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English
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Part 5 of Mixing anime
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Published:
2026-06-05
Updated:
2026-06-11
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2/?
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The fall of the Shatter Knight

Summary:

The world was destroyed, not by fire, not by machines, but by an army of monsters. Everything happened after a boy named Izuku Midoriya was belittled and forced to restrain his powers for the ego of his former friend, then that friend took things too far.

Izuku lost any fucks to give and used his powers to the fullest, but everything wasn't perfect. Aizawa sabotaged him at every turn, then after the mid-terms first year, Aizawa expelled Midoriya simply because he didn't want to fight All Might, that's when Izuku snapped.

He used his quirk to its fully and destroyed everyone who dared get in his way, killing and absorbing as he went, until he ruled the world. Pockets of resistance were immediately snuffed out, all who dared betray him were killed, the Shatter Knight's rule was absolute.

Now Momo Yaoyorozu is going to try something with help from the last person she thought would help her stop the Shatter Knight, let's see how that goes.

Notes:

This is something that's been living rent-free in my head for months now and I think it's time for it to pay up. It's a story of a future villain Izuku and Momo who knows he never wanted this. With help from a manic inventor, she builds something to help fix the problem.

Chapter 1: Jumping back through time

Chapter Text

Momo Yaoyorozu woke up in her lavish apartment, silk sheets, king-sized bed with a silk canopy, but outside was another story. In the streets, Death Knight and Orc soldiers matched, keeping people in line and making sure everything stays in order. It looks peaceful, but it's anything but.

 

The people fear what's to come, the Death Knight kill anyone for the slightest trouble, the Orcs beat others to death, and that's if they didn't drag you to the citadel, no one ever returns from there if they were dragged in. Momo exited her apartment building and came face-to-face with a Death Knight, however, she wasn't worried about dying.

 

Don't get her wrong, she was terrified of the creatures, nothing she could create could stop these things, but she knew it wouldn't kill her, not for reasons she'd like anyway. The Death Knight began to walk and Momo followed close behind, she knew if she'd be attacked by another Death Knight. The Death Knight led her to fancy looking office building, it was where she was working these days. 

 

At first, she joined the resistance to overthrow Midoriya, but they were swiftly defeated. The majority of them were killed, certain females were turned into breeding stock, Momo only escaped because Midoriya remembered her intelligence and made her an offer: join as a scientist or become his breeding slut. Momo joined.


 

Momo entered her lab and went to the main area, she looked around for Mei Hatsume but didn't find her. A note on the door said Hatsume was taken for crimes against the Shatter Knight, Momo closed her eyes and prayed Mei didn't suffer and had a quick death, she didn't wish the fate of most of the females suffer if they were captured.

 

Momo went to the main lab and looked at a machine covered by a tarp, she began walking over to the machine when someone stepped from behind the Machine, said person made her freeze. This was a man standing at 6ft 4in, black hair that reached his shoulder blades, green eyes cold as the frozen tundra, he wore royal purple robes with black fur lining them, leather boots with weights built in on his feet, this is the Shatter Knight, this is Izuku Midoriya.

 

Izuku looked at her with those cold eyes "Yaoyorozu, you've been good on obeying orders. You were told not do anything to go against me, did you think that was a joke?" Izuku asked, frost beginning to form as he slowly walked to her. Momo stood there, fear clear on her face "Midoriya, I have never abandoned you, I swear" Izuku eyes didn't warm at all "then would you care to explain what this is?" Izuku asked pulling the tarp off the machine.

 

The machine in question was a large arch shaped device, there was a keypad and Antani. Momo looked at the machine, then hung her head. "What is this machine, Yaoyorozu?" Momo flinched ".... it's a time machine. Only the mind goes back in time to the younger body, anything you bring with you will be right next to you." Izuku's face hardened. "You planned to go back in time and keep me from coming into power. To keep me from taking over the world, am I right?" Izuku asked, and Momo just nodded.

 

Izuku looked at her for a moment before he signaled to someone out of view, Momo turned to see who it was. It was Albedo, Izuku's right hand woman and the one who helped Izuku through everything he suffered. In Albedo's grip was Mei, she was still covered in grease and dirt, handcuffed, and thankful uninjured. Momo turned to Izuku, he was at the keypad tapping in numbers "I'm putting in a date, near the ten months before our first year at U.A." 

