eh i think you can throw it even without sage mode but im not sure ask a rp mod.
Alright I'm pretty sure you've seen Naruto use this one in anime/manga/video games, etc.
Rasen Shuriken is basically a combination of the rasengan and wind manipulation that encases the opponent in a huge violent orb of slicing wind that draws in anyone nearby and cuts on the microscopic level but causes +10 damage to you.
So form the rasengan, and then add some more wind chakra to it to form the blades of the rasen shuriken and then try attacking my clone *poof* with it.