Naruto Wikia said:
- The Rasenshuriken creates countless microscopic wind-blades that severely damage the body on a cellular level.
- It produces so many individual strikes that even Kakashi Hatake is unable to count them all with his Sharingan.
- The wind-blades sever all nerve channels in the body, leaving the target unable to move after being struck.
- They also attack the entire chakra circulatory system, which cannot be repaired by any form of medical ninjutsu whatsoever.