AN: So this is my first BNHA Fic, and the first fic I've written in a long time. I hope that you enjoy!

SLAM.

A boy with a mop of blond, unruly hair found himself smacking against a hard surface, bouncing off, and skidding against the concrete. The boy barely had time to feel tears well up in his eyes before he felt calloused appendages wrapping themselves around his throat, a rough hand hoisting him up from his previous position on the sidewalk.

Red eyes widened, a choking, and gargling noise coming from one Katsuki Bakugo's throat as he attempted to desperately suck oxygen into his burning lungs. The impact had knocked the wind out of him, and with the hand wrapped around his throat, cutting off his air, he found his lungs to be desperately craving something he could no longer attain.

The person who had picked up the child was still only a child himself, a boy around twelve with midnight raven hair, an angular face, and an averagely built body. "Where the fuck do you think you're going, brat!?" He questioned aggressively, his hand tightening further around the young Bakugo's throat.

Instead of panic, or fear in the blond boy's eyes, the black-haired offender only saw anger. Those eyes quickly narrowing, and an aggressive growl escaping the blond's throat. Distinctly, they both heard a small, panicked scream of "KACCHAN!" The older boy paid it no mind, but Bakugo quickly became angrier. He could handle this, but his timid best friend, Midoriya Izuku, couldn't.

He didn't want his friend in the world of pain he was currently in. He raised both his hands up, aiming them at the offender's face, he flailed them madly in a desperate attempt to get himself free. His struggles only seemed to amuse the older boy, who laughed at his pathetic attempts.

The blond didn't know what overtook him, he raised a hand towards the black-haired boy's face, his hand deathly still as he let out a loud scream.

"DIE!"

The sweat on his palms bubbled for a fraction of a second before violently exploding. Although the explosion didn't cause any severe damage to the older boy, the shock, and the flash of light had been enough to concuss him, making him drop the blond boy onto the floor, gripping his stinging eyes.

"KACCHAN!" He heard that damn scream again, and the thudding of footsteps only got louder.

He tilted his head back, watching his best friend sprint at his offender, his arm having changed, growing metallic, and gaining a texture that is only seen on rebar.

The four-year-old Midorya slammed into the person who had assaulted his best friend, his hardened hand impacting painfully against the attacker's liver, and making him double over in pain.

"LET'S GO!" Izuku shouted at Bakugo, motioning for him in a panicked manner. Stunned not only by his display of a quirk but by Izuku's as well, it took him a minute to respond, but he quickly got to his feet, and the two boys quickly ran off before the older boy could recover.

It had taken them a few minutes, but the pair eventually found their way to Izuku's home. They had not stopped running, terrified of the older boy catching up to them. The moment that adrenaline stopped coursing through their young veins, the pair crumpled, bending over, and wheezed desperately in an attempt to catch their breath.

A few moments later, their labored breathing had slowed considerably, and Izuku was the first of them to break the silence.

"KACCHAN! YOUR QUIRK MANIFESTED!" The curly haired boy shouted with unrestrained excitement, his voice filled with glee for his friend.

The blond's chest puffed up in no small amount of pride, grinning at Izuku.

"Psh, yours did too, and you're the one that managed to knock him on his ass!"

Midoriya paused, staring at his friend with a sense of awe. "…I did?"

Bakugo merely rolled his eyes. Who would have thought that Deku, the biggest hero fanboy in existence, would not realize that he had finally taken the first step to achieve his dream; manifest his quirk. "Look at your arm, dumbass." He said, mirth filling his tone.

Midoriya looked down, and sure enough, his arm had undergone a very noticeable change. Flesh and bone had disappeared, replaced with heavy, rugged rebar. Almost his entire arm had changed, the transformation to the heavy rod of steel reaching just beneath his elbow, even his fingers had undergone the change, he noticed, his joints and ligaments replaced with swiveling metal.

He tried moving his fingers and the metal creaked in protest, his fingers responded sluggishly as the metal curled at a slow rate.

A look of shell-shock crossed Izuku's face.

He had done it, he had manifested his quirk!

He swiveled around sharply, adrenaline once again coursing through his veins as he rushed up the steps, his friend momentarily forgotten as he slammed his hand against the door, metal thudding against the wooden surface as he excitedly and erratically knocked.

