Intro:

Its been a full year since y/ns unfortunate disappearance, and sadly the world of union still hasn't much changed, the corrupt society has only grown in both size and strengh

Many horrid examples of this are the slavery and abuse of the faunus

And speaking of, a truck was rushing down a road beside a mountain, this truck was also being pursued by a team of hero's in vehicles

There was a large combination of hero's in each of those cars, some even including hero's like best jeanist, kamui woods and crust

Above them where hunters and huntresses running after the cargo holder

Inside the van was a large group of faunus slaves who where recently trapped beneath the Schnee dust company, the origins of which weren't really clear but jacques was most likely using then for manual labor and to do most of the work for his organisation

But the hero's where under the impression that the villains had kidnapped a bunch if random faunus And are planning to use them for a ransom

Kamui woods: damn these villains! Of course they would capture innocent people for their own selfish goals!

Best jeanist: indeed, but we need to put put stop to their actions! Kamui, use your special move and ket the hunters move in!

Kamui woods nods and He unleashes his LAQUERED CHAIN PRISON to bind the car and to prevent it from moving any further which stopped it for a little while

Until...

??: haa!

Dabi burst out if the window and shot a large blast of blue flames at kamui, causing his wooden attacks to set ablaze and put kamui through extreme pain

Kamui woods: GRAAAAAAHHHH!!!!!!!!

Best jeanist: KAMUI!!!

he used his quirk to get a grip of dabis clothes, restraining the villain

Best jeanist: dabi huh? So it IS the League of Villains behind this!

Cementoss*radio*: try to throw him out of the car with your Quirk, that way we can detain him!

Jeanist was sbout to throw dabi, but all of a sudden he heard gunshots

*BANG*

*BANG*

only a few seconds after he heard the two shots his car began to swerve out of control, causing him to let go of dabi and his and kamuis car to crash to the side of the road, the two where greatly injured from the impact

Best jeanist: GAH!! w-what the hell was that!?

???: heh damn you "hero's" are a real let down!

Best jeanist looked up to see a girl standing on top of a street lamp, smirking at him

The woman had very dark red hair and her attire seemed to be that of lara croft from tomb raider, she also had two pistols strapped to the sides of her chest and a cigarette in her mouth

Best jeanist tried to use his quirk to grip into her clothing but she was faster and she shot him with both arms with her pistols

???: try to get into my clothes and your a fucking dead man, got it?

She spoke in both a cocky and a pissed off tone as she began to walk towards him, Best jeanist looked up at her weakly, qbout to pass out from blood loss

Best jeanist: w-who a-are you...?

???: names' revy

She then kicked him in the face, knocking him out

Revy: hmph, might as well but a bullet in his brain for good measure

She once again gets out her Pistol and shoots him in the head, killing the number 4 hero

(In this world endeavour never became the number 1 hero so Best jeanist is still number 4....or at least was)

She walks up the hill and sees the cars still chasing the cargo, she then puts her finger on a communication device in her ear

Revy: yo vali! you ready?

Vali*radio*: yep I'm in position

- back with the cargo -

Dabi was still getting some wires out of his face

Dabi: tch, these hero's won't let up

He turns to snake eyes who was driving

Snake eyes: (nods)

Dabi looks up to the sky

Dabi: and it looks like valis up next..

They both look up to see vali in the sky
With his devil wings out

Vali: hmph, might as well dispose of these heros

He actives who energy balls in his hands and tosses them down to the hero's chasing the truck

The Blasts hit one of the cars, causing them to slide, crash and burn like the others

Vali: tch, weak.. just like the others..

He flies down and lands on the roof of the truck, he looks to the side to see the group of hunters chasing them

He narrows his eyes and watches as one of them sends a wave of fire towards him, another having an ice like semblance and others having abilities consisting of wind, lightning and more

Vali extends his hand out and sends a wave of energy towards them

[DIVIDE]

a deep, echoing voice was heard and all of a sudden the huntresses' attacks faded and became less powerfull, allowing dabi to shoot another attack, completely overwhelming them, sending them crashing back

Vali: too predictable as always, and now there's only one left..

