This past month, Gao Ziyun felt something was amiss, because he'd secretly visited the Desert Dynasty ruins several times to study the prohibition formations, but couldn't unlock them,
His attainments in array formations didn't differ much from that of the Medicine Saint, and he couldn't fathom how the Medicine Saint managed to crack the super formation and enter.
He thought either the Medicine Saint had a stroke of luck or Lin Yifan had been the one to crack it and then deceived the Medicine Saint into entering.
Though this idea seemed laughable, it didn't mean it was impossible, especially since Lin Yifan's previous actions had made him suspicious, as if everything was proceeding according to a plan.
So he decided to conduct a covert test, to see if Lin Yifan would reveal the truth.
On the other hand, since it was a secret meeting with the Great Elder, there was no reason not to go.
Thus, Lin Yifan went without hesitation.
