Once sensei was done with his instructions and upon his affirmation Jayce started out by extending his dominant right hand, with the palm facing up. Once again he took a brief moment to clear his thoughts before beginning with everything. As he felt ready he started by kneading chakra through his body, into his arm, and then into the palm of his hand. As he steadily released a large amount of chakra, he began to condense and spin the chakra, before having it rotate from multiple directions and increasing its overall power and momentum. Exerting as much focus as possible, Jayce worked to stabilize the small, spiralling mass of chakra and thus, continued to work on his chakra control and shape manipulation. After a brief moment, which seemed to last far longer in Jayce's mind, the chakra finally stabilized, in the form of a light blue sphere, which he held in the palm of his right hand. This technique resulted much more stress in his chakra system and required much greater precision and chakra control, which Jayce of course had. As Jayce's affinity was the deadly and powerful wind element he had no trouble applying the wind element into the blue lighted swirling sphere. Once he was done with creating the normal rasengan he continued by converting the swirling sphere of chakra into wind, by applying nature transformation on his own, which required an immense amount of focus as he also worked to keep the technique stabilized in its shape. Finally he created a rasengan that was combined with the powerful wind element. One could notice the sumptuousness of the new created sphere.
Jayce felt the power of the new sphere immediately and he assumed that his sensei will ask him to test it on something. He was staring into the innocent sky as the sun rose, watching the magnificent scenery come to life everywhere. The sun was shining so bright it even gave Jayce's swirling wind sphere a new, more beautiful than before colour. Next he scanned the whole battlefield/training-field for an object on which he could test the new technique. Jayce soon enough noticed a nearby dummie, probably Castiel sensei had left it there for a purpose. Afterwards he immediately, not wasting a second, once again sent chakra into his feet thus adding a slight boost to Jayce's overall speed. Next he bursted forward in intense speed, from kicking off with his legs, and entered instantly in a straight arc towards the dummie, each step closed further emphasizes just the true power that lies straight ahead in the rasengan that he was holding in his dominant right hand; Jayce wasn't sure if this rasengan wasn't going to damage him, he very good knew what he was getting himself into, but the excitement was worth it. While he was running towards his opponent, in this situation the nearby dummie at approximately five meters away, he had his eyes locked their deep gaze on the object in front of him. His vision was scanning every single move of his target, as he was approaching. Once reaching combat-length away from the dummie, Jayce slightly leaned forwards, holding his dominant right hand, in which the rasengan was located, outwards and was making sure to keep his mind calm and smooth so he can meticulously control the chakra into his body and making sure to stabilize the rasengan the whole time so it would not lose its momentum and shape. Then he extended the swirling wind spehere towards the clone, whilst conjuring something which appeared to be the powerful and well known rasengan, which this time was combined with wind affinity, striking the wind spiralling sphere into the dummie's chest, causing him to spiral out of control, endure immense damage, because of the wind attributes (fast and sharp) and be projected far into the distance.
The dummie was sent backwards and was completely destroyed. Jayce felt a bit of pain his dominant right hand. The rasengan was indeed a powerful technique to use and he had to make sure to use it the right way otherwise it could backfire at him one day.