The final car was still chasing after the cargo, one of the heroes had a gun for a hand and he shot at the truck but it seemed to be Bullet proof

Vali: alright, Miles, itachi, esdeath.. your all next

Suddenly, miles morales, itachi uchiha and esdeath showed up ahead of the vehicles

Esdeath: I'll freeze the road behind the cargo

Itachi: I'll use the amaterasu to set the car ablaze

Miles: and I'll Web it up!

All three: GO!

esdeath jumps down and hangs onto the back of of truck, and then uses her power to freeze the road, causing the car to lose balance and Spin around uncontrollably, itachi jumps in and throws his kunai at the tires, popping them and causing the driver to further lose control

Itachi: AMATERASU

with that the car was consumed by black flames for a few seconds, making the driver scream in pain and lose control of the car

Miles then usess his venom punch, he launches up and shoots down, landing an attack on the concrete floor making it crack and crumble, this caused the car to be thrown into the air

He then took this opportunity to repeatedly Web up the car and stick it to the side of the mountain

Miles: phew that was a lot!

He said happily as he uses his webs to latch onto the car along with itachi

/timeskip/

Thr group where finally slowing down the truck and where taking a small break to rest

Miles: whoo! Thatw as crazy

Dabi: hmph, for you maybe

Vali: for me it was pretty easy

Revy: same here, all it took was three shots

Itachi: all you did was take out the tyres and shoot the hero while he was down, that doesn't compare kuch to the others

Revy: what'd you say bastard!? Want me to put a bullet up your head too!?

Itachi: you don't scare me girl..

Revy: you little!!-

Vali: that's enough, look up ahead

They all look in front of them to see Pro hero's, and hunters like

Endeavour and Winter schnee

Esdeath: now that could be a problem, I too may have ice powers but winters speed is kuch superior to mine..

Dabi: well my flames are stronger than endeavours so I don't have to worry there

???: no need guys.. I I'll them

They all turn to see their leader, standing behind them

Dabi: took ya long enough...y/n..

Y/n: well I'm here now ain't I?

Dabi: hmph

Vali: so you want to handle them on your own huh?

Y/n: yep, don't worry I'll end it with one attack, but as for you guys.. kurogiri.. now

Kurogiri*radio*: on it..

A large portal opened up in front of the truck, causing the cargo to go straight into it, but y/n opened a hatch in the roof and jumped out of it, backflipping over the portal and landing in front of the heroes

Endeavour glares at y/n, not knowing who he really is

Endeavour: hmph, so your the one behind this whole operation huh villain?

Y/n: I can assure that I am no villain, yet I'm not a hero either

Winter: then what exactly are you?

Y/n: just a man doing whats right.. by fixing this corrupt society we currently find ourselves in..

Endeavour: well you sure as he'll have a strange way of doing it, by kidnapping faunus, what even was your plan with them?!

Y/n: to rescue them from the corrupt man that was holding them captive..

Endeavour: liar!

He charges up his flames to an extent to where his body was no longer visible, only a huge amount of fire that took a somewhat humanoid shape

Endeavour: GRRAAAAA!!!!!!!!!

y/n: tch.... than don't say I didn't warn you...

He puts his arms together and began to say something

Y/n:
Kaaaaaaaaaaaaaaa..........

Meeeeeeeeeeeeeee...........

Haaaaaaaaaaaaaa.............

Meeeeeeeeeeeeeee..............

Endeavour: PROMINENCE BURN!!!!!!!!

y/n: HAAAAAAAAAAAAAAAAAAAA!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

The blast completely annihilated endeavours Prominence Burn

Endeavour: WHAT?!?!?!

pushing through and sending the entire group of heroes off the mountain

Endeavour: RAAAAAAAAAAAAHH!!!!!!!!

His screams faded as he fell from the mountain

Y/n stood above it all triumphant, behind his mask he was glaring at the sad excuses of heroes who where supposed to protect the community

Y/n: hmph... weak..

