A few days had passed since the last meeting with the Third and the others.
Holed up in the laboratory, Zou Hyuga leafed through a copy of the Scroll of Seals, occasionally sinking into thought.
Though he regretted not obtaining the original Scroll of Seals, Tobirama had told him that the village no longer had it. Even the one currently stored in the Hokage Building was a copy.
After all, the original Scroll of Seals had merely been a scroll Tobirama used to record the ninjutsu he developed.
As time passed and more ninjutsu were added to the Scroll of Seals, the medium used to record them had changed.
After skimming through the Scroll of Seals a few times, Zou Hyuga increasingly felt how alike ninjutsu of the same type were. Aside from a handful of special forbidden techniques, all the others were improvements on basic ninjutsu.
Even something as fundamental as the Great Fireball Technique could give rise to dozens of similar ninjutsu.
Ultimately, a ninjutsu's rank came down to how chakra of a single nature was used. The more transformations involved, the higher its rank.
Of course, high-ranking ninjutsu were not necessarily more powerful than low-ranking ones.
They were, however, far more difficult to learn, and forbidden techniques could even harm the ninja learning them.
As for kekkei genkai, aside from those belonging to the descendants of the Six Paths brothers, they were generally formed by combining different types of chakra. The most outstanding example was Iwagakure's Dust Release, a kekkei genkai that could even be learned.
Every Otsutsuki, meanwhile, was born with all chakra natures and could absorb ninjutsu containing chakra, because chakra itself had been brought by the Otsutsuki.
Growing tired of reading, Zou Hyuga slowly rose and walked into the adjoining room.
This laboratory, which