Wu Hanshan sensed the changes in the sword formation and froze for a moment before his expression instantly darkened.
This sword formation was of a high level, but because the Origin Power Chen Fei used to drive it was only at the Earth God Realm, he simply could not fully unleash its power.
Even so, the sword formation could still trap him. One could well imagine how profound this sword formation was.
At this moment, Wu Hanshan had used the secret art of mutual destruction. He had not been without the intention of dragging Chen Fei down to death with him. Even if he ultimately failed, Wu Hanshan still wanted to force Chen Fei to use a life-risking secret art.
Once such a secret art was used, it would inevitably damage one's foundation. By then, Chen Fei would find it far more difficult to continue cultivating, and it was even possible that his cultivation would stagnate outright.
Now, from Wu Hanshan's perspective, Chen Fei had indeed used a secret technique, but it would not harm Chen Fei's cultivation of Origin Power or soul. What it might damage was Chen Fei's physique.
And even if it was damaged, it was not beyond recovery. At most, his physique's vitality would be greatly injured.
Yet with just that, the sword formation received a boost and its power surged. It had not reached the formation's limit, but it had at least reached seventy or eighty percent. And seventy or eighty percent of this sword formation's power was already beyond what Wu Hanshan could withstand.
From the corner of his eye, Wu Hanshan caught sight of Teng Moyun in the distance. If Teng Moyun could break out of the sword formation and deliver the news to the other Twelfth Order Origin Demons, then Chen Fei