I can already tell that based on my schedule, chapter is going to be either short or take a bit to come out. Likely both. Sorry for delaying this, have too much stuff going on isn't the best for my free time. Also, 100 follows and nearly 100 faves. Let's go!
After the first three days, three more passed uneventfully.
There were quite a few demon attacks, they lived in a forest full of them, but the quality of the attacks was lacking. No demon lasted longer than thirty seconds in combat, and the only one that did was able to do so because she attacked with a group of five. Tanjiro's battle prowess and Zenitsu's speed made taking on the two an impossible feat, something only an insane person would do. However, despite how many they killed, Tanjiro still gave each and every demon he sent off a proper goodbye. Sending a prayer to the Shinto, making sure that they might have good fortune in the next life, giving them a peaceful, easy death. The kind of thing Percy encouraged.
Speaking of Percy, the man in question had disappeared lately, having not spoken during those three days. Tanjiro could feel the familiar presence in his mind, but couldn't quite place what had happened, or how to resolve it. He tried reaching out several times, only to get nothing but weird stares from his IRL companion. At some point, he just gave up on it.
Screaming alerted him to a human nearby, but Zenitsu was awake and he didn't want to risk letting the blond boy get hurt. So, he dragged him along and put the two in a tree as they observed the situation.
A boy, likely the source of the scream, was thrown into a tree by something nearby. He collapsed, coughing up blood and no longer holding a weapon. A swamp green hand came flying into the area, hitting the boy again and pinning him to the ground as the rest of the demon emerged.
Easily the largest demon Tanjiro had ever seen, it stood over ten feet tall and half as wide. Composed entirely of a torso and hands, two red eyes were seen peeking out behind what Tanjiro assumed was a protective outer layer. The beginnings of a neck could be seen, but not enough for a full slash. Right now, Tanjiro was really regretting not asking Percy to show him how to locate stuff with water. As two hands went for the kill, Tanjiro knew that now was the time to act.
Landing on the ground with a downward swing, Tanjiro cut off both hands before they could reach the boy, standing in front of him like a guardian angel. His hands and sword were positioned in front of him, pointing directly at the heart of the oncoming demon.
"What's this?" the demon asked, his voice coming out raspy and gravelly. "Another little fox has come out to play!" he exclaimed, seemingly happy at it. "Tell me, little fox, what year is it?"
"1897," Tanjiro said, causing the demon to howl in anger. (I know that this isn't accurate just go with it for timing purposes which don't even matter)
"Sixty seven years I've been here!" the demon cried out, surprising Tanjiro quite a bit. "Sixty seven years since that stupid Hashira Urokodaki put me in this hellhole!" Now Tanjiro knew why the demon was calling him a little fox, he had the key warding mask of all of Urokodaki's students. "At least I've been able to take whatever revenge he gives me," the demon said, making Tanjiro realize what this demon had done. "Yes! I see it in your face, yes! That's right! I am the one who killed all of Urokodaki's students, I am the one who stopped their advance! Only that one pesky swordsman escaped, but he was nothing! He would have died had it not been for that peach haired one!" Tanjiro gritted his teeth, ready to run forward, when someone spoke to him.
Do not be so quick to anger, Percy told him, speaking for the first time in days. Tanjiro could feel a metaphysical hand on his shoulder, holding him back from lunging out of anger.
Percy? Tanjiro asked, confused. Where were you? Why weren't you speaking? What happened? Why did you- Tanjiro tried asking, but was cut off when his body was forced to the right in order to avoid three more hands, extended to make him Kamado puree.
Keep your eyes and ears on your opponent in a one on one duel, Percy said, not paying attention to Tanjiro at all. Do not let their movements go undetected, or you will have lost already. If not the battle, then lives.
True to his words, behind them, the boy that was tossed into the tree had died, bleeding out and blunt force trauma having done him in. Tanjiro's eyes widened and he started to tear up slightly, sorry that he let the boy die even after jumping into the fight, but Percy forced him to keep his head up.
The first rule of war is that you cannot save everyone. It is impossible to win a war without casualties, at least a war like this, Percy stated. Tanjiro felt his heart constrict. It was harsh, but it was true. So keep your head up, bite back those tears, and fight for your life.
Fight for my life, Tanjiro asked Percy, not getting a response, and looking forward. I can do that, he said as he smirked.
