayden was cut off when a bright white figure appeared in the center of the room. The being seemed to radiate energy, filling the room with a warm white mist. It spoke in a tone reminiscent of a being he had met once before... The Kahn Mayker.

"Greetings human, my name is princess Celestia, I have watched you work, and while I do appreciate you putting those genocidal psychopaths at the PER in their place, I'm afraid the time has come to put an end to yo-" She was cut off when the Slayer raised his super shotgun and emptied both barrels at her, unfortunately, she teleported away before the rounds were able to make contact with her.

"She drained the majority of the fortress's power, it will take time to recharge." The Slayer looked down at the still expanding bubble of energy on the earths surface. Vega understood what he was thinking.

"I see, setting the portal coordinates for the edge of the Equestria/Earth barrier, magical interference prevents us from teleporting directly into Equestria." The Slayer nodded, he turned back around, and walked back trough the portal.

Dr. Roselyn Pastern was busy at work within the San Francisco conversion bureau, awaiting the arrival of a new case of Ponification serum, little could she had known when she had set out for work that morning, that what she would see that day would change her life.

The Doomslayer arrived on the other side of the portal, stepping out onto the ruins of the San Francisco bridge, stopping for a moment to take in the dreaded sights. Wrecked cars and other vehicles of ages long past littered the road. The water below the bridge was murky and brown , the air was choked with smog. In the distance, just off the shore, he could see the vague outline of the shimmering wall of magical energy that was the universe barrier between Earth, and Equestria. He ran down the bridge, towards the San Francisco peninsula. As he began to enter the city, he could hear noises coming from the ruins, he raised his heavy cannon, but otherwise continued towards the barrier. As he entered deeper into the city, they increased. He soon came to the first signs of civilization, makeshift buildings, hundreds of them, constructed from a mixture of sheet metal and plascrete. Among them where humans, thousands of them, seemingly going about their lives, mixed in with them where more of those "Ponies" Living together in poverty. The Slayer let out a low growl this angered him, that others, The so called" Good families." As Vega had explained earlier lived their lives in luxury, far away from suffering, while they left their common citizenry suffer. In his mind, they were no better than those UAC scumbags he had dealt with long ago. He felt sympathy for them, ponies and humans alike . As he made his way across the peninsula, he noticed that people where staring at him, murmuring to each other. He increased his pace.

Dr. Roselyn Pastern stared out her window, looking the window of her small office, below she could hear what sounded like... cheering? A call came through the intercom, the Bureau's receptionist, Bethany, was on the other end.

"Hey doc, come down here, you gotta see this!" She looked out her office window she could hardly believe her eyes. Crossing the old campus where the Bureau's as located, was a figure she had seen earlier on the holonet. "The Slayer" As he had become popularly referred to after his halting of a massive PER offensive on the world governments headquarters. Had become an overnight sensation worldwide. Clad in green and brown armor, and clutching a massive firearm in his hands. He crossed the campus at a speed that shouldn't have been possible on foot. Disappearing into the ruins.

"Where do you think he's going?" Asked one of her colleges. She stared off towards the ocean.

"Probably Equestria. "

"But that's suicide! No human can travel beyond the barrier!"

"It doesn't look like he cares. Besides, did you see the way he fought in New York? My guess is that he's headed for Equestria."

"Wait, you don't think he's-"

"Yep, he's after the princesses."

"He can't kill them right?... Right?" Dr. Roselyn looked at her partner, and sighed.

"What are we going to do about it? Call the Blackmesh?"

"Well, looks like they're already here." Her college pointed down at the street, a squad of Blackmesh chased after him. A second call came though the intercom. The Conversion Serum has arrived.

"Well, that's me." She made her way downstairs, but instead of the Blackmesh solders, carrying along a case of Conversion serum, she was instead met with a group of men in black armor,She knew who they were as soon as she saw them.
"HLF!!!"
They pushed her aside and walked into the bureau, guns raised, she continued screaming as loud as she could, hoping someone would hear her.

The Doomslayer ran across the peninsula, completely ignoring the pursuing Blackmesh, when he heard a massive explosion echo out behind him, he looked back to see a column of smoke rising into the smog filled sky. He changed course and headed back, passing by the Blackmesh, who turned and followed as well. He found where the explosion had originated, The enormous white building which he had passed by earlier, a massive smoldering hole now lay in its side, he could hear the sounds of screaming and gunfire from inside, he raised his heavy cannon and charged inside. The Blackmesh stopped for a moment, and watched him.

