Faced with Lu Yuan's attack, Chu Qingyun currently lacked the Primordial Power to unleash the Thunder Sword.
With a mere thought, he commanded three Flame Vines to shoot forward and block Lu Yuan's fist.
A punch from a Level Nine Martial Spirit was incomparably fierce.
One of the three Flame Vines was instantly obliterated, while the other two were badly mangled.
However, Chu Qingyun used the opportunity to take two steps back, mobilizing the Primordial Liquid in his Qi Sea and converting it into streams of Primordial Power to replenish his meridians and Martial Soul.
Soon, the two were clashing once again.
However, even when Chu Qingyun used the Thunder Sword, augmented by the power of his Martial Soul Fire, he couldn't break through Lu Yuan's Qi Realm defense.
As a Sect Disciple, Lu Yuan's control over the gray "Fist Qi" was exceptionally versatile. He used it skillfully for both offense and defense, leaving no openings.