"It's the moment of truth, everyone," Akira stated, sitting atop a rock while the rest stood, with the exception of Mesio, who was sitting on the floor, watching at the front while the rest took positions around him in order of when they died. "Time to see whether or not we got someone new joining us."
"I do believe that is the question of the hour," an unfamiliar voice spoke, startling all but Sabito and Makomo, both of whom had heard it before. "However, I don't believe that the answer is yes."
6 feet 4 inches, with jet black hair and piercing green eyes, with clothes hung loosely off his skin and a bronze sword in his hand, Percy Jackson looked at all of the dead visages in front of him, remnants of a time long past.
"Who are you?" Ketsueki asked, still hiding behind his red scarf. "And what business do you have with our successor?"
"Dude, drop the voice and look, you're not emo or goth or whatever the fuck it is," Percy remarked, irritating people in his normal fashion. "And I'm Percy Jackson, the dead guy that's a voice in Tanjiro's head. Sabito, Makomo, good to see you again!" he exclaimed, waving his hand. Everyone blinked, and in unison, started screaming at him revolving around the general idea of 'how the fuck was he here', but he distracted them with the show of the fight starting. As the spirits leaned in closer, Percy disappeared, going to help Tanjiro with his fight.
Seven hands were launched at Tanjiro, each coming from a different direction, aiming to ensure that he couldn't get them all in one blow. However, he had the easiest way to destroy all of them by rushing into the middle of it. The hands essentially formed a circle around him, so Tanjiro dove into the center and sliced below him first, ensuring that there would be nothing to trip him up from there. Rushing forward, closing the distance effortlessly, he cut off the entire left side of the demon, allowing him to see the exposed neck. Before he could cut it, though, he was forced to step back by two hands from above, which he quickly sliced through. Looking back, he saw that the side he sliced had healed, once more creating the protective outer layer.
I'm just going to have to slice through it, Tanjiro thought, gritting his teeth and steeling himself for impending pain.
I'll defend, you attack, Percy told him, right next to where he was. Tanjiro looked Percy in the eyes and nodded, smiling, glad that someone would watch his back. Taking a deep breath and opening his eyes, Tanjiro smirked and charged forward.
"Is he suicidal or something?" Seiya shouted, even though everyone who could hear was in close proximity. "He rushed into a death trap!"
"Be calm, Seiya," Mesio spoke, the boy in question doing so almost immediately. "He has a plan."
"I'm willing to bet that it involves that guy we just saw," Sakura stated, Sabito and Makomo nodding.
"Blood will be spilt today," Akira stated, fiddling with a makeshift knife. "But who's will it be?" he asked, leaning his head back.
As the hands encircled him, Tanjiro calmed his racing heart and focused on the single target in front of him. He was vaguely aware of ice swords and lightning flying in front of him(had Zenitsu joined the fight?), but he focused on one thing, and one thing only: the opening thread. It pulled tight, connecting from the very tip of the blade he held to a single point at the neck. Trusting his instincts, Tanjiro knew that right there was the point he had to pierce, nowhere else would it work. Tanjiro launched himself upwards, getting gravity and momentum on his side as he swung down, easily slicing through the neck and outer layer of the demon with his water enhanced blade, decapitating it with the precision of a surgeon. Flesh and blood went flying everywhere as the demon's eyes widened in shock and surprise, unable to comprehend that it was about to die.
Each of the visages eyes' widened, reeling in shock at the events transpired.
"A single blow," Ketsueki muttered, before softly smiling. "I'll be damned. He did it."
"Yeah!" Tenko exclaimed, pumping his fist in the air. "He did it! We're free!"
"So it would seem," Seiya said, smiling. "I, for one, can't believe it."
"Is there anything you do believe?" Akira taunted, smiling once he realized it worked. "But yeah, he did do it. Let's go," he said, a serene smile on his face. "Let's go, and find a new place to live. Reincarnation doesn't sound so bad right now."
"I think I'd like to stay here a little longer," Sakura stated, holding a hand to her chin. "It'd be nice to see Urokodaki again, not to mention get to know the new kid."
"I'll stay too," Makomo said, Sabito nodding along. Mesio smiled and nodded, happy that he was finally free.
"Very well," he spoke, every head turning to face him, ignoring Tanjiro who was now holding the dead demon's hand. "I, personally, would like to rest. However, if that is your choice, you should go forth and do so," he said, smiling. Tenko, Ketsueki, and Seiya, as well as some others went, leaving only Sakura, Akira, Sabito, and Makomo standing there as the rest of the thirteen faded away into the sun, finally able to reach the plain of high heaven after being trapped for dozens of years.