 

Momo looked at him in confusion, Mei was uncuffed and placed next to Momo. Once Izuku finished, he handed Momo a bag "in this bag is all the information you've been collecting about me and everything that happened once we started Highschool. Not only that, but in here is a binder I created years ago, it's a bit scuffed up but still in good condition." Momo took the bag, placing the straps on her shoulder "Um, may I ask what's in that binder?" Izuku smirked slightly "everything Bakugo did to me over the years and everything Aldera allowed to happen to me. As well as a flash drive with several of the things Bakugo and the teachers have said, use them wisely."

 

Momo looked at him in confusion, then looked at Mei who was just as confused "Midoriya....why are you doing this? Why are you helping us like this?" Izuku paused for a moment, Albedo was about to lecture her on gratitude, but Izuku stopped her. He walked over to the window that overlooked the streets "Yaoyorozu, I never wanted any of this. I didn't want to rule the world, I didn't want the deaths that have occurred because of this. I only ever wanted to help people, and for some reason, I was never allowed to." He turned to her, eyes misty with unshed tears and sorrow "I don't want to rule people. I want all of this to be over."

 

Momo gazed into his eyes, the sorrow, the tiredness, the man before her was nothing more than a boy forced to grow into a villain because the world couldn't let him help people out of the goodness of his heart. Momo didn't know when her body moved, she just knew the next thing she was doing was gently hugging him as tears slowly began rolling down his face. This man, no, this boy was never allowed to just be, he had to grow up fast because of the world.

 

The machine activated, a portal opened and was stabilizing, Mei rushed over and checked everything "we don't have much time, if we don't go now, we won't be able to for another five years." Momo looked at Izuku "go, it's time for everything to be made right." A moment later, Momo and Mei jumped into the portal, a few moments later closed. Izuku continued to look out the window, Albedo came over and held his hand. He closed his eyes for a moment, then spoke softly and quietly "it didn't work, did it?" Albedo giggled "no, my love. It worked perfectly." Izuku's eyes snapped open. He was sitting on a couch in a well-furnished and loved house, Albedo sat next to him, wearing a cream sweater that showed a tasteful amount of cleavage. Around the house were various women, some heroines, some former villainesses. Momo was walking by when her eyes met Izuku's, a flash a recognition crossed her face, she cupped his face tenderly and whispered into his ear "goodnight, Shatter Knight" a gentle smile crossed his face "thank you, Yaoyorozu."


 

Momo woke up in her old bed, she looked around and found she was back in her family's mansion. She looked at the calendar and found she was a month away from the ten months before their first year at U.A. Her phone lite up, a message: Hey creation Girl, it's Mei. Hope you got back safely, we need to act fast, before Zuzu loses his head again.

 

Momo looked at the message then a thought crossed her mind. She rushed out of her room and looked around, finally finding her targets, her parents: Robin and Akire Yaoyorozu. She looked at them for a moment before blitzing her mother into a hug, tears rolling down her face and soft sniffles coming from her. Robin gently held her daughter and looked at her husband who looked just as confused as his wife.

 

After a few minutes, they calmed her down and got the full story out of her. The disaster of a first year, every time Izuku was sabotaged and flawlessly blamed, and when he finally snapped and turned full villain. Akire looked at his daughter in shock before asking if she has truth, Momo had a maid go to her room and grab the bag she came back with. The maid swiftly returned with the bag, and she showed her parents everything she and Izuku documented, and to say they were disgusted would be an understatement.

 

"Oh goodness, that poor boy. Why would anyone do this to him?" Robin asked after seeing some of the things Bakugo did to Izuku. "It's about control, this Aldera wanted Bakugo to be a hero, and Izuku the villain he could beat. They needed this to be the case to justify their favoritism." Akire said as he looked over the binder as well. "Mother, Father, I need to speak with Nedzu and a few over heroes. If they know, we can work together and stop this before it gains any traction." Robin and Akire nodded in agreement; this could be stopped before that boy went nuclear again.


 

Thanks to their connections, Nedzu gladly saw the Yaoyorozu family, when Momo explained everything and showed him the proof, he nearly lost his mind. Momo told him the 'pro' heroes and other heroes that needed to be in the meeting as she explained everything, he nodded, more heroes met more help in this.

