Heaven Grade
Ryu took deep breaths, spread out like a starfish. He hadn't thought that as difficult as <Roaring Sky Serpent> had been, that <Whispering Petals> would be even more difficult.
Because he actually had to move to comprehend the profundities of this Dao Charm technique, he had lost count of the number of times his legs had broken.
Truthfully, he didn't have to move. It was just that after the first crack, he felt that there was something beautiful about it that compelled him to move.
Luckily, after reaching Initial Success, the leg breaking didn't happen unless Ryu wanted it to. And, of course he only "wanted it" when he pushed past the current 1% circulation he could use with the technique.
If others saw his training method, they could only conclude that he was a masochist. But, his masochistic tendencies had definitely worked.