Midoriya Inko opened the door not a moment later, a green-haired woman that was nearing her thirties, the woman looking quite annoyed with whoever had disturbed her peace. Her eyes widened as she took in the form of her son, his metallic hand still outstretched. She slammed into him, wrapping him into a tight embrace as tears of joy streamed down her pristine white skin.

"MY BABY!" She squealed, "YOU DID IT!"

"I DID IT~!" The young Izuku squealed happily, and Inko hoisted her boy up into the air, hugging him tightly against her chest. His own tears of joy beginning to seep out of his green eyes.

She raised him up into the air, giving him a wide grin, sniffling softly as tears still softly trickled down her features.

"You know what that means, Izuku?" She uttered playfully.

"I'M GOING TO BE A HERO!" He squealed once again in response, and she hugged him close to her chest once again.

Bakugo gave a deadpan stare.

Man, the Midoriyas were a bunch of fucking crybabies… Even then though, he still couldn't help but feel warmth and happiness fill his chest at the prospect of him and his best friend growing together, and fighting alongside one another, becoming the top heroes of their generation.

He turned around slowly, careful not to interrupt the moment between the mother and child, as he walked away.

The rest of the day went by like a blur for the young Midoriya. He didn't know how, or when it happened, but he eventually found himself seated on the couch, still admiring his metallic arm as he waited for his mother to finish cooking dinner. The delicious smell of katsudon wafted through the room, and kept the young boy eagerly bouncing in place.

For some reason, the young boy felt that he was hungrier than usual, like he hadn't eaten in days. It only made him all the more eager to enjoy his favorite meal.

He didn't know when it happened, but eventually the novelty of having his quirk had worn off. He stared at the hand, his green eyes no longer filled with awe, but with curiosity. He flexed his fingers once again, noting how they shifted uncomfortably-unnaturally-in their transformed state, metal grinding against metal making for a low squeaking sound as he moved his joints-If they could even be called that anymore.

"….Mom?" The young boy called out, uncertainty filling his voice.

"YES HONEY?" His mother's voice rang out, loud and as sweet as ever.

"How…How do I turn it off?" He questioned.

"OH, THAT'S SIMPLE HONEY, YOU JUST…" She paused momentarily, then cursed under her breath.

How DID he turn it off?

Well, it looked like it was time to make a visit to the quirk doctor. Izuku had to go get his quirk registered, anyway.

And so, after a filling dinner, the pair found themselves in a doctor's office. An overweight, friendly looking man with a bushy mustache, and a shaved head staring curiously at the small boy. Izuku was sitting in an oversized swiveling chair, and his mother stood by idly for support, the quirk doctor leaned in closely to inspect the metallic arm of the young boy.

"Well…" The doctor started, "It's certainly a unique quirk, that's for sure." He stated. "Usually, transformation- or as you probably know them- Body enhancement type quirks don't usually manifest so strongly, especially not at such a young age." He uttered, rubbing his chin thoughtfully.

Izuku blushed at the praise, and his mother beamed at the doctor.

His hand reached for a small clipboard laying atop his desk. The doctor peered over it once more. "Hmm…" He hummed, "His quirk factor is rather high, which could explain how strongly it manifested. But from what I see, it's more than just a simple 'Hardening' quirk. Those require constant concentration to maintain… You seem to require that only at the preliminary stages."

"Say, my boy. What did you feel when you activated your quirk? What exactly did you think of?"

Izuku fiddled nervously in his chair, idly scratching at his metallic hand. "I just wanted to be tough enough to defend Kacchan!"

He tilted an eyebrow at the name, but didn't comment on it, simply letting the boy continue.

"I was looking around, and I saw a piece of metal lying around… It was the toughest thing I could see, and I was wishing that I could be that tough."

He quirked a brow once again, strong emotional experiences were what it usually took to trigger a quirk, or cause it to manifest, but for the boy to manifest his quirk in a way that resembled something around him?

Oh it was much more than an ordinary hardening quirk, that was for sure. The doctor had a small hunch, and he'd have to test it to be sure. He simply *had* to sate his curiosity. Sure, he saw quirks of all kinds on a daily basis, but such a strong quirk manifestation in a four-year-old boy? It was simply unheard of.

Unless, of course, hardening, or simple body enhancement wasn't his quirk at all.