He walks through the portal and it finally closes

but he didn't know that Winter had just barely dodged the attack and is holding onto the side of the mountain, half of her uniform destroyed and she couldn't even open her left eye as she was completely bewildered by that incredible display of power

Winter then thought to herself, that voice.... it sounded familiar to her somehow...

-timeskip- (the next morning)

Location: Union home room

Everyone was sat in front of the TV displaying the events of last night

TV reporter: from the footage that was available, we where shown what seems to be the League of villains, or some other criminal organisation, kidnapping a group of faunus, many heroes such as Best jeanist, endeavour, kamui woods and cementoss where sent totry and stop the ongoing transport, but unfortunately the number 4 hero Best jeanist..was murdered, and along with that, all the other heroes who where stationed there had suffered severe injuries and kept near dead from the attacks, and our number 2 hero endeavour was also defeated along tib the rest, but what was most shocking of all, he was defeated by just ONE ATTACK
And endeavour is currently in critical condition and won't won't abke to continue hero work for abmnother couple weeks to a few months, and the villains on the other hand, one was identifies as DABI from the League of villains, others still remain to be new faces to the side of villainy, some possessing abilities such as ice manipulation, another seemingly being a member of the akatsuki organisation, and one seeming to be a high class devil with the abilities of a dragon, possibly being the terrorist devil VALI, and last but not least is the leader himself.. almost near to nothing is known about this individual from besides the fact that he possesses immeasurable powers strong enough to defeat endeavour with just a single blast he's he's pretty tall and well built figure with dark grey armour with a small purplish pink tint, snd a cape with a furr coat around the collar, and it seems from the sound of his voice he was a young adult or even a teenager from the way he sounded in the audio, unfortunately that'd all the information we have on him at this point, we'll update more on the story later later we have more to tell you all.. but name wise right now people have been calling him "the new all for one" or Mist commonly known as the destroyer of society...

"CATALYST"-

The TV was turned off by Izuku, he sat back down with with rest of the group

Ejiro: so... a new villain huh?

Jiro: yeah.. its crazy..

Izuku: I don't know if it's just me.. but something about that man feels... familiar?

Nejire: yes, something does seem like that to me Also..

Rias, issei and the others where sitting in their own area while still looking at the TV in which they had just turned back on

Kiba: that's some impressive power..

Xenovia: indeed, its strange for a teenager to wield such power..

Akeno: ara ara~ I would live for him do destroy me with that power of his~

Issei: pffft, whatever! I bet I could beat him easily!

Rias was still staring at the TV, pausing it on y/n

Rias*mind*: such power... able to take down the most powerful of heroes with just one attack...I must find this man and he WILL Join MY peerage.. whether he likes it or not.. then I will be the most powerful devil in all of union!

- with the headmaster's-

Ozpin was still drinking his coffee while watching the screen in front of him

Ozpin: how spectacular..for a being like that to exist.. and to defeat endeavour with such ease..

Sirzech: we must find him and get him to join union.. I can only imagine what we would be capable of with him on our side

Nezu: I must agree.. he could really help with the war against Salem and all for one, then we can keep everyone safe

Ironwood*mind*: I'm mainly interested with the fact that maybe we could harness those powers and make a whole line of atlas Super soldiers!

All might: so it's official then.. we will begin to hunt down this "catalyst" and get him to join us..

Nezu*mind*: but I'm afraid we may not be able to get his help, after all he kidnapped a group of faunus for some unknown reason.. but all I care about is keeping the innocent people of this world safe, including our students... I failed to protect y/n... so I'll make sure I do things properly this time.. I PROMISE

so y/n has returned under the vigilante name of: catalyst and is currently trying to fix this corrupt society, unfortunately the world may not see it that way.. but that won't stop him and his mission!

And not only that, but union now has its sights on him, but little do they know that they are in for a nasty shock..

TO BE CONTINUED.....

Post credits:

Underneath union city.. a soft rumbling could be heard

Deep beneath the centre of the city, an ancient Demon was resting and was about to awaken..

This was known as the 666 beast

TRIHEXA!!!!

And soon the beats would awaken from its slumber...