At the same time, somewhere underground in the Land of Grass.
Far beneath the battlefield, in an underground cavern, some hidden people and things lay concealed.
In the pitch-black surroundings.
An old man with snow-white hair and a decrepit, feeble appearance... one who could even be said to be on the verge of death.
With trembling hands, he treated the injured boy before him.
If Kakashi had been here, he would certainly have cried out Uchiha Obito's name in shock.
Obito, who had been crushed by a massive rock, still had a faint breath!
He... was still alive!
Half his body had been crushed to pieces.
One of his eyes had been given to Kakashi.
Even so, he had not died.
It could be said...
"He's unbelievably lucky..."
The old man spoke.
His voice was hoarse and aged.
Yet it carried an indescribable domineering force.
One could only wonder what sort of world-shaking figure he had been in his youth.
The old man, his snow-white hair hanging down to his lower back, hunched over as he slowly removed the useless tissue from his body.
Then...
He reached out.
Something dangled down from above in the darkness.
It looked like a white humanoid figure.
Yet it also resembled white cream.
He casually tore off half of it.
Then...
He smeared the white substance onto Uchiha Obito's body.
Something astonishing happened moments later...
The white, cream-like substance seemed to possess a life of its own as it slowly fused with Uchiha Obito's wounds.
"No... it's also possible... that this boy awakened the potential of the 'Mangekyō Sharingan'... just as if his body passed straight through the rocks crushing him..."
The old man muttered.
He uttered the same murmur as Kamui from another world.
Mangekyō Sharingan.
It was the Uchiha Clan's greatest treasure.