After seeing Yugito Nii off, Moriyue began his formal research. Blood Death Art was, at its core, a ninjutsu that transferred the price to someone else. The first step in researching a forbidden technique was defining it. Setting aside whether the information Hidan had given him was accurate, from the perspective of the overall technique, Blood Death Art was exactly that kind of ninjutsu.
The conditions for cultivating Blood Death Art were rather strange. One had to believe in a so-called Evil God. The pattern that appeared beneath Hidan's feet when he used Blood Death Art was the symbol of the Jashinism he worshipped, and the pendant he wore bore the same symbol.
More specifically, it was a circle with a triangle drawn in its center.
By worshipping the Evil God, Hidan received the ability known as Blood Death Art. Using blood as a medium, it linked the user to the target and returned one hundred percent of the damage inflicted upon the user to the other party.
But this came at a cost. One known price was that the Evil God required sacrifices. Part of the reason Hidan indiscriminately slaughtered innocents and frequently massacred villages was to offer those people to the Evil God.
Those who used Blood Death Art would not die. Even if their bodies were divided into several pieces, they could survive with only a head remaining. It sounded formidable, perhaps even stronger than the Dog Talisman? But that was not the case. Once they lost the Evil God's sustenance, an Evil God left without sacrifices for too long would decisively abandon them. At that point, Hidan would lose his immortal body as well.
Moriyue's method of interrogating Hidan had been simple. He had merely explained the pros and cons to him—though Moriyue cutting him into