Of course, Ye Ping'an understood that nothing was absolute. But he still held a soul fragment of the True Knowledge Immortal Emperor in his hand. With that item, even if the True Knowledge Immortal Emperor truly managed to be reborn, he could use it as leverage...
Moreover, because Wei Lai had received the inheritance, he knew quite a few secrets unique to the True Knowledge Immortal Emperor. They could use those secrets to truly unravel what lay within, find the Cave Mansions' precise locations, and discover how to enter them.
The Cave Mansions left behind by two Immortal Emperor-level powerhouses might mean nothing to you; you would not make a special trip merely to seize their treasures. But to Ye Ping'an and the Quasi-Emperors following him, they were astonishing opportunities. Even those capable of cultivating to the Quasi-Emperor realm naturally possessed some Fortune and had encountered countless opportunities, but none could compare with an Immortal Emperor's Cave Mansion.
Especially since Ye Ping'an had only just led the experts into the Underground Palace, and merely one contingency casually left behind by the True Knowledge Immortal Emperor had already yielded so many treasures. This further bolstered the other cultivators' morale, and in their excitement, they all became intensely curious about the other two Cave Mansions.
Of course, if this had happened under ordinary circumstances, and someone told these shrewd Quasi-Emperor cultivators that there was a Cave Mansion treasure trove left behind by some Immortal Emperor Great Power, they would most likely have kicked that person away. This sort of trick had played out in the Three Pure Heavens too many times to count. Even in a chief heaven as prosperous as the Three Pure Heavens, truly discovered Emperor-realm Cave Mansions were few and far between; more than ninety out of a hundred