After several attempts on nearby trees, he came to a conclusion.
"Although the Chakra infused with Wind will explode, that's not what causes the damage. The damage is caused by the Wind, which becomes lethal after the explosion. They can cause many cuts, some of which can be very deep."
Feng Zheng tried to inject more Chakra to enhance the explosion's power, but it didn't work because the Wind Ball couldn't move that fast or that far.
Even if he increased the amount of Wind to maintain the Chakra to Wind ratio, the sphere still became very cumbersome and no longer had the same speed.
He sighed, thinking.
"Upgrading it is a very complex task. However, I should change my perspective. Perhaps I should try to combine this Ninjutsu with the Wind Clone. If the Wind Clone can unleash such power, it will become a fatal blow."
The practice of Wind Blast Technique lasted for a week.
After the first day, Feng Zheng stopped improving the Wind Ball and focused on increasing its formation speed and launch speed.
His goal was to be able to continuously launch these exploding balls without interruption.
This way, although it wouldn't be a fatal blow, it would still cause considerable damage to those who couldn't dodge or block these balls.
It could also lead to death from excessive blood loss. However, he was still far from that stage.
On the second day, he began to learn Gale Technique. The task here was to gather Chakra in his hand and unleash it in one direction.
That burst would exert an opposite force on him, causing him to move in the opposite direction. This technique can be used to quickly change direction.
However, in terms of movement on land, this move was far inferior to Body Flicker Technique.
Its advantage was that when the user's feet were not on the ground, this Ninjutsu would be very convenient to use in the air.
Due to his training over the past month, creating a burst was very easy. The problem was controlling the amount of his movement.
In addition, his footwork also needed a lot of adjustment. To use this Ninjutsu, your footwork must be very light, allowing yourself to be pushed back by the burst.
Although Feng Zheng could control the power of the burst, the force exerted back would vary depending on the amount of pressure applied to the foot. This was very difficult to control.
On the third day of training, he successfully circumvented this problem with two strategies.
The first was that he would jump slightly in the direction he wanted to go, and then use the burst to propel himself there.
The second was to use the burst, and then instantly lift his feet off the ground, allowing him to dodge.
However, the control of the second method was still lacking a lot. This would cause him to flip several times in the air, which could be very dangerous in combat if the enemy pursued and continued their attack.
He trained for six days to improve his control over this Ninjutsu, after which he was satisfied with his progress.
After dinner that night, he decided to sit down and think about his current situation. He thought to himself.
"In these thirty-two days, I have learned five E-rank Wind Release Ninjutsu and five D-rank Wind Release Ninjutsu! Plus three Basic Ninjutsu, Body Flicker Technique, and Shadow Clone, I now master a total of fifteen Ninjutsu."
He further analyzed his Ninjutsu and came to a conclusion.
"My Wind Clone makes the ordinary Clone Technique redundant. I should completely abandon its use. Gale Technique also no longer needs continued practice; it can already sufficiently mask footsteps, and in combat, Breakthrough Technique is much better."
Thirteen Ninjutsu remained. Although Feng Zheng had learned them, if it came to truly mastering a Ninjutsu, he might have only mastered one, and that was Body Flicker Technique, which he had spent ten whole months on.
Next, Feng Zheng would focus on mastering these Wind Release Ninjutsu. Especially casting them without Hand Seals.
Although Body Flicker Technique took ten months to master, if he learned anything in this month, it was either that his Wind Release talent was extremely high or these Wind Release Ninjutsu were very simple. So mastering them shouldn't take too long.
Feng Zheng could also upgrade his Substitution Technique by replacing it with his Wind Clone instead of nearby wood or other objects.
In addition, he could also try combining Wind Clone and Wind Blast Technique.
Similarly, he could also try using Body Flicker Technique and Wind Push Technique simultaneously. If Body Flicker Technique could change direction at will, it would be extremely lethal.
Moreover, Feng Zheng also needed to learn to reinforce his weapons with Wind Chakra.
After thinking about these, Feng Zheng decided to consider how to obtain C-rank Ninjutsu. He thought.
"I'm not sure if I can quickly obtain C-rank and B-rank Ninjutsu. I could ask Genshu, but even if I succeed, I don't think he would give me more than 2 or 3 Ninjutsu. And that would also attract a lot of attention."
Feng Zheng felt he could ask Hiruzen for permission to enter the higher sections of the Library after the third-year exam.
But he wasn't sure if Hiruzen would agree, and even if he did, Feng Zheng's entry into the Library would likely be monitored.
If they saw him reading those advanced Ninjutsu, they might send someone to monitor Feng Zheng.
That also meant Feng Zheng could no longer secretly cultivate Ninjutsu as he did now.
If they sent someone powerful enough to monitor him, making it impossible for Feng Zheng to sense them, it would mean his skills would soon be known to Hiruzen and Danzo.
He sighed, thinking.
"Forget it, it's safer to be cautious. There's no need to take such a big risk. If I master all my current Ninjutsu and also learn some Earth Release Ninjutsu and can't develop further, then I can consider early graduation."
Over the past year, he had thought a lot about early graduation. His thoughts were.
"Originally, I thought early graduation would attract a lot of attention. Perhaps it's still the case in Naruto's generation. But now, early graduation seems to be strongly supported and even encouraged by the teachers."
"In the past two years, many people graduated in their fourth or fifth year of school. Some even graduated after their third year. I guess the Village hopes to have new Ninja join their ranks as soon as possible. That's why early graduation might be encouraged now. However, if someone graduated at six or seven years old, it would still attract a lot of attention."
During this holiday, Feng Zheng devoted almost all his energy to Ninjutsu.
His daily routine was to exercise in the morning, then train in Ninjutsu all day. When Chakra ran out, he would Meditate or throw Shuriken; everything else stopped.
Feng Zheng decided to continue practicing Wind Release Ninjutsu during the last week of the holiday. At the same time, he started additional training.
He began to try attacking his Wind Clone with Shuriken to improve his skills.
However, he didn't know whether to be sad about his Shuriken throwing technique or happy about the speed and mobility of his clones, because he didn't hit his Wind Clone even once! But he did improve very quickly.