The data on the system panel had not only changed today; he had noticed those changes long ago.
Water Style had risen from A to S, Fire Style from A+ to S, Wind Style from B to A+, and Yin Style from A+ to S. Even Lightning Style and Earth Style had improved.
Most of the credit for those improvements had to go to Orochimaru.
He had spent considerable thought and time before he could be said to have basically digested that ninjutsu scroll.
It was not because he learned slowly, but because the scroll contained too much.
Orochimaru had written down his understanding of ninjutsu, his insights into the various chakra nature transformations, and even his ideas for certain forbidden techniques.
Every page was packed with writing—truly invaluable experience.
It had to be said: Orochimaru was a genuine genius in this regard, without the slightest exaggeration.
His desire for ninjutsu was pure, pure enough for him to spend his entire life pursuing it.
As Genkawa Uchiha studied those things, he could sense Orochimaru's excitement and focus when he had written those words.
At his current level, he had not yet fully absorbed all of Orochimaru's insights. The deeper things required time to digest and put into practice before they could become his own.
Even so, his ninjutsu abilities had already undergone a qualitative leap.
Genkawa Uchiha had to admit that Orochimaru's mastery of ninjutsu was extraordinarily high.
Otherwise, he could not have developed Living Corpse Reincarnation later, nor refined and improved Impure World Reincarnation to such an extent.
Such things required profound foundations; they could not be piled together with one or two forbidden techniques.
Put that way, he felt he owed Orochimaru a favor.
Though the scroll had nominally been an apology gift, he would remember this favor.