"Hah!"

A loud shout resounded alongside the sound of a blade being swung. Since Su Yu had broken his closet previously, he did not dare to practice the even more powerful Lightning Source Blade home. He was afraid that he would damage his house or even worse, cut the floor apart and ended up beaten by the grandpa downstairs with his massive fists.

The standard military saber in his hands moved rapidly as it whistled through the air. After a while, he stopped swinging the saber while panting for breath. A frown was on his face.

Difficult.

A profound-grade martial technique was still too difficult for him. It was too early for him to learn something like that. That was the case even though the first move, Lightning Strike, only required a connection of nine acupoints.

"I know the move, but the issue is source qi."

That was Su Yu's conclusion. The move wasn't actually difficult.

His issue was the connection of acupoints and eruption of source qi. He needed to gather all his source qi on the saber before swinging the blade with the speed of lightning. He had only opened eight acupoints. He could utilize the source qi within his body but not the ambient source qi around him.

"I still can't gather my source qi onto the saber fast enough."

Su Yu frowned. It had been three days.

Three days on a single move wasn't a long time, but even though he had been studying the Lightning Source Blade several times per day, he still wasn't able to properly gather his source qi. 

That signified that he hadn't achieved even a basic mastery of the first move. To reach that point, he had to at least be able to gather all his source qi as one before channeling the source qi onto...