Kai found a good place after searching for a long time. It was a huge tree; its height alone was more than 100 meters, and its width was more than thirty meters.
'I should make this place my home from now on.'
Kai planned to drill the tree to make himself a house inside the tree. He wanted to do that without any help from the tools.
He has enough types of equipment to do the job in half a day, but he wanted to do that with his Will power and also do that as training.
Kai manifested his will power on the hands and started cutting them without using any of his power.
He didn't cut anything with the Will power alone, but he did that again. After doing that for an hour, Kai finally caused some small damage to the tree, but it was nearly enough to make a hole.
Kai has good control over his will power, but he doesn't have control over his attack power, so he is doing this training.