"Izuku," He started softly, and pointed at a nearby medical bed, more specifically, he had pointed towards the metallic railings that had made up the metallic base that supported the bed "I want you to look at that, and think of the exact thing you thought while you were saving your friend, okay?" He uttered and locked his gaze onto the boy.

Izuku nodded quickly, and with not a small amount of excitement. He gazed at the metallic railings carefully, taking in how they looked, how smooth the stainless-steel surface was, and its rough diameter.

He sucked in a deep breath-and surely enough-The very tips of his fingers on his untransformed hand began to glow.

The doctor sucked in a large breath as he saw the boy's fingertips transform right before his eyes, flesh and bone disappearing, giving way to hard metal. The boy didn't get very far with his transformation, as he had barely managed to transform his fingers to the first knuckle before the glowing stopped, and Izuku leaned forward, his breathing heavy and shallow.

The older man gently grabbed hold of Izuku's hand, using his free hand to lift off his greenish goggles, so he could take a better look at the transformed digits.

"Amazing…" He spoke out faintly, before managing to collect his composure. "Young man, your quirk, it is-"

And then suddenly, Midoriya Inko, who had kept quiet for most of the appointment made her presence known.

"-TRANSMUTATION!" She blurted out suddenly, making Izuku jump in his seat, and giving the doctor quite a startle.

The man gave her an inquisitive look, his gaze simply begging for an explanation from the woman.

She blushed deeply, now embarrassed by her sudden outburst. "His quirk.. I mean. His quirk is transmutation."

When his curious eyes didn't relent, she explained further. "He can… C-Change his body's composition, transforming-Or transmuting it into whatever he desires as long as he knows the chemical composition, and the rough dimensions."

The doctor gave her a blank look. "And how do you know this exactly?"

Her cheeks reddened further, but she still spoke. "I.. Well.. It was my Husband's quirk." She uttered softly, as her eyes took on a nostalgic tone.

Izuku looked at his mother in amazement, while the older man simply gave her a deadpan stare. "And why didn't you mention any of this in the first place?" He said, annoyance clear in his tone as he pinched the bridge of his nose.

"It didn't.." She paused, trying to look for the right words to describe her point. "My husband couldn't use it in the same way that Izuku had."

The doctor nodded, and she continued.

"He had to focus if he wanted to maintain the transformation. Which is why he never got really far with it, but Izuku doesn't have to. That's why I thought a different enhancement quirk had mutated in him. He wasn't born with his arm looking like this, so it couldn't be a mutation quirk either."

His eyes widened with a sense of curiosity. "How do you know so much about quirks?"

"My husband was…" She bit down on her bottom lip nervously. "He used to research quirks quite a bit, and when you spend so long around somebody like that, you sort of pick some things up." She said with a nervous chuckle.

"Why didn't you simply show the boy to your husband then?" He asked, with genuine curiosity filling his tone. The doctor quickly cleared his throat when he saw the distant, hurt look in both of their eyes.

"Nevermind-" He said swiftly. "Now, Izuku!" He said, his tone filling with mirth and warmth once again. "Since we now know what your quirk is, and we have a name for it, I think we're done here." He said, ruffling the boy's green curly hair.

"But doctor!" The freckled boy whined "I don't know how to turn it off!"

"Oh! Well, in most cases with enhancement type quirks, you simply have to relax your body, and stop concentrating on that one spot. But, since your case is so unique, I'm going to wager that something so simple won't work."

"Try the opposite of what you had to do to manifest. So think about the fact that you're safe now, or that your task had been completed!"

Izuku breathed in sharply, and closed his eyes, following what the doctor told him. With a bright glow, the metallic appendages had swiftly transmuted back to flesh and skin, almost instantly, in fact.

The doctor smiled, settling the green goggles back over his eyes, staring as both Midoriya's had their chests puffed with pride as they slowly, but confidently strode their way out of his office.

He sighed deeply as he sat back into his chair, "Amazing quirk, strange kid. I'm sure I'll see plenty of him in the future…" He trailed off, before leaning a hand over his intercom, fingering hovering right over the button that would send in his next patient.

He stopped just short of pressing the button, his hand instead moving to grasp the clipboard once again. He swiftly produced a pen, jotting a few small notes at the bottom of the page. He'd have to ask the receptionist to mail this to the Midoriya family.

However small a role he could play, he wanted to help the child grow. The boy was brought to him from the moment he could speak, and ever since then, Izuku had wanted to be a hero.

