Niko: Any last words?

Riku looked at the time before smirking.

Riku: Time's Up.

Niko: WHAT?!!

*BAM*

???: IMAGE BREAKER!!!!

A fist came connecting to Niko's cheek sending him tumbling to the ground.

*CRACK*

*SHATTER*

Niko: *Pain* FUUUUUUCK!!!

Mikoto: That's for my classmates, you bastard!!!

Mikoto Yukimura back and ready to battle!

....

Riku remembers the time when he was young. People always underestimated him for his analysis quirk.

Due to a fact that it isn't a flashy quirk.

People believe he can never be a hero.

They told him he's better off being someone's sidekick.

Yes. He gets it.

Flashy quirks are cool and all.

But there's more to being a hero by just having a flashy quirk.

He remembers how his father, who was an scientist that studying the biology of quirks told him everything he needed to know.

Father: Remember Riku. Having a emitter-type quirk isn't all there is to being a hero. Sure, having a powerful quirks that allows heroes to create and control a miniature super-nova power. But they need to understand what they can use with that power for both offensive and defensive purposes.

Riku: So...even though I don't have a flashy quirk. I can still be a hero?

Father: Of course. Your quirk is very special. Since the day it was bestowed upon you. Analysis grants you the ability to gain a detailed understanding of the personality, but also learn about others people quirks, traits, and weaknesses of anyone.

Riku looked amazed as his father tells him so many graphic details of his quirk.

Father: So you're gonna be a great hero. Which is why I'm gonna apply you to UA by recommendation to help reach your dream.

Riku: Wow...Thanks Dad!

That day, Riku had out his quirk to use...allows the user to gain even more minute details about a person the more words read about them.

So Riku begins studying at a young age.

He became so familiar with every accurately specifics detailnavout everyone he meets and knows.

Every quirk.

Every drawbacks.

Every strength.

Every weakness.

That why when Riku had read into Niko, the more knowledge he gained about him.

Which is why he brought down Niko's defenses.

By giving Mikoto enough time to get back at the shadow slasher.

Riku: Being the truest heroes are those  who willing to risk everything to save people, and they do it out of a pure heart, not for money or for fame. It's because...They simply want to help. That is something worthy of great admiration. Being courageous. Preventing disaster...which is why I've did my absolute hardest to bring this oppressor to justice... wouldn't you agree, Mikoto?

Mikoto: Yeah...it's thanks to your stunt. I know now how to defeat Niko. Thank you Riku. You'll become a great hero!

After praising Riku for his hard work.
Mikoto, who looks at Niko, whom gets up from the dirt on the ground. The shadow slasher wipes the blood from his mouth.

Niko used his shadow minions to attack Mikoto but the snow user creates a snow wall to block their path & froze them on the spot.

Mikoto: Those tricks of yours are becoming old!

Niko: I'm getting real tired of all of you ruining my fun.

Mikoto: Your fun involves killing people. I won't let things end like this. 

Mikoto let's out a deep breath.

This fight ends today!

Mikoto jumps into the air and transforms into his "God" Form.

Niko tried using his claws but like what happened beforehand, Mikoto used a blizzard of light quirks straight into the claws causing them to dissolved.

Mikoto: Using the same attacks again. That must mean you're running out of options.

Niko didn't answer him as he prepared a explosion of dark attacks that almost seem similar to Bakugo's quirk.

*BOOM*

Mikoto dodges the attacks with ease...

Niko: How are you taking those hits without getting injured or dying?

Mikoto: Not to sound arrogant but I've gained an ability to resistence towards most of your attacks. They won't work on me anymore.

Niko gritted his teeth before he tried using Arun's quirk to control Mikoto but the snow user was not within range causing him to lose focus which gives Mikoto the advantage to continues his onslaught. 

Niko gets blasted after multiple powerful snow attacks sends him back.

Niko growls before he used all of his dark energy attacks which gain gives Mikoto the advantage as he used the light illuminated from him to evacuate from the shadows claws.

