Izumi threw the first punch, coming in fast and hard. She'd let the muscle mass fade into her normal fist, because she didn't need it anymore. Not after the boost she'd just gotten.
Srijan barely reacted in time, ducking under the powerful strike. It shot over the villain and he wasted no time forming claws and digging them into Izumi's side. She didn't even flinch, turning her arm into a blade and cutting the arm off near the wrist, absorbing the claws into her while her foot came up and she kicked the villain back.
He flipped onto his feet, barely steadying himself from the strike as he let out a cry of pain, rushing in for another strike with his other claws. He completely missed as Izumi dropped down onto one hand, twisting her body fast and kicking Srijan's feet out from under him before she rose up rapidly, throwing forward a fist right into his stomach.
A shockwave erupted as it hit true, causing the villainous shapeshifter to rocket off towards the shipwreck zone with speed. He crashed straight through the fountain in the middle of the central plaza, slowing him down slightly. It was just enough for him to flip around and start recovering in the air as Izumi rocketed off after him.
He landed at the last moment atop one of the two large remains of the yacht previously decimated by Itsuka, shaking his head and looking up with a scowl only to see nothing.
"BEHIND YOU!"
He barely had time to turn before Izumi's foot, shifted to have small sharp claws at the end struck true into the top of his head, sending him under as blood exploded from the point of impact.
Srijan's neck changed suddenly, gills forming to allow him to breathe as he massively reduced his mass to get around easier. The surface exploded into an open pocket of air as the pissed off teenager came in, trying to strike his head.
The older shapeshifter managed to move out the way thanks to the water and her mass slowing Izumi down, as his feet shifted into one big tail. His arm changed to something almost akin to a harpoon, made of flesh and bone, a blade at the end shooting out on a cord of large sinew.
It hit true, tearing through the young vigilante's stomach and pulling her back to the villain as his jaw shifted to one much bigger and filled with hundreds of sharp teeth as chomped straight through Izumi's arm, absorbing it as he did so.
He was quickly distracted however when he felt the teenager hanging onto his back with her free hand, letting go suddenly as claws formed and his tail was suddenly ripped off.
Izumi was left behind in the water as she absorbed the tail, immediately making up for her lost limb that reformed. She then began swimming forward at terrifying speed, her feet shifting into massive flippers as large amounts of biomass was expelled from behind, propelling her straight into Srijan.
Somewhat desperately, he grabbed her by the chest and used his own muscle mass ability, striking Izumi with all his power, managing to open a pocket of air to make the strike all the more powerful.
The green haired girl's eyes went wide briefly as she was catapulted out of the water, which exploded skywards in a glorious spectacle as she quickly righted herself, her entire body shifting and regenerating back to normal.
The world changed to a dark blue all around her as one bright red mass moved beneath the water, letting her track the villain. She gritted her teeth, throwing her arms forward so that many tendrils exploded forward, grabbing the front half of the broken sinking Yacht and pulling it up to her, into her grasp.
She grabbed the bottom of it, twisting it around like it was as light as a feather. The world faded back to normal and Srijan exploded out the water coming at her, whereupon she threw the boat with all her might.
It shot forward at speeds likely incomprehensible to any normal human as the very front edge of the watercraft tore straight through her opponent, causing him to explode into violent red chunks.
Almost as soon as he was turned to paste though, the pieces started to reform as Izumi shot out two tendrils into the now exposed bottom of the lake, using it to pull herself back to the ground faster.
Still, Srijan reformed first and managed to jump behind her at the last possible second, grabbing her from behind and using his strength to launch her as high as he could before he jumped with all his might off the yacht, causing it to explode into pieces as he came up, fist hitting izumi in the stomach and sending her through the roof of the entire facility.
He wasn't done yet, following after her only to find empty sky.
Izumi came in from behind, wings now having sprouted from her back and she drop kicked him as he turned to see her, being knocked through the air only to flip around and land on the roof, sprinting forward and trying to leap at her.
She intercepted him as her wings disappeared and they began a battle of fists and tendrils in the air, constantly staying connected to one another. Were anyone to be watching from the ground, all they would see were several massive shockwaves being created in the sky, seemingly at random.
