Now there's a filler were Kabuto revives Hidan, that means Hidan is dead. Now Hidan is Immortal so how is he dead ?
Now in order to become immortal by Lord Jushin you must sacrifice for him, shikamaru blew his body and only left his head in a big hole. Remeber in order to become immortal you must sacrifice for Lord Jushin, Hidan was helpless since he only stayed/left in that hole so Lord Jushin removed his blessing and left Hidan to die.
Now in order to become immortal by Lord Jushin you must sacrifice for him, shikamaru blew his body and only left his head in a big hole. Remeber in order to become immortal you must sacrifice for Lord Jushin, Hidan was helpless since he only stayed/left in that hole so Lord Jushin removed his blessing and left Hidan to die.