"Well, looks like it's just us," Sabito stated, turning around to face where Tanjiro was.
"Thank you, Mr. Observant," Sakura laughed, happy at how Sabito bristled in anger. "But yeah, it is just us. Any plans for right now?"
"I say we stay with Tanjiro," Makomo said. "Watch him finish, then go with him to Urokodaki once more, and from there we can leave."
"As good a plan as any," Akira stated, putting his knife away for the first time since that day started. "Let's do it." And so, the ghosts dispersed, walking around the forest, each of them happy that they were free once more.
Tanjiro stood up from where he was kneeling by the hand demon's side. As the last of the corpse faded away into black and purple dust, Tanjiro clapped his hands and prayed to the Shinigami for a peaceful release into the afterlife. He couldn't explain it, but he knew that one was near, and that it was what took the soul of the demon elsewhere. Trusting the Shinigami to do right, Tanjiro unclasped his hands and sheathed his sword, which was laying still on the floor.
"There shouldn't be any more threats now that it's nearing the end of the last day," Zenitsu nervously said. "Right?"
"Likely true, but let's keep an eye out," Tanjiro said, hopping up into a tree. "Come on. Let's make sure nothing can get us."
"Alright," Zenitsu said, jumping onto the tree as well. "Hey Tanjiro?"
"Hmm?" Tanjiro asked, turning around to face Zenitsu, making him blush and stutter as he tried to get words out.
"I wanted to- what I want to say- please accept my," Zenitsu stuttered, trying to find the words for what he wanted to say.
"Hey, it's okay," Tanjiro said, putting a hand on his shoulder. "This is a safe space. Say whatever it is you want, and take all the time you need," he told Zenitsu with a smile, which was not helping matters at all.
"ThankyoufortakingcareofmeorelseIwould'vedied," Zenitsu rushed out, speaking so fast that nobody could comprehend it but Percy, who smirked.
"Sorry, I didn't catch that. Do you mind saying it again?" Tanjiro asked, still with a hand on Zenitsu's shoulder, his eyes furrowed in concern.
"Thank you for taking care of me during the final selection," Zenitsu said, not meeting Tanjiro's eyes. "I would've died otherwise," he finished, rubbing his arm. He then yelped as Tanjiro pulled Zenitsu into a hug, and melted as Tanjiro patted him on the head in true older brother fashion.
"It's something a lot more people should be doing," Tanjiro said, as Zenitsu now had his face on the older boy's shoulder. "Plus, you'd definitely be able to survive on your own. I've seen your speed!"
"Easy for you to say," Zenitsu muttered, his voice muffled by Tanjiro's shoulder. Pulling himself away despite how much he wanted not to, he smiled and looked up.
"Come on, let's make these last few hours count," Tanjiro said, grabbing Zenitsu's hand and ready to move.
"Yeah, last few hours," Zenitsu said solemnly, looking down, tears welling up in his eyes.
"Hey, don't worry," Tanjiro said, pulling the boy back into a hug. "I'm sure that we'll see each other again! I mean, demon slayers go on a lot of missions, so maybe we'll meet on one of those. After all, Japan isn't that big, right?"
"Yeah, but…" Zenitsu trailed off, tears falling, before burying his head once more in Tanjiro's shoulder. "I don't want to leave you! If you go, I'll die! I can't last alone! So stay!" he cried, hands desperately clutching at Tanjiro's clothing. Tanjiro smiled softly and pulled away from him, Zenitsu almost whining from the sudden loss of contact. However, the warm look in Tanjiro's eyes made him stop, and face Tanjiro, dried tears and some snot on his face.
"Well, if that's how you feel, I'll send a guardian angel with you," he said, ignoring Percy's sudden surprise. "He'll protect you until we meet again, don't worry!"
I never agreed to this! Percy yelled indignantly from his mind, Tanjiro laughing in the same region.
Suck it up and do it, Tanjiro told Percy, smiling both mentally and physically.
"Are you just making this up?" Zenitsu asked, rubbing his hands. "Because it's not funny. And I don't like that you'd think I'd fall for it."
"Zenitsu, do you trust me?" Tanjiro asked for the second time that week, and received a shy nod for the second time. "Then believe me when I say that no harm will befall you on your journeys."
