As the Uchiha clan's prodigy, Shiro Gen was born with the standing to be clan head.
He would not waste such a vast power base.
Yet this world still bows to strength.
He would hold the reins, but not spend time on day-to-day management.
Within the clan, true administrators were few.
Even Setsuna lacked that talent.
Fugaku was no genius at it, but he was serviceable.
So Shiro Gen spoke with him about management, commerce, reform, social classes, and productivity.
As he listened, Fugaku's eyes grew brighter.
Yet the way he looked at Shiro Gen was as if facing a monster.
Could anyone be born knowing?
Such fearsome wisdom was shocking.
Shiro Gen was only six.
How could he think of these things?
Fugaku felt a genius's mind was beyond his imagination.
It did not matter how the boy conceived it.
If the knowledge helped him and the clan, it was enough.
He could use it to earn money, reform the clan step by step, raise its standing, and widen its influence.
Even this alone could change their fate.
Yet he also sensed Shiro Gen's ambition was terrifyingly large.
What shape would the clan's future take under his plan?
To be Hokage?
To rule the village?
Or more?
"Clan Head Fugaku, I need to train. I do not have time to manage the clan. You will remain responsible."
"I trust you will not disappoint me."
"Understood?"
Hearing Shiro Gen, Fugaku did not hesitate. He was wholly convinced.
"Rest assured, Lord Shiro Gen."
"I am Uchiha. I will not let you down."
"It is my honor to manage the clan for you."
"Good."
"Next, give me all of the clan's archives, and fund my training at full."
"Yes, Lord Shiro Gen."
The clan was pure in its way.
With little maneuvering, simply by showing strength, talent, and wisdom, Shiro Gen had the Uchiha in hand.
Next,
beyond study and training,
he would also lift the clan's overall power.
"Fire Release Chakra Mode suits Uchiha shinobi well."
"Ordinary clansmen cannot learn the version I use."
"But the first-stage model, they should manage."
He decided at once.
He would hand Fugaku the first-stage Fire Release Chakra Mode and leave the rollout to him.
Raising his own strength mattered most.
...
...
"Izanagi and Izanami."
In the clan's highest secret scrolls, Shiro Gen found those two ocular arts.
Izanagi was a forbidden Uchiha technique, usable only by Sharingan wielders.
Not every Uchiha could access it.
When used, Izanagi rewrites reality within a set window, erasing misfortune to the user and fixing only favorable outcomes as real.
The window varies by user, but the eye that casts it always goes blind.
While the window lasts, even death can be changed, making the user untouchable.
The price is permanent loss of light in that eye, hence its ban.
Izanami was crafted to counter Izanagi.
Long ago, as more Uchiha mastered Izanagi's reality rewrite, civil strife broke out.
Uchiha Naka's partner fell in love with its function and descended into madness and murder.
Determined to save him, she created Izanami and used it on him, making him see his error and accept fate.
Izanami does not need eye contact. Two identical sensations are enough to trap the target.
It binds them in an infinite loop across three instants framed by those sensations.
Only by facing oneself and choosing differently can one escape.
Its price mirrors Izanagi's. One eye loses its light forever.
"These two forbidden ocular arts are, at their core, genjutsu - Yin Release."
"Yin creates form from nothing, bending real and unreal."
"Like the Mangekyo itself, whose arts feel like wishcraft."
Reading, Shiro Gen formed a hypothesis.
If he mastered both arts, [Yin Release Control (Blue)] would surely ascend to [Yin Release Dominion (Purple)].
With that purple entry, [Three Tomoe Sharingan (Blue)] could evolve into [Mangekyo Sharingan (Purple)].
He had long awaited the Mangekyo.
"What will my Mangekyo powers be... and what form will my Susanoo take."
"Exciting."
He stilled his thoughts and devoted himself to Izanagi and Izanami, aiming to open the Mangekyo soon.
For him, Izanagi was not hard.
In under ten days, he learned it.
Izanami was far harder than Izanagi.
Hard, but not beyond someone with [Exceptional Wit (Purple)].
Days turned to weeks.
On the thirty-second day, Shiro Gen finally learned Izanami.
[Yin Release Control (Blue)] -> [Yin Release Dominion (Purple)]
[Yin Release Dominion (Purple): You grasp the principles of Yin-nature transformation, genjutsu, and ocular arts deeply and completely. You possess absolute dominion over Yin chakra. You can cast most genjutsu and ocular techniques with a single seal, and their power increases greatly.]