The Slayer remerged from the smoking wreckage, carrying... a disembodied head. He dropped it on the ground in front of the Blackmesh, and continued on his way. One of the soldiers looked down, and scanned it. It was the leader of the HLF himself. Who had decided to lead a suicide mission into the bureau, hoping to kill as many ponies as possible before he was gunned down. Unfortunately, it had not been the bureau security personnel who had found him, nor the Blackmesh. But the Doomslayer. Who had come crashing through the walls of the Bureau, the operatives hadn't even had time to react. The Slayer had gunned them down in one go, splattering blood over the walls of the bureau. When he came across their leader, he stopped for a moment, lowering his heavy cannon, only to draw his wrist blade, and sever the HLF leader's head in one stroke.

"Uh, command?"

"We see it, bring it in, and try to see if you can find the rest of the body."

"What about the Slayer?"

"Leave him. He's headed for Equestria, let him be. We have a tactical nuke on the way."

"Understood command." The Troopers headed into the remains of the bureau.

The Slayer was almost to the shore line, when he heard a whistling high above him.

"Brace yourself." Vega said to him. Just moments before a 2 kiloton nuclear device made contact with the ground, striking about 20 yards off to his right side. The residents of San Francisco watched the mushroom cloud blossomed in the distance.

The Slayer got up off the ground, stopping only to dust himself off. He looked though the searing heat and radiation, though it he could see a purple shimmer.

"That's what you're looking for." Said Dr. Hayden.

The Slayer switched over to his super shotgun, and charged towards the magical barrier.

Salvation of both worlds

The Slayer reached the waters edge, and stared at it for a moment before looking up at the barrier was still several miles off shore. He plunged in, and began swimming toward the barrier.

The Slayer's hand reached though the barrier and grabbed onto the expanding landmass on the other side. Pulling himself though. He got to his feet and looked around, he found himself in a forest. Dr. Hayden chimed in.

"I'm detecting a large collection of equine heat signatures to your direct front." The Doomslayer began making his way deeper into the forest. The forest gave way to a small town. The sign on its outskirts read "Springborough, Equestria."

"Perhaps you should introduce yourself. " Dr. Hayden suggested. The Slayer leisurely strolled into the town. As he entered, its residents collectively stopped to gaze at him in confusion, for all they new, what they were witnessing was impossible. One of them was brave enough to approach him.

"Uh, pardon me sir, do you need something?" The Slayer looked off into the distance, he could feel the magic energy of the being which had shut down his castle. He gave the newfoal a slight nod. And walked past the others, as he left town, he began to pick up speed. Going from a simple stroll to sprinting at top speed. To where, he did not know, only that where he was headed was the location of the being who had caused this world's suffering.

12 hours later...

The Slayer made his way deeper into Equestria. Crossing forests, scaling mountains, and gunning down resistance wherever it showed, which to say, was not often. He had come across many towns, most of which he had simply avoided. Eventually, he came within sight of a large mountain, protruding from its side was a city, sparkling white.
As he progressed closer to what Dr. Hayden and Vega had determined was Equestria's center.

"That, is Equestria's capital city, Canterlot,.home to their leadership, and the one they call Celestia, located within the castle on the far side of the city." That was all the Slayer needed to hear. He charged the mountain, jump boosting his way up to the city high above him.

When the Doomslayer arrived, he found the Royal guard, standing at the gates, blissfully unaware that he was there, when the caught sight of him however, their mood changed entirely. They began to uncontrollably panic, running away in fear, others dropped their weapons and threw themselves on the ground in front of the Slayer, begging for mercy. He didn't understand, how was it possible that this race was able to do so much damage to earth, and humanity?" He ran though the city shotgun raised, jumping over vendors and buildings. Until he stood a the gates of the Royal castle. The gaurdsponies there were just as desperate to get away from the Slayer as he tore apart the gates, and strolled into the gardens.

"Sister!" Luna came rushing into the throne room. "There is a human in the castle!"

"Oh really now? Let him through."

"But-"

"Don't give me that tone Luna, tell the guards to stand down."

"Well... That's the thing, they sort of abandoned their positions and fled as soon as they spotted him."

"Hmmm..." Luna gave her sister a look of, "I'm genuinely fear of my life." And sat down next to her. She didn't even notice the subtle red glow growing in her sisters eyes.

The Doomslayer entered the castle, still not having encountered any real resistance.

"This is most unusual, this is their capital city, they should've put up more of a fight. Remain vigilant. " The Slayer continued down the now empty hallways of the royal castle. He made it to a pair of massive doors. He could practically feel the magical energies behind it. He Kicked them down and rushed in. Within he found Celestia and Luna, siting on their thrones.

"Greetings Slayer." He continued walking towards her, slowly.