 

It took a few weeks, but everyone was gathered in one of U. A's auditoriums "hello everyone, thank you all for taking time out of your busy schedules, but this is something that effects everyone." Nedzu said as he looked around. The heroes that were assembled were as followed: the current teachers of U.A All Might, Endeavor, Hawks, Best Jeanist, Edge Shot, Gang Orca, Miruko, RyuuKyuu, Wash, Crimson Riot, the current top ten (I don't know if this is the top ten when All Might was still number one, but we're going to work with it.) there were also the core members of the Justice League: Superman, Batman, Wonder Woman, Green Lantern, Flash, Hawkgirl, and Martain Manhunter. The members of the Teen Titans: Robin, Raven, Cyborg, Star Fire, and Beast Boy (take note, I basically merged the Teen Titans, Young Justice, and DC Superhero girls' teams into one, so the Teen Titans for basically the reps for them.) Also called to this meeting was Detective Naomasa and the President of the HPSC.

 

"Get on with it Nedzu, I've got cases to get to!" Endeavor said, his flames roaring. Nedzu stepped aside and allowed Momo to take the mic "Greetings everyone, my name is Momo Yaoyorozu, in about a year and a half I'll named myself the pro heroine Creati, however, I will be known as chef of science to the world's ruler: the overlord, Shatter Knight. My title will be Fixiz."

 

Detective Naomasa blinked in confusion "what she's saying is true, every word." Batman turned to the Martian Manhunter "J'onn" the Martain looked Momo in the eyes, reading her mind, when he was done, J'onn closed his eyes "everything she's saying is true, but there's a bit more then just that." Superman turned him "what do you mean J'onn?" the Martain turned to Momo, as if asked for her permission, she gave him the gesture for 'go ahead'. He nodded "you see, while her body may be fifteen, but her mind is at least twenty years into the future." that caused to whip their heads at him, then back at Momo.

 

"It's true, while my body is fifteen, my mind is twenty years into the future. Technically speaking, I'm thirty-five years old." Everyone was floored, for a girl to look fifteen, but actually be thirty-five years old, it made them worry about what the future holds especially if they were dealing with someone who called themselves the Shatter Knight.


 

Momo had a projection displayed on a screen "everyone please direct your attention to this picture" Momo had a current picture of Izuku, he wasn't scrawny or short, he just hides using his quirk "this is Izuku Midoriya, he is going to become the Shatter Knight in the future if events aren't corrected." everyone looked at the boy, however several couldn't understand why a boy like this would want to dominate the world.

 

"Izuku is actually a rather sweet boy, but because of several people throughout his life, his compassion for his man was completely eroded." Miruko cocked an eyebrow at this "Oh, what caused that to happen?" Wonder Woman asked, if what she just heard was true, this sweet boy just wanted to help, why would he cause so much destruction. Momo displayed several of the things Bakugo and Aldera did, the attacks, the sabotage, and the many times Bakugo tried to kill Izuku simply for his own ego. Needless to say, no one was impressed "forced to underperform for someone else's ego, attacked for trying to become a pro, and that boy's behavior. I'm surprised that Midoriya boy hasn't snapped already." Ryuukyuu said with a look of disgust on her face. 

 

Then Momo drooped a serious bomb on everyone "in a few days, Bakugo will say something to Izuku that makes him finally snap and show Bakugo he was no longer as kind as he once was." Momo turned to Mei, she has been operating the projector, the pink haired nodded and played the recording Izuku made: "you know Deku, there's a way for you to still be a hero. Why don't you take a swan drive off the roof of the school building, and pray you have a quirk in your next life." the words echoed throughout the room. The pros looked like they were seconds from going to find Bakugo and ring his neck. The members of the League were just as anger "all those years, having to suppress his abilities and deal with a bully simply because their mothers had been friends with high school. He's going to need therapy and a free space for him to release his anger." Superman said looking serious for a moment before looking to Batman "Black Canary has her therapy license, right?" he nodded "she does, and last I heard Superboy and Supergirl were good at listening and helping acclimate to controlling strength."

