Chapter 584: Ambush

A spiritual essence fell into the Qianyuan Sword, causing it to tremble slightly. Since the last time it slew Ning Yanding in the Outer Sea, and today it slew Liu Wanggu, the Qianyuan Sword had absorbed a considerable amount of spiritual essence.

Initially positioned highly among the middle-grade spiritual treasures in the imperial city, the Qianyuan Sword had now approached the critical threshold of high-grade spiritual treasures after absorbing so much spiritual essence from cultivators in the mid-level Combined Aperture Tempering realm.

However, advancing the Qianyuan Sword to a superior-grade spiritual treasure was not an easy task. Chen Fei still needed to purchase some spiritual materials and meld them into the Qianyuan Sword to aid its advancement.