The Kageyama family training ground was located within an enclosed forest.
For an ordinary person, walking there would be exhausting, but for a ninja, the distance was just right.
Kageyama Kogetsu led Sasuke and Naruto, skipping and jumping, to the center of the training ground. The sun was a bit harsh, but for ninja, it felt fine.
"Sasuke is older; he's the big brother. I'll teach Sasuke first."
Hearing this, Sasuke gave Naruto a smug look. Naruto rolled his eyes at Sasuke, muttering inwardly about what a show-off he was.
"The ninjutsu I'm teaching you is the Lightning Release technique your teacher Kakashi created himself at age twelve—I think it was twelve—Chidori."
"This technique involves both chakra nature transformation and shape transformation."
"The specific method is to gather Lightning Release chakra in the palm to form a high-intensity current, making the hand like a divine weapon with extremely strong piercing power."
"It gets its name from the sound it makes, which resembles the chirping of a thousand birds. Like this."
Kageyama Kogetsu raised his right hand. His palm was instantly enveloped in brilliant white lightning, and blue-white arcs of electricity danced around his hand as the center. A loud chirping sound echoed through the forest.
"So cool!" Sasuke and Naruto couldn't help but widen their eyes, exclaiming in unison.
Although the two had seen Kageyama Kogetsu and Kushina fight like gods, that was from a distance with binoculars. Experiencing it up close was a completely different feeling.
"The weakness of this technique is that you need to rush towards your opponent when attacking. Because of the high speed, you might not be able to see the enemy clearly and be vulnerable to a counterattack."
"It needs to be used in conjunction with the Sharingan to be most effective. And Sasuke, you happen to have the Sharingan. This technique is a perfect fit for an Uchiha clan ninja with awakened eyes and a Lightning Release affinity."
"Once you've mastered Chidori, you won't need hand seals, and the weakness will be gone. It will have considerable power even at close range."
"Now, let your father demonstrate."
As his voice fell, Kageyama Kogetsu's figure moved, thrusting forward. Wherever the Chidori passed, tough tree trunks were like rotten earth, easily pierced through.
"Father, that's too cool! I have to learn this!" Sasuke said with great enthusiasm.
"Hahaha, is the technique cool, or is your father cool?" Kageyama Kogetsu laughed heartily.
"Both are cool, both are cool! But if I have to compare, Father is cooler when using the technique," Sasuke said, nodding like a chick pecking at rice.
"Haha, I didn't dote on you for nothing," Kageyama Kogetsu said, patting Sasuke on the head.
Naruto sighed, "Aww... it's a shame my chakra nature isn't lightning. I can't learn this technique."
"Don't be discouraged. The technique I'm teaching you may not be as flashy as Chidori, but its power and potential are in no way inferior."
"What technique is it?" Naruto's mood changed quickly. He lifted his head and asked excitedly.
"Rasengan."
"This technique was inspired by the Tailed Beast Bomb and was developed by your biological father, the Fourth Hokage, and his teacher, Lord Jiraiya, over three years for your mother."
"Therefore, your mother knows it too. You can ask her if there's anything you don't understand."
"The specific method is to concentrate chakra in your hand, making it flow in irregular directions and then compressing it to form a palm-sized sphere of non-elemental chakra."
"Like this."
Kageyama Kogetsu raised his left hand. Blue chakra rapidly gathered in his palm, soon forming a small blue sphere.
"Chidori inflicts piercing or cutting wounds. Rasengan inflicts twisting wounds."
As he spoke, Kageyama Kogetsu pressed the Rasengan in his left hand against a tree trunk. The trunk instantly caved in, the wound showing a spiral pattern.
Boom! After taking two heavy hits, the large tree could no longer withstand the abuse and crashed to the ground, kicking up a cloud of dust, leaving only a stump behind.
"Alright, this is great! I feel like it's perfect for me," Naruto said with a huge smile.
"That's right. This technique is very suitable for you, or more accurately, for any ninja with a large amount of chakra."
"Increase the chakra output, and it becomes the Giant Rasengan. Decrease the chakra output, and it's a mini-Rasengan."
"Add Wind Release nature transformation, and it becomes Wind Release: Rasengan. Like this."
Kageyama Kogetsu once again formed a Rasengan in his left hand. The difference was that this one had four small, brilliant white wind blades on its edge, and a low hum emanated from it...
