It was thanks to the degradation that we managed to find the objects hidden beneath the crevice, however, even with its current state, we only realized there was something in there due to mild fluctuations that didn't reveal much other than a slightly abnormal spike in spiritual qi quality.
In its current state, the array can fool even the domain sense of a first-stage domain expert.
The design and origin of the array is unfamiliar to us. However considering how long it has been able to remain intact and functional, despite degradation, the skills of the one who laid it is undoubtedly someone at the top tier of gold grade or a purple grade formation master.
The array itself was strange enough but inside there were even stranger things.