Mikoto: You won't win this fight.

Mikoto promises Niko that everyone in the world is plotting his downfall due to the pain he influenced upon his victims.

Niko guffaws at his words because he believes he installs so much fear in the world that no one would dare hurt him...

Niko slashes at Mikoto as he runs at him avoiding most slash marks him up with a ice freezing punch. Mikoto attacks followed by Niko's punch which caused another explosion.

Once it dissolve, Mikoto makes an declaration at him.

Mikoto: I WILL SAVE TSUME FROM YOU!!!

Niko: Oh sorry Mikochan ! But Tsume is gone. Six feet under where you and your stupid friends belong! NYAHAHAHA!!!

Mikoto made a anxious look before regaining some courage to continue fighting.

He won't lose Tsume.

He won't lose him.

He won't lose to the darkness.

Niko: I will be the who will win in the end...after all. You're too late hero. My darkness has already spread around your world.

Niko begin showing off his Hell by revealing the agonized looks of humans. 

Niko: Humans allow themselves to become mad with power. This world is ruled by something not human. Know the conscience to reform crimes...

Shadows of apparitions have form in different areas. 

Causing massive chaos. 

People around the world begin to start acting strange. 

They started clutching their heads, before turning into shadows. 

"AHHHHHHHHHH!!!!"

Most begin to immediately attack on sight.

Reports from cities had shown the shadow people forming. 

It's Installed The Fear Global Worldwide!

Mikoto: Riku! What kind of quirk is that?!

Riku begin analyses the quirk that Niko was using.

Riku: Madness In The Moment...Another stolen quirk. It's a transformation quirk that allows converts the users sanity into power.

Mikoto: (Shit...How did Niko get ahold of such a quirk like that?!)

Riku: When the quirk activates, it will choose a target to destroy and then their mind shuts off. It transforms the victims into a physical monstrosity that is ten times stronger than most people are and will attack with a blind rage!!!

At that moment, Mikoto realized this dangerous quirk will not only destroy the sanity of people. They will not know whose friend from foe. It gives Niko the ability to drive humanity insane!!!

Riku had listed the orders.

• Forceful Self-Harm: The ability to make other hurt, themselves without them wanting to.

• Fear: The power to steer fear into the hearts and minds of others.

• Fear Manipulation: The monstrous ability to manipulate fear in anyone, so long as Niko has control.

• Forceful Suicide: The power to make one commit suicide against their own will.

• Insanity Absorption: The power to absorb insanity, giving Niko energy while he had the ability to empower someone with insanity.

Once again...The World Of Quirks Was Doomed...

Because It Was The Quirk Singularity Theory All Again!!!

Niko: Face it Hero! You think you can beat me now that you're oh so powerful?! Forget it! As long as madness lies in humans hearts. People love being negative! They all love to hate!!! If someone is exposed to negativity or constant criticism early on in their lives, they may mirror that behavior!

Mikoto:...

Niko: Think about it. If children were raised in an environment where criticism, pessimism, doom and gloom, and negativity are pretty common in them. They will end up having that morphed into their developing pea sized brains as typical behavior. They learned from their parents, their schoolmates, etc, and mirror their actions. So because of this, they will continue to hurt others as they please! Their negativity makes me powerful!

Mikoto bit his tongue knowing how true those words were...

Niko: It's over Mikochan. I already proven you can't save everyone. You lost...

Mikoto:.....

Niko: Show me that despairful look on your face again! I wanna see it~~~!!! SHOW ME!!!!

Heh.

Heh Heh.

Niko:....Eh?

Mikoto was laughing?

Niko: What's so funny? Have you finally gone insane?

Mikoto: I know I can't be able to stop your corruption. But I know someone else who can...

Niko: What?!

Mikoto: Now!!!

On cue, a certain UA student appears onto the battle with a blue guitar!

Jack: HEY DUDES!!! Let's Get This Party Started!

A/N: Humanity's Savior Is Jack?!!