The next few days passed.
After Hyuga Sho returned, Yakushi Kabuto finally felt at ease performing the Hashirama Cell transplant surgery on Kimimaro.
Aside from strengthening his subordinates, Hyuga Sho spent his time testing the progress Uchiha Izumi and the other Ninja Weapons had made over the past three years.
Because of the nature of her Mangekyō Sharingan Dōjutsu,
Uchiha Izumi's appearance remained the same as it had been back then, without the slightest change.
In some ways, her time had completely stopped.
She had begun training from a young age.
She had awakened her eyes early.
Uchiha Izumi had everything going for her.
On top of that, she had spent years as a rogue ninja.
Not only were Uchiha Izumi's fundamentals solid, but her overall combat ability had also advanced by leaps and bounds. She could even stand alongside veterans who had experienced major wars.
However.
Uchiha Izumi had one weakness.
Her Mangekyō Sharingan would eventually descend into darkness.
Although the Hashirama Cell Solution could restore her eyes, functioning much like eye drops,
it was ultimately not a long-term solution.
Later, Hyuga Sho sent Uchiha Izumi to Ryūchi Cave, where she learned Ryūchi Cave's Sage Mode.
With the support of Sage Mode,
the harm caused by the Mangekyō Sharingan was completely neutralized.
It was just like Naruko's Sage Art: Wind Release: Rasenshuriken.
By relying on the duration of Sage Mode, Uchiha Izumi could fight without suffering any damage.
Among all the Ninja Weapons under Hyuga Sho,
apart from Kaguya-hime, she was the strongest.
However, in this era where immortals were everywhere, Uchiha Izumi's strength was no longer enough.
Therefore,
Hyuga Sho manually condensed a new pair of Mangekyō Sharingan for her.
They were near-relative bloodline replication eyes created from Uchiha Izumi's genes and those of her mother, Uchiha Hazuki.