I am controlling the wind chakra to infuse it with the rasengan. I don't want to simply release my wind chakra, and let it flow in the air, no I'm controlling and manipulating the rasengan so I can infuse it with the rasengan. And with using shape manipulation, I can manipulate the wind chakra which is infused with the rasengan, and make the rasengan sharp, so it'll have slicing powers.
the issue is that it causes damage to the user and in the RP it's pretty easy to escape it. If someone blows a fireball at you while you're far away and have a rasenshuriken in your hand.. you're pretty unlucky, because the wind will draw in the fire, and make the fire stronger as we have seen in the manga. It would make it very hard for us to escape it, and yeah... it might kill you.
the issue is that it causes damage to the user and in the RP it's pretty easy to escape it. If someone blows a fireball at you while you're far away and have a rasenshuriken in your hand.. you're pretty unlucky, because the wind will draw in the fire, and make the fire stronger as we have seen in the manga. It would make it very hard for us to escape it, and yeah... it might kill you.