"If you then add Wind Release shape transformation on top of the Wind Release: Rasengan, it becomes the S-rank forbidden jutsu, Wind Release: Rasenshuriken."
As Kageyama Kogetsu spoke, the four wind blades of the Rasengan elongated and curved. A sharp, piercing hum rang out, and a powerful whirlwind caused the surrounding leaves to rustle loudly. The display of power was quite terrifying!
"Once you're familiar with this move, making it smaller isn't difficult. You can also add Tailed Beast chakra."
"When you learn Sage Mode, Naruto, you'll be able to throw the Wind Release: Rasenshuriken."
"No matter how it's extended, the Rasengan is the foundation for all related ninjutsu."
Naruto's eyes shone, and he said with a beaming smile, "Father, I want to learn this!"
Sasuke looked on with anticipation. "Father, what about Chidori? Doesn't Chidori have any extended techniques?"
Kageyama Kogetsu dispelled the Rasenshuriken and smiled. "Don't worry. Although Kakashi hasn't developed any extended techniques, your father has thought of some for you."
"Watch closely. This is Chidori Sharp Spear."
Kageyama Kogetsu extended his right hand, pointed his index and middle fingers forward, and a beam of blue-white lightning shot out, punching a small hole through several large trees.
"This technique can be used to pierce or be fired in various directions. This is Chidori Senbon."
The lightning in Kageyama Kogetsu's hand disappeared. He swung his right hand towards the sky, and a dense barrage of lightning senbon shot out, piercing through the thick canopy of leaves in front of them and embedding themselves in the tree trunks.
"This is Chidori Stream. It lets the lightning current flow around your entire body and radiate outwards, serving both offense and defense."
Brilliant white lightning enveloped Kageyama Kogetsu's body and radiated outward, startling Sasuke and Naruto, who quickly dodged away.
"Don't worry, your father won't hurt you. I'm just letting you feel it up close."
"Additionally, you can channel the lightning into objects, like weapons. If the enemy can't imbue their own weapons with chakra, they won't be able to defend."
"I've also prepared a move for you that rivals the Rasenshuriken. It involves drawing lightning from nature to form a lightning beast to attack the enemy."
"This technique is suitable for a ninja with a three-tomoe Sharingan and both lightning and fire chakra natures, like you, Sasuke."
"The weather conditions aren't right for that technique, so I'll teach it to you later."
"Given that you're not as tough as Naruto, your father has also prepared the Raikage clan's secret technique from Kumogakure for you: the Lightning Release Chakra Mode, also known as Lightning Release Armor."
"This technique is a super-enhanced version of Chidori Stream. It comprehensively boosts a ninja's strength, speed, reflexes, and defense."
"Like this."
As his voice fell, Kageyama Kogetsu's entire body was cloaked in blue chakra, with blue-white lightning arcing around him. A strong wind blew in their faces, and a powerful aura emanated from him...
"I'll tell you a secret. If you master the Lightning Release Armor to a very high level, not even Naruto's Rasenshuriken will be able to break your defense."
Kageyama Kogetsu still favored Sasuke a little more.
With Sasuke's talent in Lightning Release, coupled with ample resources, Orochimaru's technology, and Kageyama Kogetsu's guidance, he might truly be able to master the Lightning Release Armor to the level of the Third Raikage.
Naruto was a warrior, and Sasuke was an assassin. Except for his time as "White Robe Sasuke," he had always been a glass cannon.
Hearing the voice in his head, Sasuke was ecstatic.
Nothing else mattered, as long as he was stronger than Naruto.
"Thank you so much, Father!" Sasuke's smile was as wide as a chrysanthemum, and his voice was so loud it startled Naruto.
"Haha, although you are not my biological sons, I have watched you grow up since you were little and have long since come to think of you as my own."
"Alright, don't get ahead of yourselves. Start by practicing the basics."
"Your father has time today, so I can guide you properly," Kageyama Kogetsu said with a kind and benevolent smile.
He had to admit, teaching them the jutsu created by the original characters felt pretty good. It was like a strange form of NTR, a very peculiar experience.
"Yes, Father!"
Deeply moved, Sasuke and Naruto responded with the loudest voices they could muster, their hearts filled with fighting spirit, and their blood boiled with excitement...
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