To be honest, it wasn't that Kevin didn't trust Bisky.
It was just that in his understanding, the results of physical training would inevitably be reflected in one's appearance.
A strong and resilient physique usually exhibits perfect muscle lines and a robust build.
Although this world had Nen Ability, it had not deviated from basic physical rules.
Therefore, with Bisky's current appearance and physique like a young girl, it was really difficult for Kevin to believe that she had reached her physical limit.
Although Bisky's body proportions were perfect and there were signs of training, she didn't look like she had reached the limit at all.
Perhaps she had only reached the limit state that could be presented in the form of a young girl.
It was even more likely that she used her Nen Ability to disguise herself.
If that were the case, Bisky's original appearance should be something not to be thought about, not to be thought about.
Facing Kevin's doubts and confusion, Bisky clearly had no intention of explaining, and even didn't allow Kevin to continue asking.
Wing was also present at the time and remained absolutely silent about this.
However, Kevin didn't pay too much attention; he was more concerned about another question.
Regarding this question, Bisky answered, "Relying solely on self-training, this limit is indeed difficult to break through. But this world is vast and boundless; relying solely on one's own strength is certainly not enough, but with the help of external forces, it is possible to break through."
"Take your potions, for example. If you can obtain the most top-tier materials, I believe you have the ability to create potions that can break through limits."
Hearing this, Kevin nodded in agreement, but the problem was that he currently had no such materials at all.
Then, Kevin seemed to understand something, and silently glanced at Bisky; the two understood each other tacitly and stopped discussing the topic.
Indeed, someone as experienced as Bisky couldn't possibly not know about the existence of the [Dark Continent].
Bisky was so certain that the Dark Continent had materials to break through limits, did the Hunter Association have relevant records?
Or had the Hunter Association actually been to the Dark Continent?
Kevin couldn't answer this, as he knew very little about this area, only having heard bits and pieces from Jin.
But in any case, Bisky developed a training plan for Kevin.
"Although with the aid of potions and training, you cannot further strengthen your physical fitness. But your physical fitness is already close to the limit, which undoubtedly lays an extremely solid foundation for you."
Kevin indicated that he understood this.
"So now, you should shift your focus to other areas, such as improving speed, flexibility, and agility. These cannot be achieved solely through physical fitness training."
"Furthermore, you need to tap into your potential inwards; your Nen capacity is severely mismatched with your physical fitness. With your current physical fitness, increasing your Nen capacity several times or even ten times is not a problem."
"Nen capacity is closely linked to physical fitness; although they are not perfectly matched, they profoundly influence each other."
Simply put, Kevin's body had become a container whose capacity was close to the human limit, but within the container, the liquid called "Nen" only occupied a thin layer; he needed to fill it with more Nen.
Finally, Bisky's plan for Kevin was that at this stage, it was best to use potions for training once every five days, or even once a week.
His physical fitness no longer needed excessive strengthening; the foundation was already solid. What needed to be done now was to let this body, close to its limit, achieve results in other aspects.
Otherwise, no matter how strong your physical fitness is, if your Nen capacity is insufficient, you won't be able to withstand a punch from someone else.
At most, you'll just be more resistant to being beaten than others.
Currently, Kevin only had two types of potions that were effective for training.
[Digestion Potion] could improve physical fitness through large amounts of eating and intense training, but it was limited to that.
This potion had no effect on flexibility, agility, speed, or the amount of Nen within the body.
But without a doubt, this potion could bring about an incomprehensible speed of physical fitness improvement.
When officially opening for business, perhaps this potion should be separated into a regular version and an enhanced version.
His current knowledge of potions allowed him to do this.
The scheming merchant thinking in Kevin's mind began to stir.