When Zhang Yu swept aside that wisp of Xin Daoist's spiritual qi, he sensed no threat within it. This indicated that the qi might truly contain something.
But so what?
The two sides were at war now. So long as there was even the slightest possibility, he would not touch qi of such unknown origin. The world's myriad Dao methods were strange and treacherous; even he could not guarantee that he would not fall into the other side's scheme.
Moreover, Xin Daoist's words had revealed that there might be some enemy behind him, so there was even less need to ponder the matter further.
Origin Xia had no shortage of people who wanted him dead. And no matter what enemy it was, if they lacked the power to crush Celestial Xia in one blow, they would ultimately have to come before him and settle victory or defeat. When that time came, they would merely fight, and let their swords decide who stood higher.
On the road ahead, he happened to lack sufficiently weighty opponents with whom to verify his Dao. The more such people came, the better. Personally, he welcomed them without reservation.
He raised his head and looked ahead. After Daoist Zhenxian had been slain, the remaining three had directly fled with the qi of their treasures. Those who had penetrated deep behind the formation had also severed their proxy bodies one by one and departed, even using treasure qi to shield themselves. Even if he had wished to act, it was already too late, so he let them go.
This time, they had cut down three people and held the formation. The results were passable, and their objective of checking Origin Xia and restoring the formation had also been achieved. All that remained was to defend it and