As Noah looked through the materials left behind by The Ancient One and All-Father Odin, he could not help sinking into deep thought. The materials were essentially an outline of an experiment, along with records of several successful attempts.
The materials were actually divided into two steps. The first was to use certain properties of the ninjutsu Impure World Reincarnation to open a door between the material world and the World of the Dead.
The Ancient One and All-Father Odin had already fully completed this step. They had relied purely on their immense power and the unique properties contained within the ninjutsu, but accomplishing even that much had exhausted all of their strength.
Opening the barrier between worlds was simply unimaginable. Even though they were both beings above the eleventh tier, such a feat had completely exceeded what they could endure.
If the ninjutsu had not contained something special enough, they might not have found any better method even now—perhaps there was one, but the final outcome would likely have dragged them in as well.
However, after completing that step, locating the target had become the hardest part.
It could be said that the materials they gave Noah regarding the second stage of the experiment and their theories were all little more than empty speculation, because they no longer had enough power to carry them out.
But after reading the contents, Noah discovered that although the core of this magic was summoning souls, the most difficult part was actually entering the World of the Dead. Summoning a soul, on the other hand, was not especially difficult.
After this transformation and upgrade, Noah's domain had become a completely independent and relatively complete universe.
Within Noah's domain, the connection to the World of the Dead was so clear that there was no