Raijin could be seen in the middle of a forest at night, he was wearing green arm guards with green shorts that had golden designs on them, similar to the ones that the boulder wears in Avatar (The assassins robes Asami made him were to hard for him to move in), and flickering with a golden light. He had a violin floating above his back that was also flickering with golden energy.
He was trying to use a new technique he made, where he creates a sort of 'hamon arm' by hardening the air in a tail shape. He then uses the arm to hold up the violin away from his body and play it with another, smaller arm. This may sound inefficient in combat, and without question it is, however Raijin had been working on an entire arsenal of violin based attacks, so he needed the violin. Also he didnt like to fight without music.
The draw back to this ability is that the arm can only be so long. One end of the arm has to be touching his body, otherwise it will just disperse. Unlike Ki or Nen, hamon cant directly leave the body, but maintain its form and power. It can only work if it is in contact with its source. The only way for ranged attacks to happen is by using the hamon to guide something else to attack. For example, the Sendo Ripple Overdrive that can hit things through a wall or object, even living things. It is a great attack that was one of the first hamon abilities that Jonathan Joestar learned. It isn't hamon hitting the target, its hamon guiding the force generated by the punch toward the target.
Hamon helps the body create a powerful attack, then guides the force released by the attack. Same goes for the Turquoise Blue Overdrive, it attacks the enemy by hitting them from afar with water. When the user attacks with this, their hamon is really just pushing the water forward and guiding the attack.
(I'm not sure if this is canon, but this is my logic. I looked over multiple episodes and the manga, and I couldn't find anything that counters it. If I mossed something please point it out and Ill change it.)
The violin started to float above his back, then it moved to above his head, and then his right arm, and it just kept moving around his body as he got accustomed to using it. He wasn't able to feel anything like he could with a normal arm, because the hamon arm didnt have any nerves. He could only feel what was inside the hamon and nothing else unless he focused on it. The hamon arm was only air and hamon in the shape of an arm, not an actual arm, so it only had the functions of moving and gripping things.
As he accustomed his music with the movement, he thought about what exercise he should do. 'I could do some super intense exercise like the Armageddon workout, or I could do a simple one like Saitama's. I don't have a limit, so it doesn't matter what I do because I will still see significant results. I should go for something that is faster, but still not to complicated, otherwise I might lose focus on hamon and my violin.'
Eventually he decided to just do Saitama's workout, but with a few extra exercises and a hundred times the reps. This was because he had a slightly different limit break then Saitama, so he needed to train for longer to have the same results as him.
"Alright! This should do, now all I need to do is figure out how to play at the same time as exercising. Okay, lets try this." Raijin said before he closed his eyes and focused on his hamon arm and violin. He started to have it play a song for a second, it sounded terrible. He practiced for a few minutes before he figured it out and could play it just as well as he could with his normal arms. This was due to his musical genius status.
He then opened his eyes and made a serious face. He got onto the ground and started to do pushups while he sung and played the violin.
Will somebody
Let me see the light within the dark trees shadowing
What's happening?
Looking through the glass find the wrong within the past knowing
(Oh look, an English song. Weird huh? I said I was going to stop using the Japanese ones for a while, but I forgot and ended up using up more then I meant to. Anyway, I picked this because this is one of the songs I like to listen to when exercising and I find it effective.)
He started to do a huge amount of pushups and insane speed. He was going so fast that the ground underneath him shook a little. He knew that doing slow reps were more effective, however he figured that if he did them fast enough, then his body would think it was only doing one rep extremely slowly. Then it would be more effective.
While he was exercising, singing, and playing music, he was also somehow thinking at the same time without losing concentration on any of the tasks. 'I need to set a priority list. I haven't been doing things as efficiently as I think I could, so I need to know what my current goals are in order.'
'First, I want to get revenge on that asshole Liam. I wouldn't really care if his only goal was to take over the world, I don't really like it either and wouldn't mind if it was destroyed by him, it wouldn't even effect me. However! He killed grandpa, and that was pretty fucked up to say the least. So my first priority is to get strong enough to find and kill him.'
'My next goal is to find the limits of hamon. I wished for hamon because I wanted to explore its possibilities. I want to find every use for it that I can, because it is probably one of my most favorite power systems in anime. They didnt expand on the subject as much as they could have in the anime, so I will do it for them. I will find ever use for hamon I can and exploit it to its limit.'
'My third objective is to find and meet up with Senku. I came to this world in particular for two reasons, one, because it was supposed to be fairly peaceful with the only enemies being animals and Tsukasa's both of which are weaker then everyone in my family. The second reason is that I really like the canon and story, and if I can learn science from Senku or Xeno, then I could reach an even higher peak and do whatever I want.'
'My fourth goal is to be a part of the canon. Although I don't really like humans, I think it would be interesting to go on an adventure like that. All of the traveling, building and mental games that Senku and the others go through on their journey seems extremely exciting and I would love to be a part of it. So I need to find a canon character or area soon so that I can join up with it.'
'My fifth and final goal is to kick Tsukasa's ass. Not because I don't like him, or because I think it would be fun. No, my reason is that when I had first read through Dr. Stone and thought he was evil, I vowed that if I ever met him, I would beat the shit out of him. I cant go back on a promise I made to myself, even if he was shown to be a good guy later on. It may be a dumb reason, but I'm sticking to it.'
'Okay, so my current goals are, 1. Kill Liam, 2. Master hamon to its limit, 3. Meet Senku, 4. Join the canon, 5. Beat up Tsukasa. Okay, that doesn't seem to hard right? I will have to do the hamon and Liam things at the same time, the do the final three. Damn it! I forgot about the other things that could have been added by the hamon wish. I still have to figure out how to kill the parasytes and if there are more masks, or even worst, pillar men and stands. Although I could also probably use a stand if there are any, I don't think it will be very effective against a perfect pillarman with one as well.'
'So I also have to become strong enough to face a pillar man, or possibly even a perfect being, that also has a stand, just to be safe. Okay, they are some pretty ambitious goals, but I think I can achieve them eventually. But first things first, I need to train some more and kill Liam. He is my first goal and probably the most important to me at the moment. I must avenge grandpa!'
He finished up his inner dialog and noticed that he had already been doing super speed exercise for six hours. He had subconsciously switched the exercises after he reached a certain number. He was confused by this, but let it go as he didnt think it was important.
He also wanted to know why thinking six paragraphs took six hours, however he decided to think about that later as well, because Asami was sitting in front of him with a pissed off expression on her face.
"Oh! So you finally decide to acknowledge my presents! Only took you six hours!" She said in an angry tone.
"What were you ignoring me for? Were you so into thinking about hentai that you couldn't even look at me?" She said.
"What? No, I just got focused on doing exercises, so I didnt realize you were there, I'm sorry." Raijin said as he hurriedly got up and said gently.
"Really? You expect me to believe that? I have been yelling in your ear for hours and I even hit you a few times, how can you ignore that without conscious effort?" She snapped back.
"I don't know! Maybe I'm sick or something, or you are hallucinating, because I don't believe that I would just ignore you for hours like that!" Raijin yelled back, he was starting to get fed up with her strange personality changes that happened all the time.
She just huffed and stomped off back to the camp angrily. 'What the hell?' Raijin thought as he didnt know why either she made that up, or why he couldn't sense her.
But he didnt know about his bodies ability to ignore anything that it deems worthless and to weak for it to acknowledge, and apparently it didnt like Asami.
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I will write another chapter if you reach 100 power stones. Thanks for reading.