Board Thread:Naruto Discussions/@comment-4271790-20141023105023/@comment-24923968-20141024024624

actually sage mode plays the role of a catalyst in forming the rasengan or rasenshuriken. It accelerates the process of formation and also helps in forming more powerful jutsus like big ball rasengan big ball rasenshuriken tailed beast rasenshuriken cho odama rasen tarengan{don't knw the english for that}