Over the next few days, Oboro began to train Charles. In addition to teaching him the practice of Nen, he also taught him fighting skills that matched Charles' aptitude for external martial arts, along with two relatively simple breathing methods: static breathing and abdominal breathing.
Oboro couldn't teach too much in just a few days. Besides, the more he taught, the harder it would be for Charles to digest and understand. Oboro only taught him how to get started, how far he could go in the future was up to him. As the saying goes, a master can only lead you to the door, but the practice depends on you.
Even with only two breathing methods, a few fighting skills, and some knowledge of Nen, it was enough to begin Charles' transformation. However, he still needed to refine himself by fighting in the Sky Arena and integrating the skills Oboro had taught him into actual combat.
Oboro set a goal for him: to continue to hone himself in the sky arena for one to two years, and then take the hunter's exam when he became a floor master. Maybe this time would be longer, maybe three to four years, or even five to six years, depending on the person. But before he could join the Hunters' Association, he had to become a floor master.
The next day, Oboro went out to buy food.
Staying in the room every day to teach Charles was quite boring and tiring. He found that he did not have the same temperament and interests as Wing and Biscuit. He preferred to be a hands-on teacher. When Charles failed to understand some key points of martial arts, Oboro would become impatient after repeating them several times. He felt that he wasn't a good master and didn't seem very qualified for the job.
Anyway, it depended on Charles's own understanding. He could learn as much as he could. Oboro had always been surrounded by people with extraordinary talents or great strength. It was a bit of an adjustment for him to suddenly teach someone like Charles. If he had taught Gon and Killua, the two children would have understood in no time. That was the difference.
"Hm?"
Oboro was walking down the street with a bag, preparing to return to Heavens Arena. He was eating a piece of bread when he suddenly stopped and witnessed an interesting scene.
On the street in front of him, Hisoka was confronted by someone. The two seemed to be having a tense conversation.
"Well, can you step aside? I have no interest in you anymore," Hisoka looked at the long-haired man with a serious face and smiled weakly.
"Promise to fight me!" Kastro repeated, his posture tense and determined.
"Don't you understand? You have no spark left to interest me," Hisoka held out his hand, a card already between his fingertips, his eyes wicked. "Get out of my way" A hint of murderous intent radiated from Hisoka.
"Hey, it's not nice to kill people on the street. Even if the fruit is rotten, you planted it. How can you just throw it away? At least find a place to bury it" A voice suddenly interrupted the conversation between the two. Hisoka heard it and knew immediately that it was Oboro.
Kastro also turned to look at the man in the suit who was approaching.
"Hehehe" Hisoka put aside his murderous intentions, his lips curling into an amused smile.
"Who are you?" Kastro frowned, scrutinizing the newcomer.
"Don't worry about me," Oboro smiled and stuffed the remaining half of the bread into his mouth, waving his hand dismissively. "How about I make a suggestion? Since you want to fight him, why don't you find a place where no one is around and solve it in private? After all, your goal is to defeat him and take revenge, so don't waste any time."
Then Oboro looked at Hisoka again. "The sooner you solve it, the sooner it'll be over. If you don't accept his challenge, he will continue to harass you, it's very annoying, isn't it?"
"Yes, it is." Hisoka nodded, his golden eyes gleaming with interest.
"I'll be the referee!" Oboro volunteered.
After that, Hisoka went first. His meaning was very clear: Just do what Oboro says.
Kastro also realized that the person in front of him knew Hisoka and since Hisoka agreed, he had no reason to refuse. He was sure that he could defeat Hisoka!
He nodded curtly, turned around with a dramatic sweep of his cloak and followed Hisoka's footsteps.
Oboro took a bottle of juice out of his bag, opened it and drank it slowly before following them.
Although it was called revenge, there wasn't really any deep hatred between Kastro and Hisoka. When Kastro first entered the 200th floor of the Heaven Arena, he lost to Hisoka in his first fight, but he managed to score three points against Hisoka, which made the magician admire him and deliberately let him live. Now, after two years of intensive training, Kastro had challenged Hisoka again. But it wasn't entirely true to say that there was no animosity between the two.
Judging by Kastro's obsession with Hisoka, and Hisoka's character, he might have said some particularly harsh things to Kastro during that battle, his way of adding some 'fertilizer' to the seed.
Kastro was very famous in the Heaven's Arena, and this time, upon his return, he had shown amazing fighting power and was praised as someone with an ability close to that of a floor master. But in reality, his ability had reached the level of a floor master at least among the 200th floor fighters, which would have been enough to become a floor master in a weaker era.
Otherwise, it would have been impossible for him to seriously injure Hisoka in the original timeline.
Unfortunately, the current Hisoka was no longer the same as in the original timeline.
It was precisely because of Kastro's increased strength that Hisoka had lost interest in him. An opponent who was too weak would not stimulate the fruit farmer. There was nothing exciting about it.
Since Oboro was free anyway, he might as well add some spice and flavor to his life. If he hadn't appeared, Hisoka really would have killed Kastro in the middle of the street.
Half an hour later, the three men arrived at a fighting arena and paid for the booking.
Charles was also summoned by Oboro.
When Charles arrived, Hisoka and Kastro, who had removed his cloak, stood facing each other. Oboro sat on the bench in front of the court and continued to drink juice.
"This is," Charles looked at the two people who were about to fight, and his expression suddenly changed. Since both of them were 200th level Nen users, he knew the names of Hisoka and Kastro very well. He had even met Kastro and watched his fights.
"Sit down and watch," Oboro pointed to the empty seat next to him.
"Okay." Charles sat down nervously, his eyes wide with anticipation.
"Kastro is also a Nen user of the enhancement type, and his physical strength is extremely formidable," Charles said, watching the fighters prepare.
"How long do you think the fight will last?" Oboro asked.
"It will take at least half an hour," Charles hesitated.
In his opinion, the strength of Kastro and Hisoka should be equal. It was known that Kastro had been defeated by Hisoka before, but judging by his current performance in the Heavens Arena, they should be about equal. In addition, Kastro was an Enhancer, which gave him a natural advantage in raw power.
"I asked you to come here because I hope you can watch this fight closely," Oboro said, slurping his juice. "For you, this level of combat is rare. You should concentrate on Kastro. I'm not asking you to learn his strengths, but to find his weaknesses."
"Fighting?" Charles took a deep breath. "A fight to the death?" He had thought it was just a sparring match.
"You are also an Enhancer, so you have to find out the reason why he will be killed," Oboro looked into Hisoka's eyes and continued. "I won't give you much time, maybe less than a minute."
In less than a minute, Kastro will die? Charles swallowed hard. He believed in Oboro's judgment, but this prediction sounded too incredible. Was the gulf between the two people on the arena floor really that great?
After exchanging a few last words with Hisoka, Kastro ended the conversation and took up his position.
Oboro put down his empty juice bottle and announced with a smile: "This fight has no rules and no points. The only goal is to kill your opponent!"
"Now that we are all ready," he raised his hand, "let us begin"