Deku, God of Thunder

by Midoryia-Uzumaki13

All Might may have told Midoriya Izuku that he did not possess the ability to be a Hero. However, as Deku comes to learn, he is worthy to be so much more. Not my story

1. 1

Chapter 1: Mjolnir

Chapter Text

Midoriya's heart jumped into his throat as he asked the question. "Can someone like me..."

He shook, but suppressed the quivering in his fingers. This was his chance. His chance to ask his Hero.

"Without a Quirk..."

Midoriya pressed his eyes shut, unable to look at the Symbol of Peace. "Be A Hero...?"

--

The scene ran through Midoriya Izuku's mind again and again as he ran through the city streets, burnt notebook in hand. He sniffed hard in an effort to stop the tears that were already flowing and allowed his legs to carry him to through the streets until he didn't recognize where he was anymore. He didn't know how long he had been running, and at this point, he didn't care.

"No."

He'd finally heard confirmation from his Hero himself.

"You can't be a Hero."

Someone like Deku...Quirkless and powerless, could never be a Hero.

"I guess when All Might tells you, that's really all there is to it," Midoriya choked, not watching where he was going.

In fact, his legs carried him without thinking until he was off the sidewalks, off the roadways, and a decent way from civilization. As he wiped his eyes and caught his breath, he looked around and realized he didn't recognize where he was, or how he came to be surrounded by trees.

"There's not a forest around here... is there?" He asked to no one in particular. He was met with silence at the inquiry, and Deku looked around for any signs of life.

"Hello?" He called into the woods.

A few animals skittered and rustled the leaves around him, but there was no answer. However, in the distance, he could see a light from a clearing. "Maybe that's where I came in from..."

Deku wandered through a thin, beaten path towards the light, a little embarrassed that he had allowed himself to lose track of time and even his location in his breakdown. But as he approached, he realized that this clearing wasn't civilization. No, he had come across a small pond. In the middle of the pond, there was a rock of sorts jutting up from the water, perfectly centered and surrounded by the tall trees of the forest. There, sitting on the rock, was a large hammer of sorts. It was a simple hammer; a rectangular block of some sort of metal, the wooden handle pointing straight up into the sky.

In any other circumstance, Midoriya would have felt disappointed, perhaps even fearful that he was lost.

Not today.

For some reason, that hammer was calling out to him. Not vocally, of course, but something in Deku's chest made his heart flutter. His mind went numb, filled with nothing but a desire to get that hammer. Thoughtlessly, he began wading through the waist-deep water, not minding that he was getting his school uniform dirty, not minding as the bottom of his backpack skimmed the surface.

Midoriya Izuku climbed the rock with ease and looked down at the rather intimidating weapon. He grabbed the handle, expecting the hammer to feel heavy, but to his shock, he lifted it easily, holding it up to eye-level with one hand.

"Is this a prop or something?" He wondered, aloud. He ran a finger over the surface of the hammer which confirmed that it was indeed a solid, metal hammer.

It was then that a bolt of lightning came crashing from the crystal clear blue sky and struck the young man dead in the chest. Afterwards, Midoriya was gone.

Gone, but not dead. He blinked a few times and gasped. No longer in the mysterious woods, Midoriya found himself in a mysterious hall that stretched taller than any building, stained glass windows all around him.

The hall itself was empty, save for one man sitting on a throne at the back of it. The man was far different from any Midoriya had met before; he looked like something out of viking folklore with a winged helmet, a braided beard, and long blonde hair that was beginning to turn gray. He had a metallic eyepatch covering his right eye, and his face was rugged and scarred from many battles.

However, at Midoriya's appearance, the viking looked down at the boy and gave a broad grin. "Ah! It appears Mjolnir has finally found someone worthy!"

"Wh-what?!" Midoriya exclaimed. "T-this is a joke, right? Where am I?"

The viking stood up. "I'm not one for jokes. I've got a rabbit friend, him and his tree are good at jokes. But you boy? This is no jest. For you are worthy! You are no longer Midoriya Izuku!"

"I'm... not?" Midoriya asked.

The viking descended the stairs and shrugged. "Well, I mean, no, you're still Midoriya Izuku, but not just that! You have inherited my title! You are the GOD OF THUNDER!"

