Jashin

is the god worshiped in. One of its followers is the Akatsuki member Hidan. Jashin, according to Hidan, expects that all followers of Jashin - so named "Jashinists" - bring nothing less than utter destruction and death. Hidan always used to pray to Jashin before a fight, asking for a "good kill." If he is unsuccessful, or is not allowed to kill, he prays for forgiveness.

When undergoing a sacrifice, Hidan changes appearance after ingesting his opponent's blood. His skin then turns black with white markings representing a skeleton, a symbol of absolute death. He draws Jashin's symbol on the ground in his own blood and stands in the center. This symbol is an equilateral circumscribed triangle (an upside down triangle with a circle around it). Once his sacrificial ritual takes place, any kind of pain or injury that Hidan inflicts upon himself is also inflicted upon his sacrifice, be it a mere scratch or a pierce in the heart. However, this ritual can be broken if Hidan either steps or is forced out of the circle. This technique is called "Curse Technique: Death Controlling Possessed Blood."

Hidan is the "successful experiment of the Jashin religion's secret techniques," which makes him become immortal. He uses this advantage to otherwise fatally injure himself while he is linked to his opponent in order to kill them.

The philosophy and practices of Jashinism are mirrored in the once-feared Indian religious cult of Thuggee, whose followers would commit ritualistic murder in honour of their goddess Kali.

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