Sometimes, things cannot be said too bluntly.
Emiya Shihara could not simply tell Senju Tobirama that as long as he was truly resurrected, he could cure his older brother.
Senju Tobirama was a suspicious man by nature. The moment he laid it out bare, the other party would undoubtedly suspect that his resurrection was a conspiracy.
Even though it *was* precisely a conspiracy.
Precisely because it was a conspiracy, it needed to be carefully nurtured and designed step by step; otherwise, the plot would be too easily exposed.
However.
Senju Tobirama was somewhat obtuse, caring not a whit about the matter of Emiya Shihara's true resurrection, and focusing entirely on what this "Power of Yang" was that could solve his older brother's dwindling lifespan.
"Lord Emiya, what is the Power of Yang?"
Senju Tobirama furrowed his brows, analyzing it on his own: "This power seems related to Yang-release chakra. I remember that Yang-release chakra can indeed create many miraculous secret techniques, and the use of medical ninjutsu is also related to Yang-release chakra..."
Take the Akimichi clan within Konohagakure, for instance.
Senju Tobirama knew that members of the Akimichi clan excelled at using the secret technique developed from Yang-release chakra—the Expansion Technique, which could temporarily enlarge the human body and strength to extraordinary proportions.
"Indeed."
"The Power of Yang is the ultimate pinnacle of Yang-release chakra."
Emiya Shihara had no choice but to explain the concept of the Power of Yang, tempting Senju Tobirama as much as possible: "The Power of Yang can create life out of nothing, regenerate severed limbs for the sick, and rapidly restore damaged organs..."
At this point, Emiya Shihara cast a regretful gaze toward Senju Tobirama on the hospital bed: "Naturally, it can also bestow a fresh lease of life upon patients whose vitality has been exhausted, allowing them to continue living..."
"Then..."
Curiosity piqued, Senju Tobirama asked the critical question: "How can a ninja push Yang-release chakra to its absolute limit and attain the Power of Yang?"
"That is no easy feat."
Emiya Shihara's eyes flickered as he let out a soft sigh: "By far the simplest method is for someone who already possesses the Power of Yang within their body to share it with another..."
"Your elder brother..."
"Is the most suitable candidate for me to share the Power of Yang with."
A trace of emerald-green chakra materialized in the palm of Emiya Shihara's hand, only to slowly dissipate as he said with a hint of regret: "Unfortunately, the Power of Yang within my body vanished without a trace when I was resurrected this time. Who knows what on earth happened..."
"..."
Senju Tobirama drew a deep breath.
"My apologies."
"This was my mistake."
Taking the initiative to apologize, Senju Tobirama explained in a deep voice: "There was a flaw in my Reanimation Technique, as this was the first time I used this jutsu..."
"No matter."
Emiya Shihara did not blame Senju Tobirama, offering words of comfort while secretly laying a trap: "Perhaps it is because this vessel is not my original body from life, or perhaps it simply vanished in the Underworld..."
"Hm..."
Senju Tobirama furrowed his brows and nodded.
"???"
In his heart, Emiya Shihara mentally marked Senju Tobirama with a question mark.
Wait a minute...
You actually think it's *my* fault?
If there's a problem, aren't you the one who messed up? Could it possibly be the fault of a senior from the ancient era like myself?!
To ensure the Reanimation Technique succeeded, his soul had deliberately lingered in the Underworld, and he had even taken the initiative to come the moment the jutsu summoned his soul!
If he hadn't actively cooperated...
It would be a miracle if this crude jutsu had succeeded!
Truly a headache.
Such being the case.
Emiya Shihara had no choice but to muddle through and keep going.
At least he had found an excuse to stay in the living world for now.
Even if he had to remain active in the Shinobi World in a reanimated husk, there would still be other opportunities in the future. After all, he hadn't failed to leave behind a few contingencies back in his day.
"Forget it."
Looking at Senju Tobirama on the hospital bed, Emiya Shihara let out a long sigh and said, "For now, I'll try using some other medical methods to first restrict the chakra within his body and prevent his self-healing and regenerative abilities from dividing his cells too rapidly..."