It might have been too early to tell, but the sheer determination, the sheer will in his eyes.

Izuku would grow to accomplish great things, that much he was sure of.

A small blond boy found himself at the familiar front steps of his friend's home. He jumped up the steps quickly, as he did every day, and practically slammed his fist against the door, abusing the wooden barrier that had kept his friend from him.

"Coming!" He heard a feminine voice call out, and not a few seconds later, the door opened to reveal a disheveled looking Inko, her hair looking much more messy than usual. The stained apron around her waist told Bakugo that he had probably pulled the woman away while she was cooking breakfast.

Her face brightened upon seeing the small boy.

"Hey, Baku-chan!" She smiled warmly, leaning over and ruffling his hair. He didn't allow anybody to touch his hair or invade his comfort zone. Not even his relatives got away with that. But... Inko-Obasan simply radiated warmth, everything from the kind smile on her face, to the way she gently, but affectionately held him. It made him feel… Well, nice.

He'd let her touch him, he decided. But only this one time!

Of course, he made the same decision every single day, but that was besides the point.

"Izu-chan is inside!" She exclaimed, her voice carrying the same warmth that her smile held. Her bright smile was suddenly replaced with worry, as she started to fuss over the small boy.

"Are you hungry?" She questioned, "I was just in the middle of making breakfast!"

Was he hungry? Yes. He was so excited about the fact of playing together with Izuku using their quirks that he had completely forgotten all about breakfast. Was he about to tell her though? Hell no.

"I already ate." He lied, and she didn't believe him one bit.

"Bakugo." She said, disappointment marring her voice. He sighed and spoke through gritted teeth. "Fine!"

Immediately, her expression of worry was wiped away, replaced with a happy, mirthful smile. "Come on in!"

'Well' Bakugo decided inwardly 'Izuku looks like death'

The small boy deep, dark bags under both of his eyes, his hair was more of a mess than normal, that, and he looked pale, unusually so. Not to mention, he seemed to be staring off into the distance, his eyes unfocused and hazy.

Bakugo could even swear that he looked thinner than he was yesterday.

"What happened to you?" He asked in a brunt manner.

"OH!" Izuku's eyes lit up in recognition. "Hey Kacchan!"

"I've literally been staring at you for the last five minutes hoping that you'd notice me. What. Happened?"

"Well, Since I manifested my quirk yesterday, I had been trying all night to summon it, But it takes ages just to get my fingertips transformed, and even then it takes a lot of out of me. So I went online and started researching quirks, and the different things that they do, particularly enhancement quirks and how they work. It helped me a little bit, but it didn't make that much of a difference, I could only do it slightly faster, and it seemed to be faster the more I did it, but it takes a lot of energy, and I feel really hungry, and it's going to take a while before I eve-"

"NERD!" Bakugo cut him off, anger dancing in his crimson eyes.

Izuku promptly stopped.

"You're mumbling. Again."

Izuku blushed in response, even the redness of his cheeks seemed to be rather pale. He raised a hand to his hair, scratching at it sheepishly.

"Sorry… You know how I get."

"Repeat. Slower." Katsuki demanded.

"I spent all night trying to practice my quirk and didn't sleep."

Bakugo threw both of his hands in the air in frustration "Why couldn't you say that in the first place!?"

"D-didn't you?" Izuku stuttered.

"Didn't I what?!" Bakugo snapped.

"Practice your quirk."

"…No?"

"And you want to be a hero? Idiot."

"WHAT DID YOU SAY, DEKU!?"

"YOU CAN'T BE A HERO WITHOUT PRACTICE, BAKA-GO"

"I'LL SHOW YOU, DEKU!" He extended his palm out, aiming it in Izuku's direction, and immediately, the sweat on his palms began to bubble.

Izuku immediately extended a fist in front of him, the tips of his fingers beginning to glow.

"BOYS. BREAKFAST IS READY!" Shouted Inko from the kitchen, immediately causing both boys to halt as their stomachs growled in unison.

They both narrowed their eyes at each other and each extended an accusing finger.

"Later." They both hissed, and swiftly made their way to the kitchen.

A few years later

He could feel his heart beating harshly in his chest as he was inched closer and closer to his destination, his veins throbbed painfully in his neck, as eager as he was, Izuku was also very nervous. His birthday presents were never required this much preparation, but his mother deemed it appropriate to blindfold him before leading him to his present, which meant that it was probably something very special.

