Hidan -Curse Mode-

Jashin Ritual and Curse :

By Using his weapon, Hidan makes every attempt to acquire an opponent's blood, where upon consuming it he draws the Jashin symbol on the ground. This process somehow "links" his body with his opponent's. Once this link is established, Hidan takes on a Grim Reaper-like appearance, with black skin and white bone-like markings. In this state, he is essentially a living voodoo doll for his opponent; any damage that is done to him is also inflicted on the opponent. Hidan referred to this as his "curse", and he was fond of toying with his victims by inflicting non-fatal injuries with his retractable spears, while taking obvious pleasure in their shared pain. Once he was done playing with the opponent, or if he wanted to kill them quickly, he impaled himself through the heart, killing them and relishing in intense satisfaction.
Despite its effectiveness, the curse has many requirements, and can be a slow technique to employ. The curse can be avoided if the opponent happens to know what to look out for, and knows of Hidan's inability to die. The link between Hidan's curse and his opponent could be broken prematurely if Hidan was removed from the symbol However, Hidan would remain in his transformed state, allowing the curse to be easily re-established by him simply entering the symbol's borders once more