"Alright," Zenitsu said, wrapping up their conversation as the first rays of the sun started to rise. "Well, then, I'll be seeing you around, Tanjiro."
"You too, Zenitsu," Tanjiro said, laying a hand on the other's shoulder. "Now, let's go to the meeting place and finish this," he said, before the both of them jumped across trees and parkoured back to the starting line.
"Congratulations on passing the final selection," the twins spoke in unison to the four remaining survivors, the fifth having rushed down the mountain before he could get to this ceremony. "We are pleased to announce that you five have what it takes to become full fledged members of the Demon Slayer Corps."
As they said that, Tanjiro was once again saddened by the fact that over fifteen people died within a 1km radius of him, and he did absolutely nothing to stop it. Then, he remembered Percy's words, and looked up.
But what if I could save everyone? I have the power, I have the means, I have the drive. So why can't I? Tanjiro asked himself, forgetting that Percy could still hear him, despite his visage being behind Zenitsu, who was slightly southwest of Tanjiro in turn. As the twins talked about ranks, the kid in purple started shouting at them because of him not getting a sword, so Tanjiro let that play out while Percy responded to him.
Tanjiro Kamado, do you remember the second titanomachy? Percy asked, Tanjiro vehemently nodding. How could he forget? It was the first time that he really saw actual bloodshed. Good. Now think about how strong I was back then and compare it to how strong I am now.
Alright, but where is this going? Tanjiro asked. True to Percy's words, there was a very big power and skill gap between his sixteen year old self and twenty year old self.
Now, swap every single monster there with a demon and Kronos as the worst demon, or the most powerful, Percy said. Then, multiply the degree of difficulty by three and you get standards for this world.
What? How is that possibly correct? You destroyed demons easier than monsters! Tanjiro protested, watching carefully as everyone got a crow. His crow rested on his shoulder, Tanjiro taking a moment to stroke its back before turning back to the kid in purple, still shouting at the twins. Also, Zenitsu got a sparrow, which was kind of funny.
Yeah, but you have to look at power scaling. I was better now than I was then. Tanjiro, you have to understand that if I left you, you would have zero chance against that hand demon, Percy stated. It's harsh but true. You are nowhere near the level you need to be if you want to actually stand up to the one that killed your family.
You assume he is more powerful than the rest, Tanjiro observed, carefully watching the guy in purple walk towards the kids to yell at them.
From my experience, the person with the ability to make new monsters is always the strongest. Also, it's likely a special capability of his biology. You know how Tomioka said that Nezuko turned because she was exposed to blood?
Yeah, what about- oh! So you mean that his blood has special properties?
Exactly, now go deal with that guy in purple, Percy said, directing Tanjiro's attention to the boy who just twisted one of the twins' hair, yelling for his sword. Tanjiro swiftly stepped forward and gripped the arm of the man with such strength that it felt like it would break.
"Take your hands off him," Tanjiro said, correctly stating the gender of the twin the boy in purple had his hands on. Said man scowled, and turned to Tanjiro.
"Or what? You'll break my arm?" he asked, likely rhetorically. However, Tanjiro didn't take it that way, and proceeded to do just that, through a combination of turning it in the right direction and applying enough force. The bone in his forearm snapped in two, and his elbow became dislocated once Tanjiro pulled back.
"Ow! What the hell was that?" the boy howled, clutching his arm in pain.
"I broke your arm, just as you requested," Tanjiro replied, using Percy's training to the max. Persasseus Jacksasseon was back, bitches, and there was no stopping him.
"You bitch!" the man in purple cried, stepping back. "Are you dumb or something?"
"No, but being near you makes me lose brain cells by the second," Tanjiro replied, causing the man to bristle in anger and then reluctantly step back. While he did that, he turned to the kid that was grabbed. "Are you alright?" Tanjiro asked, looking down at the boy.
"Yes, thank you for asking. Now, if we could proceed?" the boy responded, as Tanjiro walked back towards Zenitsu and his crow.
Nice, using my second best trait against your enemies, Percy told Tanjiro, causing the younger to stifle a chuckle.
What's number one? Tanjiro asked, rolling his eyes.
My fashionably good looks, of course, Percy responded, sounding hurt that Tanjiro didn't even acknowledge that he was handsome. Tanjiro once again had to physically stop himself from rolling his eyes at this, something Percy could feel and scoffed at.
