[Disciple Might Guy's trust level has increased, current trust level is four]
[You have gifted disciple a collection of Taijutsu insights, disciple deeply appreciates, reward triggers super critical hit, receiving reward—Armament Haki (Perfect level)]
Though the reward was slightly different compared to the one with Shisui, it's understandable, after all, Might Guy isn't from the Uchiha Clan, getting emotionally stirred up won't increase strength by opening eyes.
But overall, Mutsuki is still very satisfied with the gains, Might Guy's trust level has increased, future growth in Chakra will be four times the yield just like Shisui, and also gained a Perfect level skill.
The value of Perfect level skills is very high, leaving aside Sarutobi Hiruzen's other skills, Mutsuki's strength is recognized, with a dense skill set, even so, Sarutobi Hiruzen only has one skill, Combination Jutsu, approaching Perfect level.
Moreover, this Perfect level skill turns out to be the indispensable Armament Haki used by neighboring powerhouses, which is even better.
Based on some localized skills obtained so far, Mutsuki speculates that the system's localization of skills will consider the strength of the skills in their original world.
For example, in Demon Slayer, the Breathing Technique is crucial as it's essential for combating demons; hence, after localization, Breathing Technique is basically at the level of forbidden techniques.
Skills like Soru and Shigan, though decent in their original context, aren't particularly important, so after localization, they are just considered excellent Taijutsu, not particularly crucial.
A plethora of memories related to Armament Haki's training continue to surge in Mutsuki's mind, as if he had trained in this skill for decades in just an instant.
After obtaining the training memories, Mutsuki immediately concluded that this is an extremely practical Yin Release Secret Jutsu.
After localization, Armament Haki belongs to Yin Release; its strength depends on the user's spiritual strength and Chakra intensity.
Beginner-level Armament Haki can be used for Hardening, creating a layer of black substance through Yin Release Nature Transformation covering any part of the body, enhancing defense, or applying it to Kunai or Shuriken.
After reaching Proficient level, one can wrap and project Color of Arms. Wrapping refers to wrapping the special Color of Arms Chakra around the limbs to enhance strength, which can be used in conjunction with Hardening. Projecting involves directly releasing the Yin Release Chakra of Color of Arms, similar to how Fire Release spits fire or Water Release spits water.
Achieving Mastery level Armament Haki grants absolute control over the Haki on one's body, allowing the concentration of Haki at a specific point to create ultimate defense or offense.
As for Perfect level, it comprehensively enhances the quality of Haki. As long as there's enough Chakra, even the hardest Ninjutsu can't withstand it. With Haki applied, one punch can shatter the heavens and earth.
After recalling the methods of using Haki, Mutsuki even felt that Guy could learn a thing or two.
Although it's a Secret Jutsu, Armament Haki belongs to the type where brute force prevails before Mastery. Without precise control before Mastery, Mutsuki believes that even Guy wouldn't be able to reach Mastery level. Given Guy's Ninjutsu talent, even if he were taught the skill, it would be difficult for him to bring it to the Mastery level.
Even if it's just at the Proficient level, it's still a profit. After all, once Guy opens the Eight Gates, apart from having a surplus of Chakra, he can directly flood it, covering his entire body with high-intensity Color of Arms, making his output strong and robust.
"Even being able to use Hardening alone is a significant enhancement," Mutsuki thinks to himself.
The fundamental reason one cannot use techniques after opening the Eight Gates is because the Chakra becomes too violent, making it impossible to meet the standard for using Ninjutsu.
But as for this Armament Haki Secret Jutsu, it's not considered a specific Ninjutsu; it's a method of using Chakra.
Taking the Nara Clan's Shadow Secret Technique as an example, its core is also Yin Release Nature Transformation, while Shadow Imitation Jutsu, Shadow Sewing, and Shadow Thrust are specific Ninjutsu.
Mutsuki doesn't need Might Guy to use Haki in a flashy manner like Ninjutsu; he just needs Guy to be able to use Hardening.
However, Mutsuki isn't certain if it will succeed. After all, he hasn't conducted any experiments yet; it's just a feeling that there might be a chance of success.
After everyone finished giving gifts, it was time for blowing the cake, making wishes, and so on.
"My birthday is on February 10th, just a little over a month away. Everyone should come together then too," Obito reminds with a grin while eating cake.
"It's still Guy's birthday now, Obito, you're too eager," Rin said somewhat helplessly.
Only Obito could probably promote his own birthday while celebrating someone else's.
"Hehe, seeing everyone so happy, I couldn't help but say it," Obito chuckled.
Obito is excited, and Mutsuki is also looking forward to it; after all, opportunities to get such hefty rewards are rare.
Mutsuki felt that getting rewards from Obito might be slightly easier than from Guy.
Although neither of them lacks care from elders compared to Shisui, there are significant differences when it comes down to specifics.
Although Obito is helpful, he doesn't treat everyone equally; on the contrary, the more you treat him well, the deeper his feelings towards you.
From Obito's behavior in the original story, it's evident that he became somewhat unhinged after seeing Rin's death.
Rin started taking care of Obito even before he started school. When Obito was late on the first day of school, it was Rin who brought him the enrollment materials. She continued to take care of him in various ways until her death in Uchiha Madara's conspiracy.
So, for Mutsuki's grand plan, he intends to make Obito see his sincerity towards him from the beginning, the meticulousness in preparing gifts, and his unwavering care for Obito.
"Just don't be late on your own birthday," Kakashi says lightly.
"You're the one who's always late on your own birthday," Obito retorts, then remembers he hasn't told Rin about Kakashi's mishaps on missions.
"Rin-chan, let me tell you, despite Kakashi being a Chunin, both Guy and I, as Genin, are more reliable than him during missions."
"After we entered the Land of Rice Fields, we encountered enemies. I held off a powerful enemy ninja, Guy worked hard to protect the client, and Kakashi was a burden for Yumi-sensei, unable to move as he was controlled on the spot," Obito took the opportunity to relentlessly criticize, leaving Rin stunned.
Kakashi's expression darkened; Obito didn't mention the strength of the enemy but instead exaggerated the strength of the enemy he faced.
Since Obito was adding his own spin to the story, Kakashi decided not to hold back, vividly recalling various details and attacking Obito.
The atmosphere in the room suddenly became more lively.
By the end, Kakashi and Obito were still verbally dissecting the battle, each trying to find the other's shortcomings.
Meanwhile, Mutsuki went alone to the Southern Boundary Forest to test his new ideas.
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