He resisted the urge to raise a hand up, and rip the black fabric away from his eyes, but he didn't want to anger his mother, after all, she had insisted on him wearing it. Inko had led him only a few steps from the living room before he accidentally slammed his foot against something- A wooden step- His excitement however, far outweighed the pain, and he so much as flinch.

His mother let out a hurried apology, excitement still palpable in her tone even as she tried to seem as apologetic as possible, she was probably just as excited as he was.

He was led up the steps with minimal incidents afterwards, and a few moments later, he felt his mother's grip tighten on his shoulder. He halted in his tracks. He heard the distinctive sound of metal clicking against metal. (A sound he had grown quite accustomed to from practicing and working on his quirk so often.) He heard his mother fumble with what he only assumed were keys. His hunch was quickly proven correct as he heard the click of a door being unlocked.

His mother pushed on his shoulder again, and he was hurriedly pushed inside the room. He heard his mother suck in a deep breath, before the blindfold was all but yanked from his young eyes.

Before him, lay what could only be called a treasure trove to the young Midoriya. It was a medium sized room, one which he had never entered before. There was a large, mahogany desk on the opposite side of the room, the desk still lined with papers, books, and a few notebooks. A well decorated fountain pen, and a small metallic ink holder than had dried long ago.

Mahogany bookshelves lined the walls of the room, there were four in total, the two on the right-hand side were filled with books of all shapes and sizes, while the ones on the left hand sized were lined with small notebooks.

The room hadn't been used in many years, but still held a pristine sheen to it, his mother had, after all, religiously cleaned, and upheld the room even in his father's absence, however, he had never examined the contents of the room itself.

The green haired boy hurried over, curious to see just what his father had lined his shelves with. Much to his surprise, and his excitement, the books were all related to a singular subject; Quirks.

Izuku's eyes were practically glowing as he gazed over the titles of the books. "Quirk Theory", "Quirks And Biology" were some of the ones he first laid eyes on, they looked fairly new, and he quickly saw some older, leather-bound books that had to be decades old. "Quirks; The First Major Step in Human Evolution".

He could barely contain his excitement, bouncing in place as he went to the mahogany desk , picking up the small stack of notebooks that were atop it and flipping through the titles.

"Quirk Theory" and "Quirk Analysis #32" were at the very top of the stack, he squealed in glee. That was just like his Hero Analysis notebooks! A warmth flooded through his chest as he realized he had inherited some of his father's traits.

His mother didn't mention his father often. Only that he worked "Somewhere far and safe". She had likened him to his father on more than one occasion, claiming that he had inherited not only his father's eyes, but his analytical skills, and his intelligence as well.

He shook his head before that train of thought went on for any longer. His father was… A touchy subject for him.

He focused on the notebooks once more, some of them had all-encompassing titles like "Enhancement Quirks #9" But some quirks were notable, or even complex enough to get their notebook. He found only four such examples on the stack that had occupied his father's desk.

The first notebook was titled "Quirk: Void". Young green eyes widened at that, his mind drifting through all the possibilities of what a quirk like that could do.

The second one was labeled "Quirk: One For All". He chuckled at that, its name was rather cheesy, but noble. Almost something like his favorite hero All-Might would exclaim. He would definitely have to give that one a read later, he decided.

The third was simply called "Quirk: Creation" Izuku blanched. If that quirk did what he thought it did, then he was a little bit jealous. He was tempted to flip that one open right then and there, but the notebook right beneath it had gotten his attention.

It read: "Quirk: Transmutation" HIS QUIRK! He grinned in excitement, turning to his mother and giving her a bright smile. She returned his grin as she saw the title of the notebook.

"Happy Eighth Birthday, Izu-chan~!" She said happily, as tears began to form in her eyes.

He turned to his mother, practically leaping at her and enveloping her in the tightest hug his young frame could muster.

After a few minutes of hugging, and crying (They were Midoriyas, after all) His mother had decided to leave him alone in his father's study, and the boy moved to the large, black leather chair with a bounce in his step.

He slipped into it carefully, the notebook being tightly hugged to his chest as he did so.

He softly laid the notebook on the surface of the mahogany desk. He handled the notebook as carefully as he could, treating it as if it would shatter if he happened to simply brush against it too harshly.