 

All Might nodded to this "Young Yaoyorozu, would you be willing to tell us what Young Midoriya's quirk is?" Momo and signaled to Mei, then a picture of Skeleton dressed in purple robes with various pieces of jewelry on its person "everyone, this skeleton may be a fictional character, but it's power is very real. This is Ainz Ooal Gown, it's an extremely skilled mage, allow to cast spells of every element and even cast spells that reverse death itself." everyone looked surprised by this "alright, but why tell us this?" Hawkgirl asked. "Please be patient, I'm getting to the point." Momo said as Mei pulled up another picture, this one was of a person who didn't look any older then Izuku or Momo, long light blue hair, a black long coat with black fur on the rigs of the coat and a stern look on their face. "This is Rimuru Tempest. Upon first glance, they seem like an elegant person, but in actuality, they're a slime taking human form."

 

Everyone looked at the picture, no comments made, but they were paying extremely close attention. "Rimuru is extremely powerful, he has a pair skills called Great Sage and Predator. The Great Sage skill is like Jiminy Cricket in Rimuru's head. Guiding him and giving solutions when needed, as for Predator, it allows Rimuru to absorb creatures and use their skills and abilities. This was before Rimuru ascended to a demon lord, now those skills for known as Wisdom Lord Raphael and Void God Azathoth." Momo looked at the gathered group "I'm sure you're all wondering why I'm talking about these two individuals. It's because both of them, every skill, every spell, every item, and every minion that both have, are now under the control of Izuku Midoriya. His quirk allows him to use Ainz Ooal Gown's and Rimuru's powers, their servants obey him and he can easily rebuild their bases of operations."

 

On the screen was a list of everything Ainz Ooal Gown and Rimuru can do, and to say they were terrified would be an understatement. The pros saw several skills that counter their powers, and the League saw spells and skills that could easily overpower even Superman. "I believe connecting Midoriya with some of our magic users would be a good idea." J'onn said to Batman "I can lend a hand every now and then, I know Zatanna would also help when she can, but we'll need someone his age to help him." every member of the League and Titans slowly turned to Raven. Said goth girl looked like she already knew what was coming "fine, I get it. You want me to help the guy." Raven said putting her hands up in surrender, she then looked at Izuku's picture still on the screen "sounds like he could use a real friend after all this time."


 

Momo nodded then had Mei point a spotlight on the teachers "now, if it was just Bakugo, Midoriya would just be someone who had a hard time trusting others and in need of therapy and counseling, but his sabotage and discrimination didn't stop after he left Aldera. It continued after he arrived at U.A" now this caused Nedzu's fur too bristle, at U.A any bullying was met with zero tolerance, so if Midoriya's final step into villainy happened here at his school, meant one of his teachers dropped the ball, majorly.

 

Mei displayed several times when Izuku's grades were sabotaged and Bakugo was never reprimanded for shouting at everyone and blindly attacking people who are 'looking down on him' in his eyes. Nemuri looked like she wanted to kill the person responsible " who was his Homeroom teacher, they sure have corrected this behavior!?" she shouted. Momo's eyes narrowed and had the spotlight solely on Shouta Aizawa AKA Eraserhead.

 

Nedzu's beady eyes narrowed on Aizawa, he never liked it when Aizawa expelled student because they 'lacked potential' but if Aizawa purposefully sabotaged a student, then he would have to be dealt with personally. "Mr. Aizawa, you singled Midoriya out during your Quirk apprehension test, allowed Bakugo to get away with narrow kill him during the battle trials, had raise Bakugo's grades and lower Midoriya's, constantly told Midoriya he wasn't trying hard enough, then during our mid-terms you expelled Midoriya all because he didn't want to fight All Might and wanted to avoid him."

 

Everyone turned to Momo "Ms. Yaoyorozu please explain" Nedzu asked, while Vlad King had Aizawa bound using his quirk. "Of course, you see. Because of the constant villain attacks we suffered, our class was more advance than other years. As such, for our Mid-terms were to fight the teachers who were on a handicap." Nedzu and the other teachers nodded, they understood that was probably the only way the students would stand a chance. "All Might joined the staff this year and he was who Midoriya and Bakugo was up against." Momo then turned to Mei who nodded and she played the beginning of their exam.


Midoriya and Bakugo had just entered the exam site and Midoriya was talking about ways they could defeat All Might "look Bakugo, I've done the calculations, we both stand a chance against All Might, our best shot is to use one of my spells to cause a distraction and avoid him." That's went Bakugo swung at him, Izuku's shield deflected the blow, but had he not had it, that blow might have seriously hurt.

