His hypothesis was that a pair of Mangekyō Sharingan acts as the key to unlocking Susanoo. Once successfully unlocked, it could be used even without the Sharingan.
The prime examples of this are Shisui and Madara.
As for why Obito couldn't activate Susanoo, the root cause might be that one of his eyes wasn't with him when his Mangekyō Sharingan was awakened.
Digging deeper, Tōshirō speculated that Susanoo's essence might be intricately connected to the Gedo Statue. Perhaps Susanoo is an extension of the Gedo Statue's power.
Otherwise, Sasuke couldn't have used Susanoo as a vessel for collecting tailed beast chakra without any rejection. This peculiarity is truly thought-provoking.
Regarding this question, Elder Itachi shook his head and did not provide a direct response.
Tōshirō could understand not receiving an answer; after all, the elder himself did not possess the Mangekyō Sharingan.
Tōshirō asked, "Since there's a possibility that Madara Uchiha is still alive, I'll drop the mission to find his corpse. After all, the man is clearly alive and well."
Elder Itachi nodded slightly, his objective already achieved.
At the right moment, he planned to approach Tōshirō with his true form.
At this thought, he gazed at Tōshirō in silence.
"What's wrong?"
"That inscription on the stone tablet—you saw it, didn't you?"
Tōshirō's tone turned serious: "Yes, I did. I never imagined that awakening the Mangekyō Sharingan would require such a trigger."
He had discovered a stone tablet in the Land of Whirlpools, where Cool Cat had him examine it with his Sharingan.
Through Cool Cat's retelling, Elder Itachi had come to know about this, so he wasn't particularly surprised.
Elder Itachi sighed. "That's precisely why I wish to keep this secret buried forever. Otherwise, our clan members would slaughter one another for this power, ultimately leading to our extinction."
Tōshirō agreed, "Indeed."
"Now that you've glimpsed just a fraction of the Mangekyō Sharingan's power, what do you think about it?"
Faced with those eyes, which seemed to see through him, Tōshirō answered without hesitation: "I can't agree with such a method. If the people I cherish are gone, what's the point of gaining such power?"
The usually stern-faced Elder Itachi's expression softened, and he smiled warmly. He joked, "Is that so? That's a bit of a pity. With your aptitude, I'm sure you could awaken it if you wanted to."
Tōshirō shrugged and replied in the same playful tone, "Even if I wanted to awaken it that way, it'd be tough. My family is long gone. If I turned on my companions, the emotional toll might not even meet the threshold. But if it were…"
Here, he deliberately glanced at a certain elder and joked, "How about it, Elder Itachi? Would you sacrifice yourself? Maybe my emotional surge could meet the requirement, and I'd successfully awaken the Mangekyō Sharingan."
Elder Itachi's face darkened.
"Haha, just kidding, just kidding. Don't get worked up. I'd never commit such an ungrateful act."
Elder Itachi snorted in displeasure.
"By the way, Elder Itachi, I have a question."
"What is it?"
"What are the ocular techniques of Madara Uchiha's Mangekyō Sharingan?"
Considering he might face this boss in the future, Tōshirō intended to gather some intelligence from Elder Itachi.
Logically speaking, since they both belonged to the Warring States period, Elder Itachi should have a good grasp of Madara Uchiha's abilities.
After all, during that time, Madara frequently clashed with Hashirama, so his powers should've been thoroughly exposed.
Elder Itachi narrowed his eyes meaningfully. "Why do you ask?"
Tōshirō chuckled, "To prepare in advance, of course."
"Prepare in advance?"
"That old geezer might still be alive and plotting something. If he goes crazy again like last time and attacks the Hidden Leaf, I'd like to know how to respond."
Elder Itachi: ...
"Is there a problem?"
For some reason, when Tōshirō badmouthed Madara behind his back, Elder Itachi seemed somewhat displeased.
Elder Itachi's tone turned serious: "What, do you intend to fight him?"
"Fight him? Of course not. I'm not stupid. I just want to understand his ocular techniques beforehand so I can run away if I encounter him."
Elder Itachi gave him an exasperated look. "Have you ever considered that if he encounters you, he might not even need the Mangekyō Sharingan's techniques?"
Tōshirō: "..."
Elder Itachi sighed silently and mentioned two names: "Amaterasu and Kagutsuchi."
He wasn't lying; these were truly his two ocular powers.
