Chapter 167: The Fourth Disciple, New System Functions
"Currently, those are the two I've mastered," Kakashi said, nodding slightly.
In battle, he mainly relied on his swordsmanship and Lightning Release, with Earth Release used for support.
"I'm not particularly skilled with short blades," Mugetsu said after a brief pause, "but I can teach you Lightning Release first. Come with me—you can decide which technique you want to learn."
Mugetsu led Kakashi deeper into the forest behind the training ground, until they reached a wide clearing surrounded by towering trees.
"Lightning Release: False Darkness!"
Mugetsu's hand seals were swift and precise. The next instant, he opened his mouth and unleashed a massive lightning spear. The blinding bolt tore forward, splitting and scorching every tree within twenty meters, leaving nothing but blackened stumps and smoke.
"What a powerful Lightning Release technique!" Kakashi couldn't help but exclaim, his eyes reflecting the crackling light. His respect for Mugetsu rose sharply.
From his observation, Mugetsu was clearly no ordinary Chunin. His level was that of an elite Jonin—his Ninjutsu and Taijutsu both exceptional.
"Lightning Release: Chidori!"
Without rest, Mugetsu raised his right hand. High-density lightning instantly gathered in his palm, the air erupting with a sharp sizzle, sizzle, sizzle!
The thunderous hum echoed through the clearing. Then—boom!—Mugetsu dashed forward, thrusting the Chidori into a massive rock, piercing a hole straight through it.
"So fast… and such terrifying piercing power," Kakashi thought, watching in awe.
While False Darkness had wider range and destructive force, Chidori was clearly designed for speed and direct killing blows. Both were excellent Lightning Release techniques—one mid-to-long range, one close-range and explosive.
For Kakashi's current fighting style, Chidori seemed the better fit, yet False Darkness offered what he currently lacked: a strong, long-range Ninjutsu.
"Which of these two Lightning Release techniques do you want to learn?" Mugetsu asked, looking over his shoulder.
"The first one," Kakashi replied without hesitation.
Although Chidori suited him, he already had the Hatake sword style for close combat. What he needed was powerful ranged support.
"Before we begin," Mugetsu said with a faint smile, "I have one question for you. If I'm to teach you Ninjutsu… what does that make me?"
Kakashi blinked. "My guiding teacher."
"Then what should you call me?"
Kakashi understood immediately—Mugetsu wanted him to call him teacher, just like Obito and Guy did.
What a peculiar man, Kakashi thought. He doesn't act like a typical Ninja. Not of this era, at least.
But since Mugetsu was willing to teach him a high-level Lightning Release technique, he saw no reason to refuse.
"Teacher Mugetsu," Kakashi said calmly.
[Do you want to establish a master-disciple relationship with Kakashi Hatake?]
The system's prompt appeared, and Mugetsu immediately selected "Yes."
How could he possibly turn away an S-potential disciple who came to him willingly?
[Relationship established successfully]
[Current Trust Level: One.]
[Disciple Kakashi has unlocked (Disciple Training Returns to Master) and (Teaching Returns).]
Mugetsu raised an eyebrow. "Trust Level One, huh? Well, I expected that. Kakashi's not easy to fool."
Even though Mugetsu admired White Fang, Kakashi's personality made it impossible for him to open up quickly. Their acquaintance was barely a day old—gaining true trust would take time.
Curious, Mugetsu used Appraisal Technique to check Kakashi's updated panel.
[Name: Kakashi Hatake]
[Chakra: 3300]
[Potential: S]
[Skills: Hatake Blade Arts (Proficient), Lightning Release Chakra Nature Transformation (Proficient)…]
Kakashi's Chakra growth wasn't ideal. Nearly eight months of progress had only added about eight hundred points. Still, an S-rank potential without any bloodline enhancement was exceptionally rare.
His skill levels were decent, though nothing outstanding yet. Hatake Blade Arts and Earth Release: Earth Flow Wall were both proficient, but just barely.
He's still stuck in White Fang's shadow, Mugetsu thought. That loss left him mentally stagnant, unable to grow properly.
But for Mugetsu, this was actually good news—Kakashi's untapped potential would soon become his reward as a teacher.
[Detected four or more disciples with S or higher potential]
[(System Shop) unlocked]
[Reward granted: (Teaching Skill Enhancement Scroll).]
[System Shop: Sells certain physical rewards obtained from disciples.]
Mugetsu immediately opened the new System Shop.
It currently offered only three items—Shuriken, Kunai, and Training Secret Potions.
The prices were identical to the standard market rate, except for the potions, which cost ten thousand ryo each. But their effect—removing fatigue and healing hidden physical strain—was worth far more than that.
Not bad, Mugetsu thought, pleased. If this potion ever hit the market, it would sell out instantly.
The timing couldn't be better. Guy's intense training missions had already consumed nearly all of Mugetsu's stock, leaving only a few samples for study. Now, he finally had a stable supply again.
Next, Mugetsu used the Skill Enhancement Scroll. He was curious how the Teaching ability would evolve this time.
[Teaching (Enhanced): The knowledge you impart is absorbed more efficiently. Diligent disciples will subconsciously rehearse the learned content in their minds.]
Mugetsu nodded slightly. "It's vague, but if it's like Appraisal Technique, the effect should be significant."
He turned back to Kakashi. "The Lightning Spear of False Darkness is both fast and powerful—but remember, it drains Chakra rapidly. This Ninjutsu is extremely energy-intensive."
He paused, recalling something. "I suspect Kakuzu's immense Chakra came from Earth Grudge Fear. Each heart probably added its own Chakra reserves. That's how he could sustain such large-scale Ninjutsu."
[You have taught the disciple Lightning Release: False Darkness, and obtained the Ninjutsu (Lightning Release: Purple Lightning).]
Mugetsu's eyes lit up. Purple Lightning!
Perhaps due to Kakashi's low trust level, the "Teaching Returns" effect didn't trigger a critical hit—but the reward was still impressive.
Purple Lightning was an advanced evolution of Lightning Blade, stronger, faster, and usable without hand seals.
Mugetsu smirked. Not bad at all.
He planned to teach Purple Lightning to Kakashi once he mastered False Darkness. Even if it wouldn't trigger another Teaching Return, it would greatly boost Kakashi's combat ability—and the faster Kakashi grew, the faster Mugetsu would benefit.
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