Japan, Remnant City.

Home to Union Academy where students and teachers with Semblances, Quirks, Magic, Skills, and more are found here.

Leading this academy is several headmasters and headmistresses like Ozpin, Sirzech, Michael, Azazel, Nezu, Superman, Batman, Nick Fury, Ana Amari, Celestia, Luna, Cadance and Tsunade.

Among the teachers is a turtle called Master Oogway who is the legendary founder of Kung Fu. Both himself and his students came from China or more precisely Valley of Peace. Both Oogway and Master Shifu guide many students in one of the two combat class.

However Union Academy is only a connection between many heroes organization that formed throughout the world.

The Young Avengers.

The Justice League.

The Humane Seven.

Heroes Agencies.

The Furious Five and Dragon Warrior.

Huntresses and Hunters.

Etc.

Each organization protects a part of the world from serious threats. Yet all organizations share a same code: never kill a criminal, no matter how evil they are.

Thus the citizens of earth see Union Academy as a beacon of hope and were thankful for their protection.

However what many ain't aware is that even heroes hide dark secrets.

Hidden under Union Academy is a special dungeon where a young man called Y/N Kassidy who is a prisoner due to the fact his father is Cletus Kassidy.

He been kept locked up in that dungeon for three years since he join Union but once it reveal who his father was he was locked up in the dungeon.

He was beat up, punish, and even torture by Union so called Star Students. Even the teachers join on the torture for their amusement.

However no matter how much they torture him he never break which frustrated them.

But today there were no torture or anything as today it a festival for Union heroics which enrage the young man.

Y/N: "They dare to call themselves heroes after the bullsh_t they put me through?" He said with a venomous tone.

???: "Thus why they're nothing but fakes" a male voice spoke surprising Y/N as he look around to see who spoke.

Y/N: "Who's there?" He said not recognizing the voice.

Then out of nowhere appear a man wearing clothes unlike anything he have ever see.

Malevolenternatus: "Greetings Kassidy. I am Malevolenternatus and I want to help you have the vengeance you want" he said.

Y/N: "What exactly do you want as clearly you ain't doing this out of kindness" he said which Malevolenternatus smirk.

Malevolenternatus: "Simple. I want you to kill someone that hide in this universe but I'll tell you at a later date" he said.

Y/N: "Alright say I kill this someone in the future. How do I know you won't backstab me once I done as you ask?" he said which Malevolenternatus smirk.

Malevolenternatus: "Unlike Union I would never backstab someone who have potential of justice and vengeance" he said which Y/N thought then sigh.

Y/N: "Fine I kill this someone but that it as all I want is justice against corrupt heroes" he said.

Malevolenternatus: "That I need to hear" he said then stab Y/N with a injection that cause him to roar.

In the surface.

Currently everyone from Union and elsewhere is at the festival but not everyone is having fun.

The ones not having fun is Y/N friends and teachers that give a sh_t about him.

Po: "I can't believe that it been three years since Y/N was taken away" he said eating some food.

Twilight: "All because of who his father was which is bull since he never done anything wrong" she said.

Naruko: "Yeah. Why did those f_ckers think it alright to sent a innocent to prison" she said eating some ramen.

Jaune: "Those f_ckers only care about themselves then others" he said.

Nearby is the adults who is talking about their student Y/N.

Shifu: "I wish we could do something but without evidence to prove he didn't kill those five children we're stuck" he said.

Glynda: "I wish I could tell him how I feel before he was wrongful arrested" she said.

Winter: "Same" she said drinking away her sorrows.

Tracer: "I'll make those _ssholes pay" she said as both herself and her girlfriend are holding hands.

Suddenly a explosion caught everyone attention which they look only for many people to gasp.

For standing in front of Union entrance is Y/N Kassidy himself but he is pulsing energy unlike anything they have ever see.

Rias: "How did he escape!" She said completely surprise.

Bakugo: "Doesn't matter as that extra will suffer for escaping!" He said then attempt to use his quirk only for Y/N to dash then punch him into a building.

This completely surprise everyone as they never see Y/N so strong and fast before.

Then to their horror he roar and become a monster.

Ironwood: "Capture him!" He said then many Atlas soldiers attempt to attack but Y/N kill them horrifying everyone.

Ruby: "He just slaughter them like they were nothing" she said completely pale.

Cardin: "He still a freak" he said attempting to attack but his body froze confusing everyone until he scream with blood coming out of his eyes.

Carnage: "I am Carnage!" Y/N or rather Carnage said as Cardin was rip in half by some unknown force which horrifying his team.

Then Carnage grew wings which he use to fly away with such speed it have make Flash jaw drop.

Meanwhile on top of Union academy.

Standing on top of the academy is Malevolenternatus himself who smirk at the scene below him.

Malevolenternatus: "Let Carnage begin" he said then vanish.