At this, the clapping of thunder was heard outside of the stained glass windows, louder than Midoriya had ever heard it before. The throne room itself shook at the announcement. He flinched, and that's when he saw it; he had, indeed changed.

Holding the hammer, Midoriya's body no longer looked like his one. Even under his school uniform, his lanky body had morphed into a muscular form. Not outlandish, but a body that could only be secured by, say, if he had spent the better part of a year hauling trash off of a beach. The hammer, Mjolnir, sent a tingling force of energy through his entire body.

As he marveled at what had happened, the viking clapped him on the shoulder. "Look at you! Back in my day, the Midgardians would say you looked, 'swole.' I need to make this quick: I'm Thor. God of Thunder. Or, I was. But after a few thousand years, I need to retire to focus on running Asgard - that's where we are. I'm not the warrior I used to be. That's where you come in."

Midoriya felt like his head had gotten hit by a truck. Or maybe hit by the hammer he was holding. "W-wait! God of Thunder? I'm you now? Asgard?"

Thor bellowed out a laugh. "Of course not, no. I'm me. Look at you. Even with the muscles of an Asgardian god granted by Mjolnir, you're still tiny compared to me. You scrawny boy. We can talk later. It looks like you're needed."

"Needed?!" Midoriya exclaimed, more confused the more the god spoke, "Needed how?!"

He didn't get an answer; with the wave of his hand, a blast of lightning struck Deku, and he found himself no longer in the halls of Asgard, but in an alleyway. He looked to his hand, still finding Mjolnir clutched tightly in his shaking right palm.

But he had no time to question this over the sounds of screaming and explosions. All thoughts were erased from his head as he recognized one of the screams.

Kacchan...?

Midoriya peered outside the alleyway and was met with a scene of chaos; the Sludge Villain all Might had saved him from earlier was running rampant again, and a plethora of Pros were all around... but none of them were advancing. Why?

He squinted closer and saw; Bakugou was in the thralls of the sludge, the same way Deku had been when he had been saved by All Might.

"How did he get..." Midoriya began, but then it hit him.

It was his fault; he had grabbed on to All Might, and he must have knocked the bottle loose from the Hero's pocket.

I...I have to do something! He realized, If I don't, Kacchan will die! Because of me and my stupid Hero fantasies!

His legs moved without thinking for another time that day as Midoriya charged forward, but something else did too. He grabbed Mjolnir by it's thick, leather strap, and spun the hammer around by his side. He could feel something welling up in his chest. The elements, forces of nature, were swelling within his heart.

He could feel it. Midoriya grinned widely as Pro Heroes shouted for him to get back. He couldn't hear them over the sound of lightning pulsating in his veins.

The Sludge monstrosity turned to look as he tried to suffocate Bakugou, and for a second his eyes widened in shock. "You...?"

"FOR ASGARD!" Midoriya shouted, turning the hammer so that it was spinning in front of the villain.

A pocket of concentrated air surged from Mjolnir, emulating the Texas Smash he had seen from All Might earlier in the day. At the force, the villain was pried from Bakugou and the streets, splattering against the side of building with squelch.

"YOU LITTLE BRAT!" The villain cried, peeling himself from the wall.

Bakugou looked up at Midoriya in shock as the green-haired boy lifted his hammer to the sky. From the pouring rainclouds, a bolt of lightning came, as if he called by Deku, and struck Mjolnir.

Deku roared, pointing the hammer towards the Sludge Villain, and blasted him with a bolt of lightning that blinded the entire street; all that could be heard was the sound of his screaming.

When the surround crowds and Pros regained their sight, the Sludge Villain was splattered against the ground, unconscious and smoldering. At the sight, even Midoriya's breath seized up in his chest. "H-how...?"

"You," Bakugou growled, snapping Deku out of his brief trance. The blonde looked up at him, mixed emotions etched on his face. The most evident were, shock, relief, and rage. The two boys looked at each other, to the hammer in Midoriya's hand, and back to each other once more. "What did you do, you..."

That was about all Bakugou managed to get out before they were both pulled aside by paramedics.

"WHAT DID YOU THINK YOU WERE DOING KID?!"

"ARE YOU EVEN LICENSED FOR THAT?!"

"YOU COULD HAVE GOTTEN KILLED!"

