On the fifth day after returning to Konoha, the Ninjutsu Library permit came through, and Mu Yue went to the Ninjutsu Library to select Ninjutsu.
He could freely choose ten Ninjutsu. If he chose well, it would greatly improve the strength he could openly display.
He did not have many good Ninjutsu he could use openly. Most of what he used were Ninjutsu with traceable origins. Great Dragon Fire and Fire Dragon Flame Bullet had both been given to him by Danzo, while Vacuum Sphere had been a reward from Hiruzen Sarutobi.
In addition, he had used various opportunities to legitimize some relatively ordinary Ninjutsu. For example, when teaching Asuma, he had used Water Formation Wall and Water Dragon Bullet. Since he had been watched by the Third Hokage or the Anbu, those two Ninjutsu would be added to his records. He had also used Water Shockwave during the battle against the tailed beasts.
However, this method could only be used for common, ordinary Ninjutsu. Hiruzen Sarutobi would not care if someone knew that kind of Ninjutsu.
Konoha's control over Ninjutsu mainly concerned high-level Ninjutsu and Forbidden Jutsu. Once one became a ninja, learning ordinary Ninjutsu was not difficult.
Moreover, in battle, ordinary ninja generally could not use many Ninjutsu. Most relied on Taijutsu and ninja tools to deal damage. Learning too many was pointless when they did not have that much Chakra.
It would be different if Mu Yue used Water Severing Wave, since it was an advanced Water Release developed by Senju Tobirama. Ordinary people could not learn it, not even Root members.
Mu Yue did not know whether the Ninjutsu Library had Tobirama's Water Severing Wave. If it did, he would definitely choose it. Water Severing Wave was difficult to learn, and mastering it would prove his