With a gentle finger, he flipped the notebook open, quickly glancing over and beginning to read the first page of the book.

The very center of the first line simply read. 'Transmutation.'

Izuku paused briefly, admiring just how unique his father's handwriting seemed to be.

It wasn't like the flowing, and smooth Kanji his mother practically drew on the pages, gliding her hand along effortlessly, in a rhythmic flow. Nor was it like his own, hurried scribbles, any beauty being ignored in favor of fast, and efficient note-taking.

His father's calligraphy was… Simple, it was the only way to describe it, almost robotic in fact, it seemed that every kanji letter had been printed on, but it wasn't. He could see the small imperfections that dotted the notebook, a streak from the fountain pen running out of ink, a few droplets of dark liquid smearing the page after a hasty refill, almost instinctively, he could pick up the small flaws and analyze them like no one else could.

He blushed, embarrassed, even with those small faults, his father's handwriting was polished to near perfection, a far cry from his own hurried scribbles, understandable to only his own eyes.

Origin: An off-shoot of the Quirk "Creation" of the Yaoyorozu bloodline. Conceived when a male with the "Creation" quirk had intermingled with a female with the quirk "Hue shift"

Izuku's eyes gleamed. "Wow..." He breathed out softly. So his father was a Yaoyorozu? It was certainly an interesting revelation. But he could somewhat see it, understand it. The Yaoyorozu were as renowned for their intelligence as they were for their vast wealth.

The young boy knew about them, of course, his obsession with heroes and quirks alike had made sure of that. While certainly, not a lot of the Yaoyorozu bloodline had opted to become heroes, but the ones that did stuck out as some of the very best, being indispensable in both combat and rescue situations.

It filled him with a certain sense of pride, knowing that he belonged to a family of heroes.

The quirk "Hue shift" allowed the user to shift minor things about their appearance, mostly limited to the color of the hair, eyes, nails, and skin. The quirk also requires constant focus, and metabolization to maintain.

The quirks managed to mutate, and merge together in the offspring, limiting the effect of "Creation" to the user's own body, with the downside of needing constant focus being inherited.

The green haired boy's eyebrows quirked up curiously. Something didn't sound right, he didn't have to focus on maintaining his quirk. He only had to when he was transmuting a part of his body.

Maybe his quirk had mutated?

It was very unlikely, but it wasn't impossible. Quirks mutated, and got better as they passed from generation to generation. Growing more complex, and more difficult to control in the process.

The Yaoyorozu family, and the Todoroki family were proof of that.

Long ago, the famous "Creation" quirk had been limited to creating hunks of unrefined ore from the body.

The Todoroki family came from similarly humble beginnings, it was hard to imagine that Endeavor's quirk had mutated from a simple fire breathing quirk six or so generations ago.

But quirk evolution took time, and it wasn't like his quirk had evolved completely differently from his father's.

It was more like a different version of the same power.

He broke his train of thought, choosing to press on with reading.

Details: Transmutation, allows the user to transform their own body into anything they desire, but much like the originating quirk; Creation, the transformation is limited to non-organic material.

That made sense, Izuku thought, at least he wouldn't have to worry about accidentally growing a second head.

The quirk, also much like creation, requires the user to know the exact chemical make-up of an object to be able to transmute it

He knew that much already, after all, he had spent countless nights reading up on the composition of different materials (Mostly metals) and experimenting with his ability to transmute.

This re-engineers the body's fat cells, consuming them in the process, and requires constant focus and metabolization to maintain.

Izuku perked up. There were some obvious differences between his father's quirk, and his own, but they were essentially the same power.

It seemed that he was going to have to make a few notes of his own, but he dared not ruin his father's well organized, and neatly written notebook with his own messy, and rushed Kanji. Instead, the young boy slipped out of the leather chair, and hurriedly skipped out of the room

He dashed back a few moments later, a plain notebook in one hand, and an All-Might pencil in the other.

His hand was shaking as he extended the pencil towards the cover, but for once, he wasn't shaking from fear or nervousness, he was shaking from excitement.

He brought the graphite tip of the pencil against the cover paper, and began to slowly, and carefully write out the title of his own quirk analysis notebook.

"Transmutation. Version 2"

He decided that it would be a fitting title. It was simple, yet effective, at least to his eight year old mind.

Before he began scribbling his notes in the fresh notebook, he picked up his father's book once more, picking up where he left off.