 

"SHUT THE FUCK UP DEKU! I DON'T CARE IF YOU HAVE QUIRK NOW, YOU'RE STILL THE SAME WEAK FUCK YOU ALWAYS WERE! EITHER KEEP OUT OF MY WAY OR MAKE YOURSELF USEFUL AND USE YOUR BODY AS A SHIELD SO I WON'T GET HURT!" Bakugo said teeth gnashing like a wild animal

 

Izuku snarled and used his magic to pin Bakugo to the building opposite them, Bakugo tried to move but the pressure was being to crush him "Bakugo! I have no idea why you think you're so important that nothing you do is ever wrong, but that stops here!" Izuku snarled as he let out a heavy aura of malice and rage. Bakugo's previous anger began to wane as Izuku began to approach his former friend, the suppressed that was leaking from him nearly made Bakugo lose him lunch.

 

"Listen here and listen good. I've only been as kind as I have to you because aunty Mitsuki wouldn't want her son killed but push me too far and all bets are off." Izuku growled, it was clear he wanted to beat Bakugo into a paste and judging by the fact that the aura was increasing and crushing Bakugo, he probably could. "We were friends once, but your ego caused us to lose that friendship, this means I no longer see a need to protect you. Goodbye Bakugo, whatever happens to you from now is not my problem." Izuku said as he released Bakugo and walked into the shadows just as All Might unleashed a massive gust of wind.

 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Time skip ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 

after the exam, Bakugo got wrecked by All Might, Aizawa called Midoriya to his office and told him in no uncertain terms that "your expelled" "WHAT!? What do you mean I'm expelled!?" Aizawa didn't even switch at the raging former student in front of him "Midoriya, you've been a problem since you got into this school, you antagonize Bakugo every chance you get, narrow got Uraraka killed during the battle trials, acted like a complete showoff at the sports Festival, and now Bakugo is in the infirmary because of your selfishness. Now leave, you were never hero material."

 

Aizawa swiveled his chair around to look out the window behind him. Izuku stood there, anger raising higher and higher until he spoke "fine" Aizawa smirked and began making plans to have his personal apprentice in his class. That was until a heavy hurricane erupted through the office, books and papers flying everywhere as a heavy feeling of malice and rage flooded the entire school. Aizawa looked at Izuku, his rage reaching in heights "but know this Aizawa, you've made the world an enemy today. Everyone will suffer because you. Say goodbye to the phantom hero: Overlord, and hello to the world's most dangerous villain, as of this moment, I. AM. the Shatter Knight!" and with that Izuku disappeared.

 

Many months later Izuku was seen again, absorbing heroes and villains alike, his minions killing everyone who got in his way. Some joined him and lived, others were killed, absorbed, or vaporized. The rein of the Shatter Knight was absolute.


 

Everyone watched this and were disgusted. Nedzu slowly turned to Aizawa then SMACK, saw Nemuri slap him so hard the man actually lost a tooth. She glared at him "You've been pushing boundaries for years Shouta, but this. You've crossed several lines and got some many people killed because of some stupid reason, you are not the kohai I knew." Nemuri said as she had to physically remove herself from Aizawa's vicinty.

 

Nedzu looked at Aizawa "Aizawa, I'd hated how you ran your classes for years now, the lies, the trauma, the numerus injures. Most of your students need intense therapy before they can even think about graduating. However, this time, you've gone too far, sabotaging a student all to have your own apprentice enter your class, and because of your selfishness, you set the final piece in motion to destroy the world." Nedzu looked Aizawa in the eyes, remorse was in his eyes, clearly, he knew he messed up big time. "You will no longer be the teacher of class 1-A, you will be aiding Thirteen at the USJ. And know this Aizawa, your ability to expel students has been revoked. If I find out you attempted again, You. Will. Not. Like. The. Results." Aizawa felt a shiver roll down his spine, he just realized he's incurred the wrath of Nedzu. No one can survive the wrath of Nedzu.


 After a few more hours, Momo explained several other things that can be fixed now and stop things from happening in the future. The president of the HPSC made notes about Lady Nagant and this 'river Stix' location. Nedzu decided to have that Toga girl stay with the Midoriya's, judging by the documents Momo gave him, she's going to snap soon herself. When the meeting finally wrapped up, several plans were made to fix many things that could have been fixed if others just opened there eyes.