Lord Jashin Otsutsuki

Little of Jashin and his ways is known to those who aren't his followers, so named "Jashinists". According to Hidan, Jashin demands nothing less than utter death and destruction, intended to teach understanding for the pain of others. In Akatsuki Hiden, Hidan frames this as a public service, saving people from the fear of death by killing them. Hidan always prays to Jashin before a fight, asking for a "good kill". If he is unsuccessful, or is not allowed to kill, he prays for forgiveness. Hidan is particularly drawn to the doctrine of, "Thou shalt kill thy neighbour." In Akatsuki Hiden, Hidan explains to Ameyuki that a "neighbour" requires more than physical proximity; Hidan spends most of his time with Kakuzu, but he will never consider Kakuzu to be his neighbour because he hates Kakuzu. When Ameyuki later destroys Shangri-la, in the process killing everyone he's lived among for the last few years, Hidan declares him a martyr. In Konoha Shinden, Konoha investigated Jashinism following their encounter with Hidan. They were unable to turn up much conclusive information about the religion, and in fact could not locate a single worshipper. With so little information to go on, Konoha's official report offered the possibility that Jashin was in fact an invention of Hidan. Several years after the Fourth Shinobi World War, Konoha joins forces with Yugakure to investigate Jashinism again. In doing so, they uncover a sect of Jashinists led by Ryūki, who have been kidnapping travellers to sacrifice to Jashin. Mirai Sarutobi, with help from Kakashi Hatake and Might Guy, is able to stop the Jashinists and save the sacrifices.Hidan is the "successful experiment of the Jashin religion's secret techniques", which makes him immortal malnutrition is the only known way he can die. In Akatsuki Hiden, Hidan says he was granted this immorality in exchange for the many sacrifices he and his fellow worshippers made. so simply he's a powerful god beyond imagination.