The transmutation process consumes more time, and more energy the more complex the object is. Taking up to a few seconds for a complex creation. The time it takes to transmute an appendage is not too noteworthy, but could work against the user's benefit if suddenly confronted with combat.

The green haired boy frowned, that was yet another difference that he noticed almost immediately. His father took seconds to transmute something 'Complex'. While it took him minutes and most of his energy to simple transmute one of his arms into hard metal.

Sure, it stayed that way when it was done, and he didn't need to dwell on it any further after that, but he was still jealous of his father's efficiency and speed.

'Another difference I have to write down' He mumbled to himself absentmindedly.

The transmutation quirk is quite versatile, allowing the user to "Mimic" other quirks, copying their abilities in a more mechanized fashion. A speed enhancing quirk could be mimicked by integrating a booster into an appendage, and likewise, a hardening quirk could be mimicked by transmuting metal subdermally, allowing the skin to be much harder than it normally is.

Izuku's gaze turned curious. Hardening? Like the Pro Hero, Crimson Riot? He already knew how useful hardening a limb could be, it wasn't only a boost of defensive abilities, but offensive ones as well.

But.. To limit the hardening to the skin? He wanted to smack himself for not thinking of that, and to think that he had his quirk for nearly four years!

The green haired boy raised his hand up to his face, and then promptly shut his eyes, focusing intensely.

A few splotches of shiny, silver metal started appearing at the center of his palms, they looked like droplets of spilled ink, standing out against his tanned skin.

His eyes fluttered open after a few moments, a wide green crossing his young features. He pulled his other arm upwards and started flicking the small spots he had managed to transmute. His grin only got wider as he heard the distinctive clicking of metal. It was sloppy, and a bit slow, but it was a start. He was sure that once he mastered it, would be a much faster way to reinforce his arms. It wouldn't be as solid as changing the entire thing into metal, but he figured it could do in a pinch.

Wait… If he could use his quirk's abilities to mimic other quirks. Did that mean he could mimic Kacchan's quirk? The only thing he had to do was figure out the chemical composition of nitroglycerin, and with enough practice, he could probably turn his sweat into Nitroglycerin the same way that Katsuki did.

Sure, he wouldn't be able to ignite it at will, but it would be a start. And he was sure he could figure out a work-around with enough time.

Izuku's eyes scanned further down the page, a bit disappointed to see that the analysis had already ended. So soon?

That was what, two pages? If that was all there was to the quirk, then what possibly made his father use up and entire notebook for this?

Now curious, the boy gripped the notebook in his hands, and began flipping through the pages.

Much to his surprise, and amazement, each page he had flipped through showed a different illustration-A well-polished sketch, hand drawn with a title above it, and a short description beneath it.

The green haired boy's eyes bulged. The notebook had what, a hundred pages? And practically all of them were filled with some sort of sketch.

He flipped to the very center of the notebook, curious to see what exactly these sketches were.

'Quirk Mimic: Air Cannon.' The title read, and the sketch showed off the cross-section of a mechanized arm, filled with all sorts of different compartments, with a long thick, metallic tube going through the very center of the arm, and jutting out of the palm. His father had even scrawled in rough dimensions, and the material for each component.

He swallowed. That was… a little advanced for him, he had to admit. Just transmuting his arm into solid metal took a lot out of him. And he had already been shown that he couldn't fine tune the dimensions of his transmutation, as he had barely managed to transform a few patches of skin. Let alone an entire arm, filled with moving parts...And were those tiny gaps he saw lining the sides of the arm?

But still, just the prospect of him being able to eventually achieve something like that made him bounce eagerly in his seat once again.

His father had to be extremely creative, and smart to be able to come up with so many ideas for such a quirk.

He flipped through the notebook again, trying to find something simpler, something that would get him started in following his father's footsteps.

A Year Later

Green eyes fluttered open at the incessant ringing of an alarm. The curly haired boy yawned, softly sliding a hand over to the button, and stopping the annoying beeping that had woken him. He smiled to himself, sitting up, and stretching his arms over his head with a loud, but cheerful groan.

He twisted his body, naked soles finding themselves impacting soundlessly against wooden flooring as the boy practically skipped out of his bed. Energy filling him from the moment he opened his eyes.