"That won't be easy."
Senju Tobirama agreed with Emiya Shihara's approach, though he remained somewhat doubtful of his methods: "My brother's chakra is immensely powerful. Suppressing his chakra will be extremely difficult..."
"It is indeed powerful."
Raising his finger, Emiya Shihara let a pitch-black hue emerge at his fingertip as he praised in admiration: "He is scarcely inferior even to Asura, the ancestor of your clan..."
"This is..."
Senju Tobirama's gaze turned solemn.
"A Cursed Seal."
Observing the cursed seal energy at his fingertip, Emiya Shihara introduced it: "This is a cursed seal condensed from Natural Energy. It can forbid a person from mobilizing the chakra within their body, and the moment they rashly use chakra, it will restrict their movements..."
"I'm not yet certain whether it will be effective on him..."
Emiya Shihara's expression carried a hint of caution, appearing somewhat unsure if his method would succeed: "Because the patient's body bears traces of having practiced Sage Mode, his physique might adapt to the energy of the Cursed Seal exceptionally easily, and it may not necessarily seal his power..."
"Natural Energy... might I feel it?"
Looking at Emiya Shihara, Senju Tobirama took the initiative to propose: "I have some understanding of certain jutsu. Perhaps I could see if I can help improve it and lend a hand..."
That was simply ideal.
This medical ninja from the ancient era was wrestling with his doubts at precisely the right moment.
For Senju Tobirama was indeed struggling with inner conflict; while he trusted Emiya Shihara sufficiently, he genuinely found it difficult to bring himself to doubt the Cursed Seal energy on Emiya Shihara's finger.
Even though Senju Tobirama knew the other party meant no harm, when it came to matters concerning his older brother, he was unwilling to trust others—only by handling everything himself could he truly rest easy.
"I am merely somewhat concerned."
A trace of unease surfaced on Emiya Shihara's face.
"Is there a problem?"
Senju Tobirama raised an eyebrow.
"This is not a commonly used medical jutsu."
Emiya Shihara did indeed look somewhat displeased, and stated his worries with utmost sincerity: "Although the Cursed Seal will temporarily seal a person's chakra, once someone subjected to the Cursed Seal completely masters it, they will also be able to integrate the Cursed Seal to obtain even greater chakra..."
"I worry somewhat..."
"That spreading the power of the Cursed Seal to the world..."
"Will, much like chakra, be used by future generations for conflict..."
Emiya Shihara let out a melancholic sigh recalling his past: "When the Sage of Six Paths and the Ninjutsu Sect first spread chakra, many people worried that chakra would be used by the world for conflict. Asura and I believed that the world would use chakra to relieve the sufferings of mankind, just as we did..."
"As it turns out..."
"Our thinking was indeed mistaken."
"Chakra was ultimately used by ninjas to fight one another."
"Lord Emiya."
"This is not your mistake."
Understanding Emiya Shihara's concerns, Senju Tobirama offered words of comfort: "In this world, the source of error has never been power, but rather the greed in human hearts that refuses to cease."
"Please rest assured."
"I will not leak the Cursed Seal."
Lifting his hand, Senju Tobirama glared coldly at Emiya Shihara as he swore his oath: "Furthermore, if I ever use the power of the Cursed Seal for conflict, may my soul find no peace in the Underworld after death!"
"There is no need..."
"To go that far..."
Emiya Shihara's eyelids twitched involuntarily.
Wait...
Senju Tobirama, you fellow...
Have you truly lost all self-awareness?
As a practitioner who invented the Reanimation Technique and disrupted the peaceful rest of others' souls, you actually believe your own soul can find peace? How can you be so extravagant in your hopes!
However...
Since Senju Tobirama had sworn such a dire oath...
He had no choice but to go with the flow and inflict the Cursed Seal upon Senju Tobirama.
Should Senju Tobirama discover any issues in the future and attempt to undo his Reanimation Technique, the Cursed Seal would also serve as a means for Emiya Shihara to counter his actions.