"My name is Celestia, and this is my sister Luna, we know why you are here, I myself have watched you work, I know that you desire for humanity to be freed of it's so called suffering. We had every intention of doing that, you see...Our worlds collided roughly one year ago, I saw the state that humanity was living in, I decided to help them, to give them an opportunity" The Doomslayer watched as her lips began to quiver. He could practically smell the deceit radiating off of her, yet he could also feel something else. An ancient presence, not unlike the one which he constantly felt looming over him while in hell, it was clear to him, that the words coming out of this beings mouth were not their own, that this "Celestia" Was fighting a battle in her own mind, and she was losing.

"So, do we have a d-" She stopped talking entirely, and stumbled for a moment, when she got to her full height, Both the Doomslayer, and Luna watched as her glowing blood red eyes turned a deep purple, the lower portion of her body began to dissolve into glowing mist. Her screaming was replaced by booming laughter and deep growling.

"Sister, what are you doing?" Luna asked, backing away.

"SILENCE!!!" The being cried out, Luna cupped her hooves her ears and dropped to the ground in pain. The being turned to face the Slayer. He knew now that this wasn't some magical equine, but something far more ancient and malevolent. It began to float above the ground, he raised his shotgun and, without hesitation, blasted the creature in the face. It had not expected such a sudden reaction and was knocked back by the blast, it rose back to full height, and its horn began to glow. A bolt of energy flew from its horn, making contact with the Slayer's chest, sending him flying through the walls of the castle, down into the streets below. Ponies gathered around the crater where the Slayer had hit the ground in confusion and wonder. Their looks of wonder where soon replaced by ones of terror as a bright white mist arose from the royal castle, shadowing over them all. It let out another laugh.

"WHO ARE YOU, A MORTAL, TO INTERFERE WITH MY PLANS!?" The Doomslayer rose out of the hole, and stared the creature right between is glowing eyes, his entire body began to glow a dim red. He ignited his crucible and charged the being. Jumping the castle walls in one large bound and scaling his way up to one of the castles many balconies. He jumped, and, with both hands, brought the crucible down on the being's ethereal head. Watching as its argent blade tore it open, it let out one last demonic screech, before crashing to the castle grounds far below. The 2 of them hit the ground. The mist around Celestia's body began to dissipate, as did the hole in her head. Leaving her body, unconscious , but intact, lying on the ground. The Slayer approached her.

When Luna finally came to, she looked around for her sister, instead, she found the throne room in ruins, a giant hole lay in it's side, she shakily got to her hooves and peered out it. She could see the ominous form of the human she had encountered earlier, towering over her sister's body. Frantically, she flew down to meet them. Landing just a few feet away.

"Please, don't kill her!" She pleaded with the Slayer. He stood there, unmoving, looking down at the body of Celestia. Suddenly, she awoke. Looking up at the Slayer.

"I-I'm sorry." Was her first response. Luna looked at her sister with confusion.

"What do you mean?"

"Well... It's kind of hard to explain, but these last few months, I haven't quite been myself, it all started the moment Equestria appeared on this world. It's like something in my head just snapped. Something emerged from it, something ancient, older than me. I've been fighting with it since. But when he arrived, it began to get stronger, and when he entered the throne room, it won. I can't thank you enough for saving me." The Slayer looked down at her, staring deep into her eyes, he knew for a fact that she was telling the truth. That none of the things that this world faced where not her fault, at least, not directly. He gave her a slow nod of affirmation and began to walk away. Celestia said one more thing to him.

"I swear on my life to put an end to the pain and suffering which that... Thing forced me to do." He walked off into the distance. The Slayer knew that she would hold true to her promise.

World Goverment Brodcast

Date: 2077, January 3rd, Worldcorp public hypernet broadcast

"Over the past 48 hours, our world has been fundamentally changed, 48 hours ago, we were hopeless to stop our own fate, of Either become Equestian, or perish at the mercy of an unknown power. This however, is no longer the case. In a series of attacks across the north American continent, A mysterious being known only as the "Slayer" Brought down the head leadership of the PER, also known as the "Ponification of Earth for humanities Rebirth". And the HLF, also known as the "Human Liberation Front" In addition, the barrier, the bubble of energy separating our world from that of Equestria has stopped expanding. And more strangely still, the Equestrian government has issued a formal apology. Stating that the creation of the barrier was entirely an accident, and, that while conversion bureau's will still remain open for those at want it. They have pledged themselves to helping repair the ecological damage of our own world. Weather or not this is the result of Slayer, or something else has yet to be determined. If you're out there Slayer, on behalf of all humanity, the world government would like to thank you for what you have done."

End broadcast.

The Doomslayer arrived back on his castle, to find it once again in working order. In his left hand he was holding something he had not experienced in millennia, an ice cream cone.

"Back from your vacation?" Asked Dr. Hayden. The Slayer nodded.

"You will be happy to know that your services are no longer required on this world, would you perhaps like to remain here a bit longer?" The Slayer was already headed down to the castle's ripatourium to get his daily fix of demon killing.

"I take that as a yes."