Izuku followed a fairly simple morning routine. He'd wake up, take a quick shower, brush his teeth, eat a large, healthy meal that his mother prepared, and then he'd go out, find Katsuki, and the pair would go for a run together before they headed out for school.

Convincing Katsuki to exercise wasn't an easy task, but somehow, the young boy had managed to convince his blond friend about the importance of exercise when it came to developing their quirks. He had only discovered the importance of physical training about eight or so months ago, when he read through one of his father's many notebooks about enhancing quirks. Apparently, the best way to maintain enhancement quirks was to exercise regularly and have a proper diet so that the quirk had plenty of reserves to draw upon.

He woke up expecting the day to be like any other day. But instead of the smell of a delicious breakfast wafting through his room, he only heard an eerie silence. That wasn't right. His mother was up before him nearly every day, and if she wasn't cooking, then she was usually cleaning around the house, or vacuuming.

He tilted his head curiously, trying to listen for something, for anything that would indicate his mother's presence.

Silence.

Having inherited his mother's worrywart nature, he immediately expected the worst, and he dashed out of his room, his morning routine all but forgotten as he went to look for his mother.

He checked the kitchen first; nothing. Everything had remained untouched, even the dirty dishes from last night's Katsudon dinner had been left unhandled.

The living room? Also nothing.

No quite worried, he rushed back upstairs, bursting through the door of his mother's room.

He found her. Her face was buried deep into a pillow, and her frame was shaking, her shoulders bouncing quietly. Her fingers were clutching the pillow so tightly that her knuckles had turned white, and she had yet to respond to his presence.

Only when his beating heart calmed down he realised what she was doing. His mother was crying, sobbing weakly into the pillow.

"M-Mom?" He asked weakly, taking a hesitant step forward towards his prone mother. She didn't answer.

"Mom?!" He practically shouted, his feet moving instinctually, his hand moving to grasp her frame.

She jolted, quite startled, she looked up at him, her eyes puffy and red from all the crying, and her nose runny. Seeing him must have awakened something, because soon enough, tears started running down her face once again.

"I-I-Izuku.." She choked out, spreading her arms and motioning for him to come closer. He immediately found himself in the arms of his mother, Inko hugging him as tight as she could, almost as if he would disappear any second.

"Mom... What happened?"

Her tears spilled that much faster, and she buried her face in his chest, beginning to sob loudly once again. He could barely pick up the words that she sputtered out in between the sobs that wracked his mother's frame.

"Yo-Your father…" She stuttered out and sobbed that much harder against him.

The hairs on the back of his neck stood up, cold goosebumps beginning to creep all over his young frame.

"Wh-What?"

She pulled away from his chest to momentarily look up at him, her bloodshot eyes taking a moment to focus on his own green orbs. She clenched her teeth, sniffling softly before speaking.

"Izu-chan…" She started softly, wiping away her tears, and then gripping him by the shoulders so he would look at her.

"Your father..." Her voice cracked momentarily. "He's in a coma…" She spoke softly, each syllable she forced out causing a stabbing pain in her heart.

He only had vague recollections of the man that he had called his father. All that remained of him were hazy memories, broken recollections of a mysterious man that had long ago disappeared.

There was one memory in particular that he had clung to. He was young, maybe three years old or so, bouncing excitedly in his father's lap, his mother's laughter echoing throughout the room.

He remembered kindness, warmness emanating from the man, even if the details and the structure of his face had been lost to time.

He felt as if something had punched a hole through his heart.

"We don't know if he's going to make it."

Izuku maintained his wide-eyed stare, shock and confusion maring his face. "What happened?" He asked again, his voice cracking just like his mother's voice had not a moment ago.

"He…" She trailed off, biting down on her bottom lip, tears welling up in her eyes again. Guilt pooled up in her eyes. She couldn't keep the secret from him, not any longer.

"He was fighting a hero… And he lost."

The hurt expression in the boy's eyes hurt his mother deeply, and the faint tears prickling at the edge of his vision made her own rise to the surface again. "Why!?" He asked, clearly hurt. Why had a hero taken his father from him!? What had his father possible done to warrant such an attack?!

Inko visibly choked up from his question. "He-he..He…" She could barely formulate words, she knew what was coming would possibly break her son. But he had to know, the truth couldn't be kept to him, not when he was now beginning to mature.

"He's a Villain..." She uttered.

Izuku's blood ran cold.