Besides the sacrificial vessel used as the body of a "reanimated body," the precision of the summoning in "Impure World Reincarnation" would also directly affect the reanimated body's spirituality and strength.
"This version is far too outdated..."
After carefully analyzing the "Impure World Reincarnation" recorded in the Book of Seals, Hyuga Kagami felt that if he performed the jutsu according to this original version, it was hard to say how much spirituality his reanimated body would possess in the future.
He could not even be sure whether what was reincarnated through this Impure World Reincarnation would truly be his complete self.
Frowning, Hyuga Kagami slowly closed the Book of Seals.
During the Fourth Shinobi World War in the original timeline, the Impure World Reincarnation Jutsu Orochimaru used was not the original version developed by the Second Hokage. It was an entirely new version that Orochimaru had continuously explored and improved over many years.
From a certain perspective, Orochimaru was the second developer of the forbidden technique known as Impure World Reincarnation.
That was because the Second Hokage's original purpose in developing Impure World Reincarnation was to use immortal bodies to perform another forbidden technique he had developed, called Mutual Multiplication Explosive Tags.
Orochimaru, however, was different.
Orochimaru had keenly realized that the true purpose of Impure World Reincarnation was to blur the boundary between life and death, allowing the dead to descend upon the Ninja World once more.
Thus, the direction of his improvements had always been summoning precision and control.
He hoped to use precise summoning to bring every last fragment of a deceased person's soul from the underworld into the Ninja World, thereby ensuring the spirituality of the reanimated body and allowing it to truly come alive.
If Hyuga Kagami had to choose, Orochimaru's improved version of Impure