Hey guys, this is a direct sequel to that other Thor story I did, A Certain Almighty Thor. If you don't want to read that, tl:dr, Thor gets Isekai'd by World Rejector. Please Read and Review, and thanks for crach shipping guy for helping me with this.

Thanks for all your reviews in the previous Thor story.

Disclaimer: I do not own Toaru Majutsu no Index or My Hero Academia.


Thor woke up on a rooftop.

He felt like he had been sleeping for a long, long time. Where was he anyway? The last thing he remembered was Kamisato Kakeru, and his world rejector sending him to another world. He looked at his surroundings. They seemed pretty normal. Was this the "new" world?

Thor looked around from the tall rooftop. His surroundings definitely weren't Academy City, based on the look of it. It didn't look that modern, and there were no wind turbines to be fonud. But it was a city in Japan.

He didn't really care. He didn't really have any attachments to his old world, and nobody had any attachments to him. All he cared about was having fun, fighting strong people and getting even stronger. Didn't Kamisato say just before he was sent away that he would send him to worlds with many strong people to fight?

That thought alone sent Thor shaking in excitement. He couldn't wait. But he would have to try out how his power worked first.

He activated the power within him of the Lightning God Thor, and generated twenty-meter arc blades.

Just as he activated it, his vision blurred, and when he blinked, there was a new sight in front of his eyes.

It was like a watermark in a video. Thor recognised this as a User Interface, like in a game. 'What the hell is going on?'

A female voice in his head responded. 'It's been a while, Thor.'

'Mjnonir? Is that you?' Thor telepathically thought.

'Yes it is.' She sighed. This was her voice before she had been turned into a cylinder. 'I'm inside you know, as an AI or something.

'That's pretty cool.' Thor kept the reunion short, and got straight down to business. 'Now, do you have any idea where this is, and why I am here?' Thor hopefully asked. He wasn't really expecting anything.

'As a matter of fact, I do. In this world inside of you, I have much more precise and powerful electrical capabilities, much like the #3 Railgun. I downloaded all the info I could about this world from its internet, so just ask and I will respond.' She explained. She paused for a before revealing this. 'I have apparently been inputted with information which explains your situation here. Do you want to hear it?'

'Yeah, of course.'

'Alright, so Kamisato's World Rejector sent you to this world, due to your desire to fight something stronger than you, and gain more power.' Mnjonir explained

'Well, that I figured out so far.' Thor remarked.

'Wow, great job.' she said sarcastically. 'Do you know the story of the world tree, Yggdrasil?'

'Well, of course. I'm not named after a Norse god for nothing. It's the tree of the world, which paths lead into 9 different realms.'

'Yes. Well, your situation is similar to this. The 'system' which Kamisato Kakeru confined you in is called Yggdrasil, and your objective is to move between worlds. This is the first world you're in, and to get to the next, you have to kill the strongest person in that world.' She revealed.

'Heh. That sounds really fun!' Thor thought excitedly. Finally, he would do what he loved without interference. 'This system sounds superb!'

'Yeah, but there's a catch. It's not going to be easy for you, as you don't have access to your full power, only a fraction of it. You'll gain more power as you reach the heights of the Tree, but right now, you're at your base. Take a look at the UI. I made it for you to quickly understand your limits and give you an advantage in fights.'

Thor looked around his field of vision. On the bottom left was a red health bar, and below that was a blue bar, presumably for Mana. He was a magician after all.

His smiling face was cropped in a circle and pasted above the bars. Nice touch.

On the bottom right, however, was a few boxes. He looked curiously at them and found little symbols.

There were 3 boxes. The leftmost one was a small picture of his arc blades. The middle one was of a Hammer, and the last one was a model of the Earth.

His three attacks, the arc fusion blades, summoning Mjolnir, and Almighty Thor.

'Back home, you only had the ability to make your electricity into arc fusion blades. But here, you can summon me as a hammer. Once you have me in your hands, you can manipulate electricity all you want.'

'Like Miko-chan~' Thor exclaimed. A lightning god not being able to control lightning freely was stupid, and he was glad he now had that ability to do so.

'But you have a time limit with me. Remember, you're weakened. Also, your Almighty Thor mode would only last for a second or two, and it will leave you unconscious for 24 hours. That's how weak you are right now.'

'That's better! Now I can have fights that are more fun than ever! Almighty Thor made it too easy, to be honest.'

Mjolnir sighed. 'You'll get the power you held back home once you reach the 6th or 7th world. But in the final worlds, you'll gain power. A lot of it. And when you conquer the tree, you'll gain all its knowledge of Norse magic, and be able to travel to any of the worlds instantly. You'll become someone on the level of a magic god.'

Thor listened carefully. There was something wrong with her. 'What's wrong?'

'Nothing.' She dismissed his worries. 'Anyway, after you've done that, you can bring us back home, and I'll become a cylinder again.'

'You miss Marian don't you? You've always been super attached to her. Don't worry, after this is over, you can go back to her.'

