A ninjutsu with pre-eminent destructive power, caused by wildly spinning chakra inside one's palm and compressing it to a high density — the Rasengan. Using the same essentials, but also rapidly increasing the amount of chakra used, results in the Big Ball Rasengan. It was created by Naruto Uzumaki during his training with Jiraiya. At first, Naruto needed a shadow clone to form the Big Ball Rasengan and help him wield it. But as he got more skilled with it, Naruto can now wield the attack with one hand, but still needs a shadow clone to help him create it. Compressed to an even higher density than before, the chakra is released all at once as soon as the technique hits the target, releasing an extraordinary destructive power. Proportional to this power, the amount of chakra it consumes is also extraordinary. With him possessing the Nine-Tails' chakra, it could be said that this technique is for no-one but Naruto.