Still, it eventually came to an end as Izumi got the upper hand and delivered a horizontal spinning kick that created the biggest shockwave yet, tearing a brand new hole in the roof of the USJ a moment later as Srijan crashed right into the Storm Zone, the younger shapeshifter hot on his heels.
She landed atop one of the buildings only to be immediately greeted with an uppercut from 'Toxin', knocking her into the air before it was immediately followed by a gut punch that threw her off the building.
She readjusted herself as she was falling, only to see Srijan had followed and delivered a follow up kick to her gut that sent her flying backwards, crashing through the walls of the building at the end of the street right out the other side.
Before the villain could hope to make a forth strike however she righted herself quickly, massively increasing her body's mass so she would drop to the ground faster, where she let herself slide back on the soles of her feet, ignoring how the rubber screamed. She could just form more if they got too damaged.
Her arms started swirling violently with tendrils as her fists bulked up into massive size, into something akin to two massive clubs. She saw Srijan coming and let him get in close before she used her full speed to get to his side before he could even react, smashing both her massive fists into the ground hard.
Shockwaves erupted as tremors began from the impact, the concrete all around cracking and breaking as the dirt began to pile up in one big trail of direct destruction that swept the older shapeshifter away.
Izumi followed after him, sliding beneath him and letting one of her hands turn back to normal to grab his leg, pulling him down into a quick jab that stunned him while he was still in the air before she twisted around and battered him full force with her other still transformed fist, sending him crashing out the wall of the Storm Zone towards the entrance.
Izumi followed, using flesh grenades to keep the man wrapped up very briefly as she followed him over her classmates so he could do nothing to them, pleased to see it seemed Thirteen and the students were all still okay as they waited for the teachers, Aizawa having gone on ahead with Kendou.
They barely had time to register the two shapeshifters flying overhead as Izumi delivered a flying kick to Srijans chest, that made sure he'd continue on into the ruins area where she appeared seconds later, sliding down one of the toppled buildings and jumping into the street.
Srijan had only just absorbed the tendrils that had exploded from the flesh grenades and held him, shaking his head and pushing himself up in the street. "Well… that Nomu certainly did you a world of good. How did It feel? Finally, not denying yourself, consuming another? How does the power feel?"
"Shut up." Izumi growled, walking slowly towards him. "I know exactly where you're going with this but guess what? I'm not like you, I have this thing called 'being a decent fucking human being'. An odd concept to a hell spawn like yourself, I'm sure."
"Your jabs are far from as piercing as your claws." Srijan chuckled, as his arms started to swirl with red tendrils. "You're right though. You're not like me, you're too much of a coward to embrace yourself. You have one with you, but now Izumi, let me end you with the flesh of everyone you ever failed to save from me."
The villain raised his hands high, aiming them right at the girl with a manic glee in his eyes.
"What did you call this? Oh yes… DEVASTATOR: CRITICAL PAIN!"
Millions of tightly packed, dense and powerful tendrils came flying right at Izumi who stood her ground. Her ultimate move used against her with the flesh and blood of every victim she'd never managed to save from Srijan?
She didn't know what he thought that would do to her, but she knew it just pissed her off. As it came in to strike, she lifted her hand and backhanded the entire attack out of her way, tearing it off from its point of origin and sending it careening into the sky.
"It's Final Devastator, genius. And you call that a finishing move?" Izumi asked before she leapt and grabbed the entire mass, absorbing it and coming down, landing on the ground. "Let me tell you what's really happening. Everyone you've ever killed will get their revenge now. DEVASTATOR: GROUNDSPIKE GRAVEYARD!"
She formed her claws and pushed them deep into the ground in an instant, all the mass coursing through her, into her arms and out her claws before, just a moment later, the entire street exploded as hundreds of massive powerful claws rose out the ground and even some burst out the walls, tearing Srijan to pieces and destroying some of the ruins.
They all disappeared and a few buildings crumbled. Before Izumi could even breathe, she had the displeasure of seeing Srijan form again, clearly struggling at this point though. He began to laugh to himself.
"Bet you think you're some pure freakin' angel or something." The villain coughed to himself, standing up and glaring at her as he started running in to begin the brawl anew. "That's what you think you are using them to fight me, huh!? Giving the dead some closure or something?"