'That is if you can beat this. Some of these worlds are no joke, I've got a sneak peak of them already. You'll have to get so much stronger.' Mjolnir warned. 'And yeah, fine. I miss her. I'm not like you, you emotionless brat. I'm counting on you to bring me back, so I'll cooperate to the fullest.'

Thor smiled. 'That's what I wanted to her. So who's our first target? Who's the strongest man in this world?'

'Well, first of all, let me fill you in about the mechanics of this world. It's going to be a long story, so listen carefully.' Mjolnir advised.

So Mjolnir told Thor all about this world. This world of Quirks, Pro-Heroes, Villains, and it's rules and regulations. After twenty minutes, Thor knew as much as the other residents of this world. 'Sounds fun. Let me guess- The strongest man is the number one pro hero, All Might?'

'Probably. That's on the side of justice, but maybe there is a villain with power comparable with him. It's a good first guess, so I guess you should take him out ASAP.' Mjolnir explained

'Hell yes! I've been itching for a good ol' fight.! You said his powers were super-speed, super-strength, right? He'll be a great first opponent! No pesky projectiles, it'll be a showdown!' Thor declared.

'Yeah, it won't be as easy as you think. I'll bring up some footage of his fights in your eyes.' Mjolnir said. She loaded a video and put it into Thor's eyes, covering the UI.

A muscular man wearing a skin-tight spandex costume with a long yellow cape flapping in the wind could be seen. He was facing off another large person with the same. In a flash, the villain was defeated.

Thor was taken aback. He was fast, very very fast. Thor wasn't concentrating, so he didn't even see what All Might had done. The villain was immobile and laying on the ground. There was no major damage anywhere.

'Wow… I can see how he's the strongest in this world… Play that again, I wasn't really paying attention.'

The video played again. This time, Thor could truly appreciate All Might's speed. This time, he could now clearly see that speed of his.

Mjolnir, sensing what Thor was experiencing, explained it for him. 'Since I'm in control, I gave you higher level eyesight. Did some stuff with nerves and that stuff, you wouldn't understand.'

'Cool. I'm done. I can see what he is capable of, and I think I can take him!'

'No you can't, didn't you see-'

'Sure I can! Ok, let's try out these abilities that I have. Starting with summoning you.' Thor said eagerly to check out his new power.

'Fine. FINE! I'll cooperate, but don't blame me when you are defeated and thrown into a cell. Summon me, and you'll have the ability to control electricity at will. However, this mode will last for at most 2 minutes, and you'll be tired after it. You also cannot summon me after that for 10 hours, as I will be building up my strength.'

'That sounds great!'

'No, it won't. I won't be able to talk like this to you, and your UI is gone. You will be alone, so use it wisely.'

'Hell yeah. Let's use it now!' Thor yelled

'No! Didn't you listen?' Mjolnir mentally screamed at him. 'Use it when you see All Might. Now, just experiment with your strength and arc fusion blades. You still have your belt of strength, and the blades will be the same, just shorter. 20 meters is the limit.'

'All righty! Who should I challenge first?' Thor wondered to himself. He looked down on the ground, and searched for someone who looked strong.

What he saw was a group of schoolboys looked to be in middle school. They were all following this one guy and listening to him.

'He must be a leader, and to capture the admiration of that many means that he's strong!' Thor thought excitedly. He took a closer look at the boy and examined him closely.

He had spiky blond hair, with a face that looked like he was bored. He had red eyes, and hands in his pocket. His face suddenly changed, as he snapped at one of the guys with him, turning into a face somebody would assume to be a murderer.

"Who is this…" Thor muttered. Could Mjolnir scan faces? Maybe he was in some kind of bank of details, which Mjolnir could hack into. 'Can you do that?'

Mjolnir sighed. 'Probably. Give me some time.'

'Nah, I don't have time. You'd better do it while I beat him up~' Thor jumped off the building, landing straight in front of the gang.

"Yo." Thor greeted the gang. "Let's fight." He said casually.

The boy's gang surrounded him. 'Who the fuck are you? Don't talk to him like that, he'll trash you!'

"Who are you?" Thor inquired. "Never mind, by the looks of you, what you are is weak and irrelevant. I don't need you." With that, Thor stomped on the ground with his super strength and the shockwave from that blasted the extras aside. 'I want you.'

"Huh? Fine then. I'll kick your ass, you fucker!" He yelled out aggressively and blasted forward somehow.

"Hmm? I wasn't expecting you to agree like that. I like you, you're my kinda guy!" Thor said sadistically, blasting forward himself with his super strength

They clashed, and with a bang, Thor was sent back with enough force to cause a dent in the concrete wall he smashed into. 'Huh. Wasn't expecting that. Were those explosions coming out of his hand?'

Mjolnir replied. 'Yeah. His name is Katsuki Bakugou, and his quirk is Explosion. He is able to create explosions out of his hands. I found my way into the quirk registry' She said smugly. 'He's just a kid, and this is just practice, so finish this quickly.'

'Nah, I'll take my time.' Thor looked over at Bakugou, who was not letting Thor time to rest. He propelled himself forward with his explosions and launched a big right hook, which Thor did not even try to counter.