Midoriya barely heard the screaming of the Pros around him as they admonished him. Unlicensed heroics, were frowned upon, he knew, but at the moment it didn't seem to matter. All he could do was stare down at Mjolnir. How did I even know to do that?!

He looked up and blinked. From the back of the crowd, he could see All Might in his emaciated, weakened form. The two made eye contact.

And All Might beamed at him. In that moment, Deku felt his heart swell; no matter what the crowd said, he had done the right thing.

In this day, he had been a Hero.

Unfortunately, the police officer who grabbed his shoulder and spun him around disagreed. "Hey kid, are you licensed to interfere like this?"

Midoriya shifted right back into a panicked state. "T-to b-be honest I j-just kind of found this hammer and..."

The officer walked a few steps away and grabbed his walkie talkie. "What should we do about the kid?"

But as he turned around, a bolt of lightning crashed down onto Midoriya again, blinding everyone. When the light faded, Midoriya Izuku was gone.

--

"Gah! Next time give me a warning," Deku cried, collapsing in the halls of Asgard, at the foot of Thor's throne.

The Asgardian roared with laughter. "Well, not like I could shoot you a text when you're talking to the police."

Deku caught his breath and stood up, dusting himself off. "Why?"

"No phone." Thor shrugged. "Still, you're a natural. I knew, I knew from the moment I saw you, you were worthy."

Deku looked down at the hammer in his hands. "Worthy...? But... I'm a Quirkless nobody..."

Thor grabbed his shoulders, making Deku jump. "Exactly! Come, sit down."

To Midoriya's surprised, Thor sat down on the steps leading up to his throne and beckoned for Midoriya join him. Deku complied, still wondering if this was some sort of dying dream as he choked to death on sludge. Maybe All Might never saved me. Maybe this is just my brain coping with death.

"Back when I would adventure on Midgard - Earth, as you call it," Thor explained, "there were not many superpowers. Or Quirks, as you call them now. Some of the people who did have these abilities, we rallied together to protect Midgard from those who sought to destroy it. We were called the Avengers."

Midoriya jumped to his feet and took a few steps back. "Hold it! The Avengers?! Like one of the first ever Pro Hero Teams?! You're THAT Thor?!"

Thor puffed out his chest. "The very same. Not to brag, but I was definitely the strongest Avenger. I... what are you doing?"

Thor looked at the boy in confusion as the teen dug a small notebook out of one of his pockets. "W-we learned about you guys in Quirk history! I-I even wrote a research paper about whether or not your ability to control lightning was proof of you as an alien or an early Quirk emergence! I have so many questions! What is your hammer made of? Do you generate the lightning, or command it from the sky? Like is it inside of you?"

"Alien?" Thor scoffed. "I'm Asgardian. Slow down."

"What differentiates Asgardians from humans? How long is your lifespan? Does that mean Loki is still around?"

"Ugh, you're just like Banner," Thor groaned, clasping a hand over Deku's mouth. "Stop nerding out on me. Besides, you wrote the paper. You probably came to some pretty good conclusions."

Deku thought back to his own opinion on the paper; that the Mighty Thor was just an early emergence of Quirks who let power go to his head, and called himself a god out of an ego.

He decided not to disclose that.

"But, according to our classes, Hulk was..." Midoriya began.

"The Hulk was what?" Thor asked, huffily.

The Hulk and Captain Marvel were recorded as the strongest Avengers. "Um...nevermind," Deku replied, scratching the back of his neck. "Didn't you disappear hundreds of years ago?"

"Yes, well, Asgard got destroyed, blah blah blah, endless cycle of Ragnarok, blah blah blah," Thor rolled his eye. "Long story short, periodically, Asgard goes through a rebirthing process, and when it came back, the Asgardians came back. My replacement decided she was sick of leading, so here we are."

"O-oh." Midoriya replied. "Okay. Well, I guess that lines up with my notes, but... what does that have to do with me being worthy?"

"That's what I had been talking about before you went into science mode," Thor laughed. "Anyway, back then, there weren't many who had the power to stop evil. And now? Now you live in a time where almost everyone has the ability. And the people who are the most able only seem to care about it doing so for coin or fame. Now, don't get me wrong. There's nothing wrong with the glory of battle and the spoils of a fight. But you?" Thor grinned. "You're the only Midgardian whose entire drive revolves around saving others."

