Once tomura had combined his mega forms the heroes were shocked but that wasn't the only thing bad happening on that flying fortress

(Power Loader=P.L)

P.L:EVERYONE KEEP UP THE GOOD WORK WE'RE GONNA KEEP THIS BAD BOY IN THE AIR AS LONG AS POSSIBLE UNTIL MIDORIYA OR URARAKA GETS HERE

All:YES SI-

Suddenly a loud pain filled scream sounded through the room as they all look to see mei breathing heavily and clutching her stomach

Mei:n-no not now...please not now!

Momo:mei what's wro- oh my god...POWER LOADER, CEMENTOSS SENSEI MEI MEI IS GOING INTO LABOR!!!

Everyone looks in horror as they realize she's in a dangerous situation

P.L:HOLD ON HATSUME

He rushes out of his area leaving a robot to take care of it as he rushes to her side

Mei:AGGH!

But this wasn't the worst thing to have happen of course as elsewhere shoto and iida looked on in shock

Touya:heh...hehehe....HAHAHAHA I KNEW IT THIS FEELS LIKE MY SECOND NATURE

Dabi has risen up like a phoenix from the ashes only this wasn't a normal rather horns began to grow out of his head and claws formed along his hands as a devil pointed tail revealed itself amongst the blue flames

Onima:AAAGGGHH....

Shoto:ONIMA!!!

Burnin:SHOTO GET BACK!

Touya:isn't that amazing little brother! I copied your Ninetales phosphor! And it's so amazing but looks like I got houndoom and it's mega as well Hahaha! I'll call this "HOUNDOOM HELLFIRE" OI SKEPTIC!!!

Skeptic would reply through a microphone on a nomu telling touya his plans and giving the location of where endeavor was at telling him that he'd do as he pleased and we return to tomura as he looked at his hands and his twin tails as he takes a breath and let's it out as he continues to stare at his hands

Jeanist:mega unification...

Mirio:'this is bad I may not be able to feel the aura he has but I can feel his animosity and it feels so much worse! Tomura shigaraki has become too dangerous!'

Rumi:RAAAH

Rumi begins to attack him as quickly and as hard as she can and mirio joins in the attack landing as many blows as possible

Aizawa:their attacks aren't doing anything...he looks so unfazed by this and we don't know how mega unification works at all...problem child never used this before

Monoma:it shouldn't matter! I'm still erasing his special moves so he can't crush anyone at all with his psychic powers or instantly kill anyone

Manual:he's right we could still have a chance

Aizawa:'just hold on longer'

As the remaining two keep attacking finally tomura has enough and speaks

Tomura:this is all your faults of course you gave us time to prepare and time to muster strength just like now I am living proof of that

Rumi:I'VE HEARD ENOUGH OF YOUR CRAP-

She rushes to attack but tomura turns and dodges before he lands a powerful blow

Rumi:!!!

She gets launched far and crashes into the rubble of the false U.A building as her eyes go blank

Tomura:that was it? A single punch is what knocks you out I pity you mirko don't worry though you'll be free soon

Mirio:MIRKO!

Tomura swings at mirio but the hero permeates through the ground right on time and tomura threw a rock slide at monoma making the heroes take cover from the rocks that flew at them once mirio came out tomura was immediately before him

Monoma:I lost my sight on him!

Aizawa:MIRIO!

Mirio:!!!

Tomura:I'm done with you

He readied a special move in order to attack but was met with energy pikes and claw covered tentacles rushing at him and landing but to no effect

Tomura:pests

Tamaki:m-mirio-

Tomura aims his finger at tamaki before blasting him

Mirio:!!! TAMAKI NOOO!

Nejire:TAMAKI!

Tomura then dug his hand into the ground and used rock tomb throwing giant rocks at her knocking her out of the sky before monoma got up as fast as he could and erased his special moves once again and mirio landed a punch on the villain's side not even making him budge

Tomura:look at how powerless you are now not even your strongest punch could bother me and you!

He looks to best jeanist's direction before rushing at him

Tomura:DON'T TRY AND FIX WHAT IS ALREADY BROKEN

Mirio:'He did that to tamaki and nejire I am so furious with myself I am too weak...sir nighteye...why did you have to leave us in order to help the world elsewhere we need you...I can't do this alone'

Nighteye:mirio you will become a finer hero than anyone ever will be

Mirio:'that feels like a lie now...I failed to protect anyone here...'

But suddenly a thought was sounded through their mind

Mandalay:'EVERYONE HOLD ON FOR 2 SECONDS WE NEED TO LIFT THE BARRIER FOR JUST THAT LONG'

Jeanist:what...wait hold on that's too long!

Mirio:'we won't last that long...it's all over... we're doomed...'

Suddenly he remembers what sir nighteye had said to him

Nighteye:mirio you must keep smiling because a society without humor

Tomura freezes in place as harsh winds blow against him and those in front of him as underneath the fortress

Mei:t-the AGGH a-alarm!

Momo:mei mei keep breathing don't force yourself to talk

P.L:come on come on kid! This is a very crucial moment!

Mei:ha I gotta

She grabs a wrench before throwing it with her remaining strength as it hits a button letting the field down for a split second

P.L:HATSUME WHAT ARE YOU DOING?!

Mei:that's why the baby wanted to come out...

They all look to a screen displaying the fight as they all see the one who had arrived

Mei:it's because...

Tomura:pfft what the hell why are you-

Izuku:Tomura Shigaraki...

Tomura:Izuku Midoriya...

Mei smiles as she sees izuku enter the field and with a much quieter tone but yet one full of determination and joy

Mei:your daddy...is here!

Mirio:MIDORIYA!

Aizawa:problem child made it!

Tomura:RAAAAH

Tomura turns ready to attack the new arrival but is quickly hit with an aura sphere as izuku lands into one of the pillars and blasts towards him at high speeds

Izuku:Blaze Kick

The sound of the impact screamed.like thunder across the sky as the barrier immediately raised back up this time the fighter who was meant to arrive had finally made it