"Now, you will pick your nichirin for your swords," the girl stated, as she directed their attention to a table that had been set up at the edge of the clearing. "The ore that you pick is the one that will be infused into your sword, to allow you to truly kill demons."
"What do we pick? There's no difference between them," Zenitsu said, before Tanjiro closed his eyes and focused. He detected different patterns from each of them, some more finely detailed than others. Quickly zoning in on two, he grabbed both and handed the one in his left hand to Zenitsu. Walking to the kids, the two placed their ores on the tray provided.
"We choose these," Tanjiro said, causing the kids to smile.
"A wise choice," the two stated in unison, nodding and setting the tray down. "Good luck on your journey," they bid the two, as they departed from the site of the final selection for the first, but not the last time.
For the large part, the journey back home was peaceful. A mere seven hour walk, Tanjiro took the time to enjoy the scenery, including the variety of sounds and the sweet scents of nature. Without Percy's presence to talk to, the boy having taken his job as Zenitsu's bodyguard seriously, it was kind of lonely, but Tanjiro made it count. Stopping every so often to look at something or enjoy the tranquility of a free time he didn't often have, Tanjiro had a permanent smile on his face as he walked. It wasn't a big one, like one would see after he laughed, but a much better one, one that displayed a good contentment with his surroundings, peaceful as they were.
It was one one such break that he noticed the air wavering and shimmering near him, seemingly walking around as he sat under the shade of a tree, enjoying the shade and the wind. Narrowing his eyes, he got up, ready to leave, observing how the shimmering air followed him and acted. Once more regretting not getting Percy to teach him how to sense his surroundings, Tanjiro walked forward, noting the positions of each of the four ripples in the solid air.
"I know you're there," Tanjiro sighed, speaking up once he ensured that the mirages were following him. They jumped from one place to another, proving it wasn't just his vision. "So please, show yourself."
"An astute observation," Sakura said, becoming visible, the rest following soon after. "I'm Sakura. Nice to finally meet you, Tanjiro Kamado."
"Keep it at Tanjiro, I don't want dead people using formalities with me," Tanjiro replied, seemingly tired with life in general now. How did he know she was dead? Easy, she had the same look as Percy. "Hey, Sabito, hello Makomo," he greeted the others who had appeared, however there was a third. "And who might you be?" he asked, as the aforementioned two waved at him.
"Akira," he stated, his head held high as he stared down at Tanjiro from where he stood, slightly leaning on a rock.
"Nice to meet you," Tanjiro gestured, before sitting down. "By the way, what's with the rocks?"
"They seem cool," Akira shrugged, getting off of it and walking forward. "What's with the creepy old dude with you all the time?"
"Oh you mean Percy?" Tanjiro asked. "He's dead, and asked to stay with me. I said yes because he fights well. Not much too it." Akira laughed and clapped Tanjiro on the shoulder as best he could.
"I like this kid," Akira said to the rest, smiling. "Come on. Let's go see Urokodaki."
"Alright," Sakura said, sauntering forward, dangerously close to Tanjiro. "Let's go."
"So what you're saying is that the demon turned after eating you?" Tanjiro asked Akira, having learned some more about his backstory.
"Yeah. It was kind of hard fighting him, though, because he had the best regeneration I'd ever seen on that mountain, after killing seven others that day," Akira responded, a grim expression on his face. "But hey, you killed him, so everything's alright, right?"
"Yeah, don't worry," Tanjiro said, instinctively reaching out to pat Akira on the head, doing so without even noticing it. However, as soon as he did, Akira stopped and looked at him. Tanjiro also stopped, confused. "What?"
"Your hand didn't go through me," Akira stated, looking at his hands, and then back at Tanjiro, before muttering something shyly.
"What was that?" Tanjiro asked, as the two continued to walk. "I couldn't hear you."
"Could you do that again?" Akira said, looking down. "I haven't felt physical contact in so long, and I was wondering if you could help me, since you're able to."
"Of course!" Tanjiro exclaimed, reaching out to brush some of Akira's jet black hair, allowing him to see his face. He continued the motion as he walked, Akira unconsciously leaning into his touch as the group of five continued to walk towards Urokodaki's house, the final path to which had just come into vision.
"Here we are," Makomo said, while Sabito followed her. "Ready to see him again?" Everyone nodded. "Great, then let's-"
Makomo was cut off by the door bursting open, and a young girl walking out, a very noticeable bamboo muzzle in her mouth, with cute pink eyes.