Izumi intercepted his next blow, grabbing both his arms. "Hardly. I know I'm no angel, but I'm not a demon like you either!"
She started spinning as fast as she could, before letting go of the man and launching him off towards the next zone, the Landslide Zone. She ran after him, jumping and zipping around debris before she landed on a pillar of ice as Srijan began to shoot out his claws like projectiles at her.
She dodged without effort, gaining on him. "I've broken the law, but I did it to help people! I've hurt people to save others and If I have to, I'll end you here and now like I did with Nomu Srijan, to save everyone else!"
She finally reached him, forming a shield on one arm to defend against his claws as her other turned into a blade she used to cleave his body in two. "If I'm anything… I'm a Dark Angel."
Srijan suddenly head-butted her, making her stumble back as his legs reformed and he absorbed his old pair of legs, stumbling back as he formed a blade of his own. "Dramatic much?"
He came in for a strike, which Izumi blocked readily with her own sword, throwing his arm down and bashing his face with a shield. As it turned out however, it seemed that was the older shapeshifters plan as he flipped over her back with his non transformed hand, slicing through both her arms with his blade before he kicked her up the landslide onto a patch of ice she slid up. 'Guess Todoroki was here…'
She stood, not having time to properly reform her arms as Srijan came upon her, swinging at her wildly, forcing her to have to dodge and regenerate at the same time.
As soon as her arms did reform however, she wasted no time clapping her hands together on the blade and tearing it clean off, absorbing it as Srijan retreated down the landslide, grabbing her dropped body parts on the way for himself.
Suddenly, five different chunks of flesh shot off him and Izumi's eyes widened as they formed into more Srijans, all of whom rushed her suddenly.
"Well then-" One brought their knee right into her stomach.
"-How do you feel-" Another clone brought an elbow down on her head
"-About this trick-" A third kicked her with all their might, managing to make her lift off the ground as the last two clones jumped after her.
"-We developed just for you, Izumi!" The fourth clone called as he grabbed her by the fabric of her costume at the chest, head-butting her and letting the final clone use a muscle mass fist to punch her violently back into the ground where a crater formed as she bounced off the ground.
"Fun right?" The fifth clone chuckled as he landed next to her, all the clones quickly swarming her as the original Srijan chuckled and caught his breath.
"We're a part of a hive mind. They still share my original mind, our thoughts and feelings are one and we're perfectly in sync. You may be able to fight me off when it's one on one, but how do you fair against five of us? Let's find out!" The original explained as she watched and began to heal and recover. A moment to breathe and generate more biomass for him to combat the teenager.
Izumi started getting thrown around like a kickball at first, tendrils grabbing her and swinging her around, feet colliding with her stomach and fists throwing her to the very top of the landslide where she finally had enough, grabbing two of the clones that came for her where upon she crushed their fists entirely and absorbed their whole bodies into her far easier than she could the normal Srijan.
She chuckled as she watched the remaining clones go wide eyed and she stood up, cracking her neck. "It's a good trick. I have to give you that, might start using it myself in future. You have to sacrifice some of your biomass to make them though, meaning for every clone made, the weaker all of you are overall. At our level against normal people? Negligible. You need to work harder than that if you want to beat me though Srijan."
The final three clones all tried to rush her and she smirked, getting into a fighting stance. "Oh, and you're not the only one who knows how to experiment with your powers."
As the three fists all came in to strike, the green haired girl seemingly disappeared, as though she'd teleported away. However, a second glance had one of the clones going wide eyed, as they saw a tiny speck running up their arm at incredible speed.
Izumi leapt off the first clone's arm with enough force that it tore clean off while she came up, in a vertical spinning kick that drilled straight through the head of the clone as she absorbed all of it's biomass with ease, getting bigger.
She jumped off the lost solid bit remaining of the first clone to the second, landing right on its nose. "I decrease my size to as small as can be, while increasing my mass as much as possible at the same time exponentially."
She struck the clone's head with a single punch, causing it to explode as the body fell over, being absorbed again by the girl as she grew even bigger, landing on the ground now barely five inches tall.
