Rinnegan!"
Thinking of the Rinnegan, Uchiha Fugaku's eyes couldn't help but show desire.
The Rinnegan, one of the strongest Eye Techniques, is an extremely high-level Eye Technique.
This can be seen from the original work, where Nagato, relying on a pair of transplanted Rinnegan, destroyed Konoha, one of the Five Great Shinobi Countries, in a single blow, leaving Konoha with no power to resist.
And this was not the full power of the Rinnegan.
After all, it was a transplanted eye, unable to perfectly merge with the body, so its power when used was not as strong as its original owner's.
"Let's check the abilities of this Mangekyo Sharingan!"
He checked the memories of his predecessor to confirm the abilities of this Mangekyo Sharingan.
This Mangekyo Sharingan would become his greatest trump card now, and he needed to thoroughly understand its abilities.
"The right eye's Eye Technique is Real Illusion!"
His eyes brightened slightly.
Real Illusion, an ability similar to Uchiha Itachi's Tsukuyomi.
Like Tsukuyomi, it can create an illusionary space.
The only difference is that Uchiha Itachi's Tsukuyomi can control time, location, and mass within the illusionary space it creates.
However, his illusionary space can reflect the damage inflicted on the enemy within the illusion back into reality.
For example, if an enemy is cut with a sword in the illusionary space, then a wound will also appear on the enemy in the outside world.
The ability to reflect damage caused by an illusion into reality is why this Eye Technique is called Real Illusion.
"An illusion stronger than Tsukuyomi!"
In his opinion, Real Illusion was definitely an illusion with greater power than Tsukuyomi.
Tsukuyomi could only cause spiritual damage, whereas Real Illusion could reflect the damage caused in the illusion onto the body, a clearly higher level.
"The left eye's Eye Technique is Corpse Fusion!"
After carefully savoring the right eye's Eye Technique, he looked at the left eye's Eye Technique, and the next moment, his eyes became fervent.
Corpse Fusion, an extremely special Eye Technique.
It can fuse the corpse of a recently deceased person into one's own body to gain that person's talents in Genjutsu, Taijutsu, Ninjutsu, and other aspects.
If that person possessed a Bloodline Limit, it could even transform that person's Bloodline Limit into his own.
It did not disappoint him; the left eye's Eye Technique was not inferior to the right eye's Eye Technique.
To some extent, its value was far superior to the right eye's Eye Technique.
"Pedantic, having a treasure mountain yet not knowing how to utilize it properly!"
After reviewing Uchiha Fugaku's memories regarding the development and application of the left eye's Eye Technique, he couldn't help but feel disdain.
He disdained his predecessor's pedantry, possessing a treasure mountain yet not knowing how to utilize it properly.
In his predecessor's view, as the head of the Uchiha Clan, his talent in Ninjutsu, Taijutsu, and Genjutsu was not inferior to anyone's.
His clan's Bloodline Limit was the strongest, and the Bloodline Limits of other families were far incomparable to his clan's Bloodline Limit.
Therefore, his predecessor regarded Corpse Fusion as a mere trifle and had never used it.
In his opinion, this was extremely foolish.
Having a treasure mountain yet not knowing how to use it properly, no wonder the Uchiha Clan ultimately met with extinction.
It can be said that the Uchiha Clan's extinction had an extremely significant relationship with Uchiha Fugaku's weakness and pedantry.
"With Corpse Fusion, my chances of obtaining the Rinnegan are much greater!"
He was extremely excited.
The two conditions required to obtain the Rinnegan, transplanting a pair of genetically similar Mangekyo Sharingan, are not difficult to achieve.
Uchiha Itachi's Mangekyo Sharingan is very suitable for him; given their blood relationship, the possibility of evolving into the Eternal Mangekyo Sharingan after transplantation is extremely high.
As for his superficial father-son relationship with Uchiha Itachi, since he wanted to kill him, how could he care about their father-son relationship?
Leaving him alive was already considered benevolent and righteous.
The troublesome part was the other condition: transplanting hashirama cells.
Transplanting hashirama cells carries great risks; a single mistake could leave side effects, or even lead to being devoured and eliminated by the hashirama cells.
Moreover, even if the transplantation is successful, it is not guaranteed to perfectly merge with the body.
In the original work, after Uchiha Madara transplanted hashirama cells, it took him decades, until he was on the verge of death, to finally evolve the Rinnegan.
In his opinion, the reason it was so slow was because the hashirama cells did not perfectly merge with Uchiha Madara's body.
However, if he were to use Corpse Fusion to fuse the corpse of someone who had perfectly integrated hashirama cells into his body, not only would he gain hashirama cells, but the hashirama cells would also perfectly merge with his body.
In this way, the time to evolve the Rinnegan would inevitably be greatly shortened.
"Not just the Rinnegan, but I can also use this to obtain Bloodline Limits not inferior to the Rinnegan!"
He thought to himself.
Without Corpse Fusion, with his foresight, his ultimate achievement would likely be limited to obtaining the Rinnegan.
Although possessing the Rinnegan would grant him self-preservation, he certainly wouldn't be able to contend with the Ten-Tails or Ōtsutsuki Kaguya.
But with Corpse Fusion, it's different; he could also use it to obtain other Bloodline Limits not inferior to the Rinnegan.
Such as the Tenseigan, an Eye Technique passed down by Ōtsutsuki Hamura, the Six Paths Sage's younger brother.
He knew the principle of obtaining this Eye Technique.
The eyes of the Hyuga Clan, plus Ōtsutsuki Toneri of the Moon, are the method to obtain this Eye Technique.
By fusing the corpses of the Hyuga Clan and Ōtsutsuki Toneri using Corpse Fusion, this Eye Technique should be able to be born.
"If I can possess both the Rinnegan and the Tenseigan simultaneously, even Ōtsutsuki Kaguya would not be unbeatable!"
He couldn't help but look forward to it.
Both the Rinnegan and the Tenseigan are extremely powerful Eye Techniques; imagine how powerful it would be to possess both.
Since the Six Paths Sage and Ōtsutsuki Hamura, the two brothers, could seal Ōtsutsuki Kaguya by working together, he didn't believe that he, possessing both of their Eye Techniques, couldn't do it.
"He really had a treasure mountain but didn't know how to use it!"
He couldn't help but lament his predecessor's foolishness again.
He possessed a powerful Eye Technique like Corpse Fusion, yet he didn't know how to use it to enhance himself.
Of course, this was also because his predecessor didn't have the same foresight as him and didn't know the methods for the birth of the Rinnegan and Tenseigan.
The Eye Technique of Corpse Fusion could only achieve its maximum effect in the hands of someone with foresight like him.
For anyone else, at most, it would allow them to acquire multiple Bloodline Limits.
Although this could enhance their strength, it would not lead to a qualitative improvement like obtaining the Rinnegan and Tenseigan.
"Fugaku, dinner's ready!"
A soft knock sounded, and Uchiha Mikoto's voice came from outside the door.
"Got it!"
Uchiha Fugaku replied, pushed open the door, and walked out of the study.
With a method to improve his strength, he was no longer as anxious as when he first transmigrated, and he calmed down.
The future was not hopeless; he had found the "cheat" to overcome the difficulties.
It was just that this cheat was not a gift from transmigration, but something his predecessor already possessed.