Zhang Yuan smiled without a word.
Though Foundation Establishment Celestials were powerful, even they could hardly tamper with a Heaven-and-Earth Trial. The person Wu Yuhei had to face for his trial was indeed Cui Zhaowei.
Unfortunately for Wu Yuhei, he had run into Zhang Yuan and his master, Xiao Yuanjun.
First, Zhang Yuan had used [Myriad Coexistence] to link his karma and aura with Cui Zhaowei's, then [Golden Carriage Luan Chariot] to invert their destinies. Finally, Xiao Yuanjun had used the mystic wonder [Dusk Veil] to briefly deceive Heaven and Earth into treating him and Cui Zhaowei as one.
Fundamentally, the person designated for the [Formidable Enemy Trial] had never changed. It was still Cui Zhaowei.
As for why Wu Yuhei had to fight him rather than Cui Zhaowei...
Put simply, Zhang Yuan had used Cui Zhaowei's information and was currently fighting as her stand-in.
Of course, there were limits to fighting as a stand-in. Heaven and Earth were not so easily deceived. The moment he wielded Celestial Person-level power, the mystic wonder of [Dusk Veil] would fail, and heavenly punishment would descend upon him and Cui Zhaowei.
Zhang Yuan stood with his sword in hand and said mildly, "You dare call yourself invincible in Qi Refining? Quite the boast. Let me test your mettle and see whether you're actually qualified to claim invincibility."
Would using Celestial Person power make any difference?
Obviously not. Either way, it would take just one strike.
While he fought in Cui Zhaowei's stead, Xiao Yuanjun was flying with her toward the Ya Kingdom's Capital City. Once he cleaved Wu Yuhei apart with a single strike, he would follow the link of [Myriad Coexistence] and slip into the Great Void.
He could either travel to Xiao Yuanjun's side or take temporary refuge in the [Heaven-Sundering