What if he stabs himself in the chest what then? Or his forehead? Slits his throat or even cuts his head off what then?1. Lets say Hidan does get Sakura's blood.. Wouldn't The Strength of a Hundred Technique instantly heal any damage Hidan inflicts no matter the severity? Also Hidan has to make the sign "on the ground" before he can start the ritual, Right? Can't Sakura just destroy the ground from beneath him with the cherry blossom impact? Sakura > Jashin Curse.
2. Sakura's not fast but she isn't slow either and she makes up for her lack of speed with regeneration.
3. Sakura can't kill him true but one punch would immobilize.