Thor was thrown into the ground but immediately got up. "Not bad. You gonna be a hero or something later?"

"Hell yes I am, and I'll be the strongest motherfucker around," Bakugou said aggressively. "This is my turf, you get that?" his hands lit up. "I'll beat the shit outta you, and bring you in, villain!" Bakugou again charged full speed at Thor.

'Huh. Why am I a villain now?' Thor wondered. It must be because he beat up the guys. That would be illegal. 'Anyway, my durability seems pretty good. It might be a bit weaker than back home, but I can take a punch. Let's see if my strength is the same then.'

Thor stomped the ground once again, causing rubble to fly up. He grabbed the largest piece of concrete, a huge thing which was a couple times larger than Thor himself, and threw it straight at Bakugou. Thor flexed his arms. 'At the very least I can do that,' he thought to himself.

That did not faze Bakugou, however. He merely blasted the piece of concrete out of the way, up to the sky, and continued onwards. "DIE!" he screamed, a large explosion coming out of both his arms. This was bigger than anything he had done before in the fight, and it was fast too.

Thor went top speed but couldn't evade the blast. Once he saw that he could not avoid it, he threw his own attack, a punch with all of the strength he had at the explosion.

It dampened the explosion, but Thor was still hit with a lot. Bakugou landed on his feet a few meters away. "Not bad, Bakugou-chan~"

"How the fuck do you know my name?" he growled, stopping for a second.

"Ahahahahah, you don't need to know that." Thor grinned at him once again. "But it's time to end this." That last attack by Bakugou shook him up a bit. He was not a saint, or a magic god or some kind of special being. He was merely a magician. But he had Megingjörð, the item which mimicked the belt of Thor, giving him strength and the ability to survive even a bridge crashing on top of him.

He activated his arc fusion blades, like he had done so many times before.

Unlike those times before, however, the blades he summoned now were only two meters long.

'Can you increase the length, Mjolnir?' Thor asked.

'Yes. Give me some time to prepare the connection.' Mjolnir said

Thor grinned. 'Take your time, I can wait.'

Bakugou charged at him explosively. "What are those puny blades gonna do to me, huh?!"

Thor merely laughed, and swung the 5 blades on his left hand. Bakugou sensed the danger coming up to his face, and jumped backwards quickly.

That saved Bakugou's entire face from being cut up. Instead, Bakugou only received a small cut on his face. "Bastard." he growled.

"Oh man, you're being so damned boring right now. Is that the extent of your strength? This world is filled with weaklings." Thor lamented. He really was bored right now. "I think I'll just end this."

Bakugou, after receiving the multiple insults thrown at him by this person, couldn't take it. He was the strongest, he had the best quirk, he was the best. Those were facts that other people told him all his life. And now some random stranger came in and had the balls to call him a weakling? No way he was gonna stay still. Screw that, this bastard had to die. "Call me a weakling? Now you're gonna taste it you piece of shit!" Bakugou screamed.

Bakugou rushed in like a maniac, barely out of the range of the arc fusion blades. Bakugou wasn't an idiot. He knew how deadly those blades were first hand. He would instead bombard Thor with from two meters out.

"Times ten," Thor muttered. Instantly, the arc fusion blades lengthened ten times over. They were now about twenty meters long, and Bakugou was in range. "You lose." Thor moved his fingers expertly, intending to strike Bakugou in five places, in which he could not escape all of them.

But Bakugou didn't give up. He saw those attacks coming at him, and calculated a specialised manoeuvre which allowed him to evade all of them, coming at all angles. He integrated his explosions to make them possible for himself, using them to bounce all over the place. He ended up in the sky, more than 25 meters above the air, well outside the range of Thor.

Unfortunately for him, Thor was expecting the event that Bakugou could maybe somehow evade all of the arc fusion blades. He used his strength to jump up into the air, next to where Bakugou was. The arc fusion blades were deactivated, and Thor punched Bakugou in the face, full power, into the concrete below. Bakugou smashed into the ground, creating a small crater in the concrete.

Thor landed on his feet softly, and walked up to the barely conscious Bakugou. "You weren't bad, y'know. You exceeded my expectations and evaded the fatal attack. For that, I'll let you off with nothing more than a bad beating."

Though in no shape to attack, Bakugou could still manage some words. "W-who are y-you?" He croaked.

Thor smiled. "You don't need to know my real name, but you can call me Thor I guess."

"A-are you a villain?"

"Nah, I'm on nobody's side except my own. Good, evil, those concepts mean nothing to me. I just wanna have some fun fighting others and getting stronger, yeah? Well, it's been nice talking to you. I see some potential in you, so I might be able to have some fun with you when you get older. Thanks for the good time, Bakugou-chan~"

With that, Bakugou lost consciousnesses and everything went black for him.

Thor retreated back to his rooftop, satisfied. He still had power and was confident in beating All Might. He would try the next day, but now, he would sleep and replenish his power.


So Thor got isekai'd, he got nerfed, and he has to kill the strongest person in that world to move on to another isekai. He beats Bakugou to assert his dominance, and now his sights are on All Might. Thanks for reading, and please review.