Super Regeneration.

It was a quirk known to give it’s user astonishing vitality and make them almost unkillable. However, it takes some time to regenerate from injuries with the length of time depending on the damage done. The user can still die if enough damage is done fast enough or with enough strength. Current known owners are only Nemu.

Instant regeneration.

A quirk that supercedes super regeneration. Any injuries can be quickly healed or regenerated in a split second. While not truest instant, it can be considered just after an instant. As long as the head isn’t cut off, or the brain or heart destroyed, the user can regenerate an indefinite amount of times depending on their willpower. However, if enough damage is taken in a single moment or damage is done faster than the wounds can heal, the user can still die.

Current owners... Fujio

Yes, that’s right, it’s not that Fujio didn’t have a second quirk, but rather he was never injured so he just assumed that he never had a second quirk.

As Fujio grinned he thought

‘Should have known I had a quirk like this when my sword Qi had the immortal attribute. Instant regenertation falls into the branch of life, and the peak of life is immortality, it all makes sense now’

Meanwhile as Fujio was in pure bliss over his newly recognized quirk, All Might, the rest of the villains and his classmates were in pure shock at the sight of the bloody and beat Fujio gettingbup as if nothing happened and his arms instantly bending back into shape and mending themselves.

Most of his other classmates thought he was brought back from the dead but not All Might

’Young Fujio has 2 quirks?!?!’

All Might unlike everybody else, could see Fujio’s muscles and skin regenerate in an instant.

Coating his upper body with haki, Fujio with a hearty laught increased the gravity imposed on Nemu to 20x before charging at him

As Nemu’s legs sunk into the ground, it flexed its muscles and struggled to stand up before it was knocked back by a punch from Fujio

’Right now my haki has achieved quasi-full body colouring, which makes it stronger than my sword skills now that I used up my only strand of sword qi’

Fujio thought while attacking Nemu.

”W-what? Who is this monster? How can he deal with Nemu?” Tomura shrieked

Nemu’s eyes suddenly flashed before, as if not restrained by 20x gravity, attacking back

As the two exchanged countless blows, there was only one thought in the mind of the observers

”What monsters!”

BOOM!

As Nemu punched out, Fujio got knocked back 10 meters

’Still can’t handle the knock back of this be—“

Spurt.

Fujio spat out blood. Then felt as if a thousand knives were hacking his body before kneeling.

‘W-what? How did I get this injured? Don’t I have instant regeneration to help me’ Fujio thought

’O-ofcourse! Last night I cultivated a strand of sword Qi without any regard for myself, I must have acumulated some hidden injuries at the time. But fuck! Why did they have to act up now. Dammit all!’

As Fujio was constantly spirting our blood, Momo finally arrived.

’T-that’s Fujio. He’s injured I gotta help him’ Momo thought agitated losing her usual calm and rational mind

She quickly rushed to Fujio in an attempt to pull him away from the battlefield

”STOP! RUN!” Fujio shouted

He knew that while Momo’s quirk was good, she wasn’t strong enough at the moment to even stop a punch from Nemu. With enough practise maybe she could wield power as strong as the reality infinity stone, but right now she would be as weak as a chicken in front of Nemu.

But with resolute eyes and an unwavering heart she calmly stood in front of Fujio.

If he dies, I die. That was the mentality Momo had at the moment.

Just as she was prepared to face this alone, Bakugo, Todoroki, Midorya and all the others walked to her side

”We can’t let you have all the fun can we” Bakugo said with an evil grin

”You’ve done enough” Midorya said with resolution in his eyes

Todoroki just calmly stood their with determiniation in his eyes.

Fujio finally fainted, however it wasn’t in relief, but rather against his will, as he personally knew how strong Nemu is.

While his classmates were supporting him the scene was quickly brought down by Tomura

”Hehe, how nice protecting your injured classmate, what ‘heroes’” Tomura crazily chuckled

Then with a cold look he said

“Kill them all Nemu”

Nemu acknowledging the order rushed at them. As the class prepared to face the strongest opponent in their life, All Might finally stood up

”Have you asked for my permission villains?”

All Might said with an enraged expression before dashing towards the students.

Just as Nemu’s fist was about to hit Momo, who was at the front...

BOOM!

The sound of someone punching a wall appeared. As the smoke vanished, All Might’s Back appeared in front of the students. With his arms crossed in front of his chest he said

“I will give my best to protect these children. No, these hero’s”

Tomura finding pleasure at the thought of All Might being beat chuckled and said

”How will you protect them when your 100% isn’t enough to brat Nemu”

”If 100% isn’t enough then I’ll go beyond” All Might passionately responded

”PLUS ULTRA!”

As All Might shouted, smoke or rather steam started appearing from his body. Then like a madman without any regard for himself or his injuries, he rushed out at Nemu with his fist ready to punch out

As the got to Nemu, they immediately started exchanging blows, though it could be seen that All Might has the advantage as Nemu was continually being pushed back.

Along with this newfound wave of power, All Might was surpassing his limit while putting a massive strain on his body

100%

200%

900%

10000%

Infinite

He had surpassed his limits near infinite times during this small period of time.

“ DON’T. MESS. WITH. HEROS”

All Might shouted before finally delivering his final punch, launching Nemu into the air before jumping up himself and continuing to punch Nemu.

Nemu got knocked back so hard, he went through the ceiling and out of the practise area, whereabouts unknown.

All Might smoking heavily, fell to the ground powerless.

”ALL MIGHT!”

Midorya yelled rushing towards All Might, eyes wide open with snot running down his nose