"Alright!"
After releasing his Ninjutsu, Jiraiya looked at Naruto again and asked with a smile, "Did you see it clearly?"
"Yes!"
Naruto's eyes were bright, and he nodded confidently, quickly forming hand signs according to Jiraiya's sequence, then opened his mouth and exhaled forward.
Boom! ~
Scorching flames spewed out from Naruto's mouth, gushing like a giant fiery dragon, roaring as if to incinerate everything in its path.
"This—"
Jiraiya stared blankly at the Fire Release Naruto unleashed, not because Naruto's fire dragon was several times more powerful than his own, but because Naruto had learned Fire Release in just one try.
This made Jiraiya begin to wonder: could this kid's natural Chakra nature be Fire, not Wind? Or perhaps a combination of Wind and Fire?
"Very good, again!"
Jiraiya, not believing it, clasped his hands together and stared at Naruto, saying, "Next is Water Release. Watch carefully—Water Release: Water Dragon Bullet!"
Surging water spewed from Jiraiya's mouth, transforming into a massive water dragon that soared into the sky!
"Water Release: Water Dragon Bullet!"
This time, without Jiraiya needing to say anything, Naruto, after watching him release the Ninjutsu, immediately formed hand signs and cast the technique, then spewed an even larger water dragon, leaving Jiraiya stunned.
"Again!"
Jiraiya still didn't believe it and continuously demonstrated Earth Release and Lightning Release to Naruto.
The result, naturally, was no exception; Naruto immediately released the same technique after he finished, and with even more astonishing power.
"This..."
Jiraiya looked at Naruto, who had just mimicked all five elemental Ninjutsu, and his expression was incredibly colorful.
Then, unwilling to give up, he asked, "Among the Ninjutsu you just used, which one consumed the least Chakra?"
Through the previous test, Jiraiya was completely unable to discern Naruto's Chakra nature, or even judge it, because every technique this kid released was equally powerful, making it impossible to tell which was stronger with the naked eye.
"Ah!~"
Naruto paused when he heard Jiraiya, then thought for a moment and said, "It seems—they're all the same."
"Impossible!"
Jiraiya glared at Naruto upon hearing his words and said, "Even a Ninja with all five natures will definitely have a difference in Chakra consumption when using Ninjutsu of different natures, unless—"
"Unless what?" Naruto immediately asked.
'Unless the techniques just released consumed too little Chakra for Naruto to even notice,' Jiraiya thought to himself, and the more he thought about it, the more plausible it seemed.
Other Ninja might even notice Chakra consumption when using the Replacement Technique.
But with Naruto's Chakra reserves, releasing Ninjutsu of that level probably really wasn't a noticeable consumption for him, which is why he couldn't judge the amount of Chakra consumed by each technique.
After all, this kid's Chakra is of such magnitude that even using one hundred Shadow Clones to refine Chakra simultaneously would take an hour to deplete it; a few Five-Element Ninjutsu probably truly caused imperceptible consumption for him.
It must be like this!
However, even so, with Naruto's talent to learn and release any elemental Ninjutsu just by seeing it once, testing his Chakra nature was completely unnecessary.
Minato and Kushina really gave birth to a terrifying little monster!
Jiraiya sighed inwardly, then looked at Naruto and said, "It's nothing. Since you can use Ninjutsu of all five natures without any hindrance, and the Chakra consumption is the same, then there's no need to continue the nature test. We'll move directly to the next step."
"Huh? Oh!~"
Naruto was startled, then eagerly asked, "Jiraiya-sensei, what's the next step?"
"Of course, it's the combined use of nature transformations."
As Jiraiya spoke, he suddenly clapped his hands together, then pressed them to the ground, and the hard ground immediately turned into a soft, muddy swamp.
"Wow!~"
Naruto's expression immediately showed admiration when he saw the change in the ground.
"This is Earth Release: Swamp of the Underworld."
Jiraiya stood up, looked at the swamp he had created, and said proudly, "By combining Earth Release and Water Release, you create a huge swamp, trapping the opponent so they cannot escape until they are submerged. This is the effect of combining Ninjutsu of different natures."
"So cool!"
Naruto's eyes lit up upon hearing this, and he immediately prepared to try it himself, but Jiraiya stopped him.
"You don't need to try; this technique isn't suitable for you."
"Huh? Why?" Naruto stopped his movements and asked curiously.
'If you use this technique, this area will probably become a restricted zone!'
Jiraiya muttered to himself, then looked at him seriously and said, "Because you have a better technique to try."
"A better technique?"
Naruto immediately became interested and pressed, "Quickly tell me, what technique is it?"
"Of course, it's Rasengan!"
Jiraiya raised his hand and condensed a Rasengan in his palm, then said to Naruto, "I should have told you that this technique developed by your father is still incomplete, because Rasengan is a technique that can incorporate any elemental nature transformation—just like this."
As he spoke, a burst of flame suddenly erupted from his palm, merging into the Rasengan in his hand, instantly turning the blue Rasengan into a burning crimson one, which he then threw toward the swamp ahead.
Boom! ~
The burning Rasengan exploded in the swamp, and then, with the fire fueled by the wind, it formed a burning tornado, raging and swirling in the swamp with astonishing power.
"So cool!"
Naruto's eyes widened as he watched the fiery tornado swirling in the swamp, and he exclaimed, "I want to learn that!"
"Haha, impressive, right?"
Jiraiya smiled proudly, then said, "The combination of Fire Release and Rasengan is just one of the forms of Rasengan transformation. You can also try adding Chakra of other natures into the Rasengan. Just like I said before, Rasengan is a powerful Ninjutsu with infinite possibilities!"
"Mhm. I understand!"
Naruto nodded heavily after hearing Jiraiya's words, then immediately began trying to develop new Rasengan forms.
Adding nature transformations to the Rasengan is equivalent to creating an entirely new technique, so Naruto's talent for learning Ninjutsu doesn't apply here.
Especially when adding nature transformations of other natures into a Rasengan, which is based on Wind Release, it is difficult. Naruto can only rely on continuous trial and error.
Fortunately, Naruto has ample Chakra, which can support his hundreds, or even thousands, of attempts each day.
If it were a Ninja with less Chakra, they would be exhausted after forming a few Rasengan each day, and it would take an unknown amount of time to develop new Rasengan forms.
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