For his first experiment he decided to use the lowest concentration of youki he could and work his way up from there. A short string of handsigns later and he inhaled deeply before activating the technique and expelling the gathered air in a single burst.
A small fireball flew from his mouth towards the log, but quickly destabilized and fizzled out completely a mere ten feet away.
Kuushou blinked, trying to place the odd sensation he had felt. There was something… shrugging, he shook the odd feeling off and refocused. Perhaps his human chakra was still too weak or he hadn't used enough; it was his very first time using any human technique, after all.
Grinning, he prepared a much more youki-intensive batch of merged energy and began the technique again. If all he needed was more power, this should be more than sufficient.
The fireball he expelled this time was easily ten times the size of the previous, looking more like a strong example of the Grand Fireball technique than what should be its weaker counterpart. His eyes widened in delight and victory as the fire roared towards the training post… and then began churning in midair. His expression faltered; that certainly wasn't what the technique was supposed to do.
"What the…"
Kuushou's eyes widened when streams of fire began pouring out of the fireball and rushing back towards him. Too late he remembered where he had felt that sensation before and figured out what was happening.
"Well… shit," he said, before the fire slammed into his body.
-August 30th, 340 NE-
-5:00 PM-
-Yamanaka Residence-
While he had quickly healed the burns and other damage caused by the fire, his clothing was a complete loss, the charred scraps that remained were wholly inadequate to cover him. It had taken him nearly two hours to make it back to the Yamanaka home unseen; he didn't want to explain just why he was running through Konoha naked.
Freshly clothed and bathed, he settled back into the library and started reviewing chakra theory again. He would need to find techniques that did not require chakra to sustain once they were launched. Water sounded good, at least for now – less likely to destroy his clothing and far easier to explain.