The final clone ran at her, trying to come down on her with claws she easily weaved between, flipping around onto her hands and pushing down into the ground for a moment, her body crumpling like a spring before she shot forward fast enough there was a sound like a gunshot as she tore through the chest of the clone.
"I'm nearly impossible to see or catch, too slippery and agile to catch…"
Despite the tiny hole her body should have made at best, the chest of the clone was decimated entirely as she grew back in size to her normal height, turning to run and absorb the final clone only to be beaten to it by Srijan.
Still running, she came in for a punch he blocked just in time with a shield, being forced back on the soles of his feet while Izumi grinned in triumph. "All the while, thanks to the mass being stored in such a tiny area, even my most basic strikes are made into moves of pure devastation."
"Clever." Srijan admitted begrudgingly as he kicked her back, coming in for another basic claw strike Izumi was now able to just hold her arm up against with the amount of Biomass flowing through her. "Not clever enough though."
Suddenly his claws changed into a muscle mass fist that grabbed a hold of her arm, tearing it off and absorbing it, giving him an opportunity to send her flying backwards with a kick to the chest.
She started crashing through branches and leaves and some point and eventually fell to the ground, rolling over and adjusting herself, barely having time to block another incoming strike, flipping back into a handspring to jump onto her feet, seeing they had ended up in the forest area between the Landslide Zone and the Mountain zone.
Wasting no time on anymore conversation she grabbed and uprooted the closest and biggest tree next to her as Srijan got in closer, smacking him hard in the face towards the mountain area. She threw the tree like a projectile to distract and stun him while her arm shifted yet again.
This time it turned full red like blood as it formed into something akin to miniature arm cannon she raised up as the inside filled with as much sticky biomass as she could possibly form, shooting out with enough force to make arm recoil after a moment right as Srijan shattered the tree into pieces.
The fired off Biomass hit true, sticking around the villain like a cocoon that held him to the wall of the mountain. It wouldn't stop him forever but it was dense and sticky enough that it would take a few moments before he'd be able to absorb it all.
She looked up to the struggling shapeshifter with a small grin. "Hey Srijan, I just realized I haven't tested out my new full speed yet, need a test dummy who can take a hit. You want take that position?"
For his part, Srijan just let out an aggravated scream.
"Perfect! Stay right there!" Izumi called, turning and sprinting through the forest, finding the clearest path she could use as she quickly got all the way to the other side with the speed she was used to using. 'Alright, now to see just how fast I really am!'
With that thought, she rocketed forward fast enough the ground tore open beneath her feet as her starting point. She weaves between tree's like a pro, getting close to the other end of the forest in what was less than a second as air began whipping all past her face, into an almost cone-like shape… and then…
BOOM!
A sonic boom erupted, the lights all around the USJ exploding as a result.
Izumi jumped off the ground, flying right at Srijan and delivering an insanely powerful drop kick to the villain's chest. The younger shapeshifter felt the intense recoil run through her from the impact, before the mountainside tore open and her older counterpart went flying all the way through the dirt and rock, eventually crashing through the surface up top where Izumi followed, already waiting for him with her speed where upon she delivered a spinning kick into his head, landing on the ground before him and springing off her hand into another kick into the man's stomach before she finished with two tendrils grabbing his feet, yanking him back down to her and punching him across the mountainside, sending him crashing through another wall of rock.
"Midoriya?!" Jirou's shocked voice caught the green haired girl's attention and she turned to see the purple haired girl and Yaoyoruzu who was having some… interesting wardrobe problems fighting off a few thugs while Kaminari wondered around with a dumb look, giving everything a thumbs up.
The vigilante grinned, rapidly appearing behind the thugs and knocking them out, before she then did a scan of the whole mountain in less than a few seconds, tying them all up and flipping in front of the trio.
"Hey guys. You all okay?" she asked, getting nods. "Great. I think I got all the thugs. Take Kaminari and get to the entrance."
Suddenly, Srijan came in again and Izumi wasted no time delivering a rapid roundhouse kick to stun the villain.
"Huh? What about you?!" Momo asked, clearly conflicted. Izumi just gave her a thumbs up and a smirk.
