Zhou Chuan had used a 5th-grade Spirit Refining sword during the arena tournament. Although that weapon was difficult to bind to an owner, it required very little spiritual power input to activate. Therefore, simply wielding a 5th-grade Spirit Refining item was not enough to prove just how powerful Zhou Chuan truly was.
A 6th-grade item was entirely different. It required a torrential surge of spiritual power to be poured into it, something even a prodigy like Fangsheng could not achieve. Among all the Core Formation cultivators Fangsheng had previously encountered, Zhou Chuan was the only one who had managed it.
"This Heavenly Book... it looks vaguely familiar!" Fangsheng had an impression of the Heavenly Book, but he was not entirely certain.
Chapter 571