The Beast Spirit Codex's sixth stage threshold was not easy to cross. Xia Fei kept forcibly using his mental energy to attempt a breakthrough, but it was to no avail.
The energy reserves he had gotten from the insectoid cerebrum was slowly being used up, and Xia Fei was also helpless about the wastage.
This was the time when Xia Fei's obstinate side surfaced. He was not one to give up or get bogged down. Even when his body was telling him that he was at the limit, he would still not consciously give up. He was like an unyielding warrior, treating his body as a weapon as he kept ramming against that door which just would not open.
There were even times when Xia Fei had forgotten why he was trying to get through the door he was throwing himself so recklessly against. He was merely acting on his instinct, the only voice in his mind repeating: 'Breakthrough. You must make a breakthrough…'