"Me? Oh I'll be fine." She saw Srijan coming back in again. "He's barely made me need to try this whole fight."
"OH YEAH, YOU BITCH?! WELL THEN LET'S SEE HOW YOUR ATTITUDE HOLDS UP IN THE NEXT FEW SECONDS!" Srijan snapped, aggravated as two muscle mass fists hit the green haired student head on and sent her flying, before another fist landed on her stomach and made her hit against the rocky floor of the mountain.
She was suddenly thrown and saw Srijan above her. "One last zone, brat! Fire zone! Let's see you get all playful now!"
He came in for a final drop kick, only for Izumi to grab his legs and twist around in the air, throwing him straight down with as much force as possible causing the dome that protected the fire area to shatter open.
She dropped down after him, as she gave herself as much mass as she could, flipping around into a position to land on her feet as she dropped into the zone onto the roof of one of the buildings where Srijan had landed.
The force of her impact reverberated throughout the building, causing the windows on every floor to shatter as its very foundations were rocked. The sudden oxygen rushing all throughout the building caused a massive explosion of fire, trapping the two shapeshifters in an arena on the roof, surrounded by their shared weakness.
"You want to know what I think, Srijan? I think this was potentially your stupidest idea yet." Izumi said, coming forward with no holds barred, claws forming as she tore his leg straight out from under him, absorbing it and turning. He tried to reform it but before he could Izumi stuck a claw straight through his chest and lifted him overhead, throwing him to the flames.
Srijan recovered at the last moment, flipping around and wrapping a tendril around her neck, pulling her to him and grabbing her. They both ended up sticking to the wall near one of the windows, trading fists and blocks until Izumi had enough and stomped the wall hard enough to open a hole into the main floor.
They both dropped into the office but the villain managed to make his way behind the vigilante suddenly, grabbing her from under the arms and trying to force her head down into the flames.
Izumi just snarled as her entire body swirled and was suddenly coated head to toe in a heavy exoskeleton armor as she elbowed Srijan in the stomach and swiped his feet out from under him.
"What the-"
"This is why I said it was a stupid idea. I had time to think about our weakness and how to counteract. Sure, if the flames got hot enough this still wouldn't do anything to save me… but these flames aren't hot enough to get past my armor." Izumi said, stalking towards her prey who came in for another muscle mass strike that she intercepted with ease, stomping on the villain's foot and punching his head off his body.
Before he could form a new head, Izumi grabbed a hold of the body tight in a bone crushing hug that was hardly friendly, as she absorbed all of Srijan into her.
She let her armor drop as she turned to the head, the last remaining part of the man that was beginning to reform a body.
She stomped on the tendril that would have made a neck, and grabbed him, running to the nearest fire and sticking him in.
"What the, what are you- AHH! ARRRGGGHHHH! FUCK! MIDORIYARRGGGHHH!"
Izumi flinched at the screams but didn't budge, even as her own hands burned. She flinched but the pain wasn't as bad as it once would have been with her new found power and it was probably unbearable for the villain.
She didn't like it, but as she had told him… She wasn't an angel.
She finally took him out after a moment and the screaming stopped, letting her look at the pained expression on the villains now massively melted face. She grunted, tearing out one of her arms and reforming it before she did the same to the other, absorbing her burned arms into her.
With that done, she finally turned to her long time pain in the ass and picked him up as he glared at her. "The other reason this was stupid. You gave me a perfect opportunity to stop you for good without having to off you. Good luck regenerating with all your exterior cells immolated."
"You… bitch…."
Izumi smirked before she ran out the building, twisting in the air and swinging out to safety, landing on top of the Fire Zone dome and looking out to the central plaza where she saw the last two villains barely managing to keep up with all that was happening around them.
Since she'd left, Kirishima and Todoroki had arrived to help All Might and after she left the Mountainside area, it seemed Yaoyorozu had gotten the same idea while Jirou had presumably taken Kaminari to safety.
Izumi wasted no time appearing in the middle of them all, dropping to her feet with Srijan's head tucked safely under her arm. She turned to Tomura and Kurogiri with a victorious smile.
"Final boss? Defeated. Secret final boss? Decimated." She said, cracking her neck. "All their power? Mine now. It's over villains, we win."