In MHA with JJK powers.

All Might, Gran Torino, Endeavour, Best Jeanist, Miriko, Edgeshot, Hawks, Kamui Wood, Mt. Lady, Ryukyu, Gang Orca, Tiger, Pixie-Bob, Mandalay.....even Eraser Head.

Too many to count, many even hidden waiting for the perfect opportunity.

They all stood together, centered around All Might wearing a yellow colored suit.

Mechamaru couldn't help but look at their new dresses in interest, they all wore it, looking identical.

Like a group of yellow ducklings.

"Is that the source of your confidence?Heroes?"

His mechanical voice reached their ears.

"Mechanical Overlord...."

All Might clenched his fists, Taking a step forward.

"Today we will put an end to your reign of terror!"

Mechamaru was confused.

His reign of terror? When did it even start?

The only thing he remember doing was making a bunch of suits for fun and helping some people here and there.

He was being falsely accused here.

High in the sky, a media helicopter kept broadcasting everything live.

----

Ua dormitory.

All students of class 1-a kept staring intently at the TV screen.

The fight which could very well decide the future of Japan.

Was about to begin.

Everyone was sitting together holding their breaths.

Meanwhile Kurokai sat alone at the very back, being ignored by everyone because of the little stunt he pulled.

But it didn't matter much to him, since most of his attention was focused on controlling Mechamaru.

"It's beginning."

Todoroki said in a serious voice.

----

"Let's see how effective your little tricks are? Yes?"

Mechamaru raised his hands to form a sign.

At the same time, All Might, Gran Torino and Miriko lunged at him at amazing speed from three different angles.

They were fast.

Extremely fast.

Their combined attack was not something he could dodge.

But...

Since when did he had a need to doge?

Mechamaru's eyes turned blue.

And the very next moment.

Three powerfully attacks landed on limitless, the shockwaves strong enough to send those nearby flying.

"What the hell is this?"

Pro Hero Miriko shouted in a confused voice.

She couldn't understand why her attack did nothing to Mechamaru.

It obviously hit.

But he stood still as if nothing happened.

The same was true for All Might and Gran Torino.

"Retreat!"

All Might shouted, the failure of the attack was withing his expectations.

At the same time.

Mechamaru finished forming his sign.

"Allow me to show you the very pinnacle of quirk."

Miriko has just taken a step back when the world around her changed.

"Ultimate Technique: Coffin Of the Iron Mountain."

Turning to a world of flame, similar to the top of a live volcano.

For a moment, Miriko lost focused, looking at the otherworldly scene around her in confusion and wonder.

She was warned about it before, but witnessing it personally could not be compared with word of mouth.

Seeing the familiar scene, All Might stared at Mechamaru with a burning gaze.

In response, Mechamau simply looked at them and in the next moment their bodies were lit aflame.

But.

The expected sounds of their ear piercing shouts didn't came.

Instead, what greeted Mechamaru was a kick to his back which was blocked by limitless.

"Tsk again....."

Rabbit Hero Miriko clicked her tongue and quickly dodged the molten lava which spurted from the ground, agility making her way back to All Might.

Mecahamru silently looked at the three of them standing on molten surface with flames burning on their yellow protective suits.

It seems their preparations were quite....thorough.

Suddenly a flying figure quitely attacked from the sky.

Dragon Hero Ryukyu!

Her razor sharp claws going straight for his chest.

At the end moment, a wall of lava suddenly spurted from the ground making her stop in her track and hurridely move away.

Or atleast she tried to.

A mechamical palm suddenly came right through the lava wall and harshly grabbed her tail.

Hero Ryukyu's pupils constricted.

Just when Mechamaru was about to slam her straight on the ground, All Might appeared before them, but this time instead of hitting Mechamaru, he grabbed Dragon Hero Ryukyu and pulled her back forcefully freeing her from Mechamaru's grasp.

Mechamaru looked down at the yellow clothing in his hand which was used to protect Hero Ryukyu's tail, it was torn during the quick exchange just now.

Throwing it away, he looked at them in silence.

His green eyes staring unblinkingly at them.

Not far away from them.

At the very edge of the domain, some minor heroes along with Pro Hero Edgeshot and Best Jeanist stood together surrounding Eraser Head.

"Eraser how is it coming along? Have you blocked his quirk?"

Hero Best Jeanist asked, manipulating the yellow dress he was wearing to form a protective cover around them.

With his glowing red eyes staring straight at Mechamaru, Eraser said in confusion.

"My ability...It's not working?...."

"What?"

Hero Edgeshot asked in a loud voice, staring at Eraser Head with shaking eyes.

The others also turned to him.

Seeing their gazes, Eraser Head clenched his fists and said.

"My quirk, it's not showing any effect on him."

Eraser Head looked at Mechamaru who kept using his flame abilities even understand the influence of his quirk.

Hero Best Jeanist scrunted his brows.

"....then what do we do now?"

Hero Edgeshot asked in a hesitant voice.

Their original plan was to immobilized Mechamaru using Eraser Head, then swiftly capture him in one go.