Information about Uchiha Madara could still be found within the clan if one truly wished to search for it. Among the elders still alive in the clan, there were those who had witnessed his ocular abilities.
"What kind of ocular powers are these?"
Tōshirō feigned ignorance, thinking to himself how fitting it was for reincarnations to awaken the same ocular powers.
Elder Itachi briefly explained these two ninjutsu.
After hearing the explanation, Tōshirō nodded, indicating his understanding.
Uchiha Madara continued, "The Sharingan is known as the 'Eye Reflecting the Soul.' The abilities awakened are not only linked to one's inherent talents but also to the emotional state at the time of awakening. At that time, perhaps because he wished to defeat Senju Hashirama and his Wood Release techniques, combined with his natural talent in Fire Release, he awakened these two abilities."
Tōshirō nodded again and asked, "The 'Eye Reflecting the Soul'—that sounds interesting. Is there more evidence? I heard Uchiha Madara's younger brother, Izuna, also had a Mangekyō Sharingan. What were his ocular abilities?"
Seizing the opportunity, Tōshirō decided to resolve a long-standing curiosity.
"Uchiha Izuna, huh..."
(Original text sourced from chapter six#9@book/bar)
Upon hearing this name, Elder Itachi's tone softened significantly. He explained, "Amaterasu and Tsukuyomi."
"Amaterasu and Tsukuyomi?"
Elder Itachi continued, "I've already explained Amaterasu to you earlier, so I won't elaborate further here. The focus is on Tsukuyomi. Unlike Amaterasu, which is hailed as the strongest physical attack, Tsukuyomi is the strongest genjutsu. This technique can pull the enemy's mind into a genjutsu space. Within the world of Tsukuyomi, all factors, including time, place, and mass, are controlled by the caster. It's an extraordinarily powerful genjutsu."
"That sounds incredible."
"Just like how Madara wanted to defeat Senju Hashirama, leading to the awakening of Amaterasu and Kagutsuchi, Izuna also had a rival he desperately wanted to overcome—Senju Tobirama, the Second Hokage and Hashirama's younger brother. The two were lifelong adversaries. Tobirama was skilled in Water Release and genjutsu, so to defeat him, Izuna, a genius in Fire Release and genjutsu, awakened Amaterasu, which could never be extinguished by water, and the strongest genjutsu, Tsukuyomi."
Tōshirō nodded.
He found no issues with these answers. The logic was cohesive and flawless.
Finally, Tōshirō's years-long curiosity about these brothers' abilities was satisfied.
Wait a minute...
Wasn't this just Sasuke and Itachi's abilities...
Except with their roles reversed.
Tōshirō: "..."
"Innate talent and the state of mind during awakening are equally crucial. Based on your situation at the time, if you were to awaken your Mangekyō Sharingan, your ocular power might resemble Susano'o."
Tōshirō waved dismissively, rejecting the idea: "No, I don't want to awaken the Mangekyō Sharingan."
"The only constant in this world is change," Elder Itachi said, his gaze profound. "When we were young, we dreamed of growing up quickly to change the world. But when we grew up, we realized that it was already a blessing not to be changed by the world."
Tōshirō sighed, "Idealism is rich, but reality is harsh."
"In any case, focus on your training and grow stronger—stronger than anyone else."
"Is becoming stronger than everyone the only way to maintain oneself?"
"If you don't control others, others will control you."
"Got it, got it. I'll go train now."
Tōshirō waved his hand, ending the conversation. He wasn't planning to chat any longer.
Elder Itachi often instilled the importance of strength in him.
It wasn't wrong, but it sometimes felt extreme.
"Wait."
Before he could leave, Elder Itachi stopped him.
"What is it now?" Tōshirō asked.
Elder Itachi handed him a scroll. "This is something I promised you last time."
Tōshirō was momentarily stunned, showing confusion. Without asking further, he took the scroll and opened it. Written on it was the word "Sword."
With a puff of white smoke, a weapon resembling a katana appeared in mid-air. Before it could fall, Tōshirō quickly grabbed it and examined it closely.
The hilt bore intricate gold infinity symbol designs. The guard was shaped like paired hexagons. The handle wrap was white with black cord wrapping, and the scabbard was jet black.
Elder Itachi glanced at the sword and said calmly, "This sword is called Enma, one of the Kusanagi swords."
(End of Chapter)
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