Wind Release: Super Rasengan

One of Shintai's signature techniques, that allows him to create a variant of the Rasengan that far exceeds the potency and versatility of the wind-nature spiraling sphere. This version has him significantly increase the rotation speed and chakra output of the original Rasengan to the point where it slightly exceeds the parameters of the Big Ball Rasengan while still remaining smaller and less powerful than the Ultra-Big Ball Rasengan, and then begins to add the wind-nature to the technique, resulting in the formation of the pinwheel like wind prongs and a much denser composition; that is often expressed by its increased nucleus size.

While in training, Shintai used this to clash against two of his clones, with one of them using the Spiralling Serial Spheres and another utilizing the Big Ball Rasengan and to his surprise, he was not only able to exert enough force to cancel out the techniques but also caused heavy damage to the area and caused his clones to dissipate due to the damage they had taken. This jutsu can vary in size, depending on the mastery and chakra output of the user, as seen with Shintai later on creating one that was just over half the size of the Ultra-Big Ball Rasengan.

Initially, this required an aid of a clone, as creating and maintaining a Rasengan that is bigger than the Big Ball Rasengan and carefully fusing it with his wind-nature was too much to handle for the sixteen year old, but with time and practice, he is able to perform it on his own.

Trivia

 * With more mastery and greater chakra control, the time required to produce it can be potentially cut down to the time it requires an experienced user to form the original Rasengan.