But now you're telling them their ace in the hole was a dud?

"It never happened before? So why now?....", Eraser Head muttered in a confused voice.

Hero Best Jeanist glanced at him, then said to everyone.

"The original plan has changed, since Eraser's quirk is not working, then there's no longer any need for us to stay on the defense."

"Lets move together and join All Might in a frontal assaulted!"

----

Outside the domain.

Loud explosions kept ringing out in the sky.

"Endeavour!!!!"

With a crazy smile on his face, Dabi chased after Endeavour in his black metal suit.

Endeavour clenched his fist and punched straight at the laughing dabi.

"Ignited!"

Dabi showed no intention of backing down, with a blue flame covering his hand he intercepted Endeavour's fist head on.

The collision sent huge shockwaves flying everywhere.

On the ground Spinner and Magne were facing off against Hero Gang Orca, Tiger and Kamui Wood

And they were loosing.

"This is for Ragdoll you bastard!"

Hero Tiger shouted in a loud voice and punched straight at Spinner's sword sending him flying.

At the same time multiple Wood branches stretched out towards him to capture him.

Fortunately Magne used her quirk to change his direction and quickly brought him back.

At the same time she tried to use her ability on Kamui Wood and Tiger.

But in the next moment a supersonic wave hit her, buzzing her mind making her loose focus.

Toger didn't miss this opportunity and attacked straight at her.

Kamui Wood also sent his branches.

"It seems you are forgetting about me?"

A blue ball suddenly dropped between Tiger and Magne and in the next moment a nomu appeared before Tiger blocking his punch.

Mr. Compass who appeared beside Spinner and Magne smiled gently towards the heroes holding many blue balls between his fingers.

In the next moment various nomu's entered the battle.

Toga was going against Hawks.

But due to Hawks speed advantage, Toga was unable to do anything to him.

Hawk's feather blade slashed throigh Toga's back, making a metallic sound.

Of course Hawks was also helpless due to Toga's armour.

Seeing the metal claws coming at him, Hawks turned and easily dodged Toga's counterattack.

Creating some distance between them, he glanced discreetly at Endeavour's side.

Two pairs of different coloured flames kept flashing against each other.

It seems their stalemate was still ongoing.

Shigaraki turned the earth guardian which attacked him to dust, looking gloomy at Hero Pixie-Bob.

Her quirk, which manipulated earth, was a hard counter to him.

Suddenly several sleeping dart flew threw the air and attacked at Shigaraki's back.

Fortunately they were blocked by a black curtain which appeared in the nick of time.

Shigaraki turned the earth attack to dust, glanced at Kurogiri and shouted in anger angry voice.

"What the hell are you doing? Twice?"

He was suppose to be their hidden card!

But he has yet to see that bastard provide any support till now!

Inadvertently Shigaraki glanced at Twice's location.

But what he saw made him narrow his eyes.

Twice was captured, by Mt. Lady.

Shigaraki's eyes glowed eeriely seeing the smile Mt. Lady was giving him while holding the unconscious Twice in her hands.

With Twice out of battle, their battle strength decreased significantly.

"Kurogiri."

The black shadow behind him flickered.

"Release all the nomu's."

----

Inside the domain.

All Might punched at Mechamaru.

It was a light attack, since All Might knew it wouldnt do anything, mostly to grab his attention.

But for the first time in the battle, a surprisingly thing happened.

Mechamaru who has been unaffected by all of their attacks till now.

Actually raised his arms to intercept his move?

All Might's eyes flashed, feeling something different, he suddenly increased the strength of his blow at the last moment.

And then something surprising happened.

All Might's attack hit Mechamaru's crossed arms sending him flying.

'A chance?'

The same thought rang out through the minds of all heroes present.

And in the next moment, they moved at the same time.

But All Might was the fastest.

Not even giving Mechamaru a chance to land, he bombarded him with his crazy punches.

But this time, the change didn't happen.

His attacks once again became ineffective.

Through their close proximity Mechaamru's green eyes stared straight at All Might, looking eeriely calm.

In the next moment Mechamaru raised his arm, making a wall of lava surround him, forcing all heroes to back down.

"What happened?", Hero Best Jeanist asked All Might.

That previous attack definitely hit Mechamaru.

But then it suddenly became ineffective again.

What was the reason?

Was there a time limit? Or was there a limit to the number of moves he could take before a window for attack appears?

All Might shaked his head, showing he didn't know making the other heroes feel disappointed.

But still.

They all quickly regained focus, it seems the unmovable enemy did have some weakness.

They will just have to try again and again until the change occurs once more.

Surrounded by the wall of lava, Mechamaru looked down at his cracked mechanical arms.

This was the result of him blocking just one of All Might's casual attacks after he reinforced himself with cursed energy.

Looking at the falling metal pieces, Mechanaru said in a low voice.

"Don't disappointed me now...."

In a hopeful tone only he could hear.

"Mahoraga."

And in the next moment, as if responding to his wishes.

The golden wheel behind him trembled.

*Click*

Making a small turn.