"Demon!" Akira called out, unsheathing his sword, ready to dash forward, when Tanjiro rushed forward, beating them all in speed. Before all their eyes, Tanjiro hugged the demon, nearly crying as he saw her awake.
"Nezuko!" he cried out as Nezuko leaned into him, closing her eyes and relaxing against her older brother. "Nezuko, what happened? You fell asleep for several months, why?" he asked, holding her face with both hands. Nezuko let out a series of muffled grunts and hums as she did her best to respond, Tanjiro smiling while the rest rushed forward.
"Tanjiro, you are aware that that creature is a demon, right?" Makomo asked tentatively.
"She is not an it," Tanjiro growled, standing up, Nezuko peeking out from behind him. "She is my younger sister."
"Yes, but she is a-" Makomo tried to protest, but was cut off by the wrath of an older brother.
"I was unable to save her from this fate," Tanjiro said, looking murderous. "I will not let her die without knowing I did everything that I could."
"Alright," Makomo said, backing off. Just then, Urokodaki walked out, wondering where his friend the demon was. Staring in shock at the semi-transparent forms of four of his students, the still living form of one, and the said demon hiding behind her older brother, Urokodaki did the only sensible thing when faced with four dead people and a demon.
He fainted.
"Urokodaki!" five voices cried out, rushing forward to catch him.
"Everything should be ready," Tanjiro said, hoisting the box that Urokodaki made for Nezuko onto his shoulders. His sister was inside in her child form, sleeping to regain her energy. After receiving his Nichirin sword from Hanagezuka, a crazed but skilled swordsmith, and the blessings of the spirits, Tanjiro was ready to leave.
"South-southwest!" his crow cried out from above, as Tanjiro looked at it with Urokodaki. "Head south-southwest and stop the demon eating young girls in the village!"
"Got it," Tanjiro said, beckoning his crow down and stroking its feathers. "Well, I guess this is where we depart," Tanjiro told Urokodaki, bowing in gratitude.
"Yes. Go, Tanjiro Kamado, demon slayer," Urokodaki said, returning the bow. Waving goodbye, Tanjiro walked away, ready to take on his first mission as a full fledged demon slayer.
He was ready.
Bit of a longer Author's Note this time, gonna touch on three subjects.
First, I will be editing during these next two weeks, which means that I will not be working on any of my stories. I feel like this will help me produce quality content better, and allow the story to flow smoothly along with filling up any and all plot holes. Edits will be timestamped in a section below the bottom author's note, so keep an eye out for those.
Second, I will be deviating a lot from canon. It's been sort of clear since I started this story, but it will become even more clear leading up to Mt. Nagamoto, after which canon will likely be destroyed with a canon ball(note intentional misspelling for comedic purposes). However, I'm not sure what I will do, I only have a really basic plan in mind going forward.
Finally, this story is going to feature a stupidly OP Percy/Tanjiro character. Once again, it's kind of clear now, but I do have a lot of things I will do to make it clear just how broken Percy is in the Demon Slayer world. First off, his skill. Percy has been fighting monsters for eight years in this story, before dying. Adding to that, he has tied with, and occasionally beaten beings on the level of Titan, Giant, and Primordial in fights, meaning that he has some serious skill. For this skill alone, he is already Hashira level(around Muichiro is the benchmark right now). Then, his godly genes give him increases in strength, speed, and stamina, giving him better physical traits than basically every human and most demons short of strength based twelve Kizuki. Finally his powers. Complete control over water and its forms is the main thing, already making him a threatening ranged and close combat fighter with the wide variety of ways he can use it. Then, his domain over storms extends to rough control over wind and lightning, something I intent to work on until it's polished. The Earthshaker abilities give him extreme destructive capabilities, and I have ways that I want this to manifest in the story. Now, these are all from Percy. Now, let's get into Demon Slayer powers. Obviously, total concentration breathing increases his strength, speed, and stamina. Next, water breathing helps his hydrokinesis and sword skills. Ice breathing is something I will play around with, which obviously would be a combination of incredible defense and ranged offense, something he normally lacks. Finally, Sun Breathing is stupidly OP and I plan on abusing it and the perks to the max. So yeah, if you don't want a God Killer rampaging through small fry like Upper Moons, prepare to leave soon.
Have a good day, everyone!