Midoriya looked down at his own plans, setting Mjolnir down on the step below him. "So you think I'm worthy of being a Hero? Because I want to save others?"

Thor shook his head. "Not just me, Midoriya. Mjolnir deems whether or not you were worthy. I thought you were worthy, so I put it there, sure...but you're the one who proved it."

"Mjolnir thinks I'm worthy..." Midoriya sniffed. And then, a tear leaked out of his eye followed by many more. Before he knew it, he grabbed Thor in a hug and bawled. "THANK YOU THOR!"

"I - whoa - hey, stop. You're getting me all wet." Thor gently pushed the smaller boy aside. "You're more emotional than that old Man of Spiders. Anyway, don't thank me yet. We'll need to train you."

"Train me?" Deku asked, rubbing his eyes. "Won't I get trained at Hero school?"

Thor laughed heartily and clapped Midoriya on the back. "What, you swing the hammer around twice and think you can get into some sort of Hero school? Don't be daft. You're still an amateur. You, young Midoriya, are going to learn to fight like an Asgardian God of Thunder, because starting today, that's who you're going to be. I'll see you tomorrow, young Midoriya. I'll send a lightning bolt for you after your classes."

Before Midoriya could ask anything else, Thor clapped again, summoning a lightning bolt that struck Deku. Before he knew it, he was outside of his apartment building, Mjolnir in hand.

Deku stared up at his building, then back down at his hammer, and then backup again, trying to process the events of the last hour.

One hour. Sixty minutes, and he had gone from, "Midoriya, Quirkless loser who should kill himself," to, "Midoriya...God of Thunder?"

"I've got to be dreaming," Midoriya muttered to himself.

"OI! THERE YOU ARE YOU SHITTY DEKU!"

Or maybe this is a nightmare, Midoriya groaned, inwardly. He turned around to see Bakugou Katsuki marching up to him, a scowl across his face. Or, as Deku liked to call it, his, "default face."

Bakugou stopped in front of Midoriya and paused, looking at the hammer hanging limply at the shorter boy's side. But he shook that off and launched into an angry tirade. "I DIDN'T NEED YOU TO SAVE ME TODAY!"

"I... uh... okay, Kacchan, I believe you," Midoriya replied, rubbing the back of his head. Of course you didn't. Sure.

"Just...JUST STAY OUT OF MY WAY!" Katsuki screamed. "YOU'RE STILL A SHITTY USELESS NERD, EVEN IF YOU FOUND SOME STUPID SUPPORT CRAP. GIVE ME THAT!"

"Kacchan, wait!" Deku yelled, but it was too late. Bakugou had grabbed for Mjolnir, and pulled it from Midoriya's hands.

But something weird happened. The second Midoriya let go, Bakugou lurched forward as the hammer fell to the ground with a massive crash.

"Ugh!" Bakugou grunted, pulling on the handle. "HEY, HOW DID YOU MAKE THIS SO HEAVY?!"

Bakugou grunted and bent down, grabbing at the hammer with both hands and tugged. Mjolnir, however, did not budge.

"Kacchan, let me see -" Deku began, but he was met with an explosion to his chest, which knocked him back a few feet and on to his ass.

Bakugou stood up and scowled. "If a weak little shit like you can lift this, I should be able to." Bakugou squatted down and tugged on Mjolnir once more, to no avail.

Deku stood up, and smiled, despite himself. Watching Bakugou struggle with the weapon, when usually everything came so easily to him, made Midoriya chuckle. Slowly, he reached a hand toward Mjolnir. But when he opened his palm, another curious thing happened; Mjolnir lifted from the ground, flipped over and flew straight into Deku's hand in a second flat. Even better, when it flipped upright, it bonked Bakugou right in the nose, and sent him back onto his ass.

Deku wrapped his fingers around Mjolnir's handle and grinned.

"OW!" Bakugou cried, clutching his nose with both hands. A small trickle of blood seeped out. "Wha dib you do to my nothe?!"

Midoriya smiled down at his hammer, and gave it a light toss into the air, flipping it once and catching it by the handle again. "It's my hammer, Kacchan." He turned, giving his childhood friend a small wave. "See you tomorrow."