Xia Fei's Law of Speed training needed him to trace his Law patterns while sprinting at his top speed. This was a unique training method that the Skywing Clan had come up with. Grand Ancestor Xia Gucheng had no idea if it was something passed on from the Fiends, but it was Xia Fei's belief that it was very likely to be the case.
As the most powerful martial technique Xia Fei had in his arsenal, no matter what Xia Fei had learned, he had never once given up on his speed cultivation. After all these years, he had gotten quite used to the alternative training method that the Skywings had come up with.
While speeding, Xia Fei attempted to unleash the energy he had gained from the Purple Soul Brahmas.