Yu Ji was very cautious in his actions.
After all, it was a matter that concerned the great affairs of Qingwei Heaven Sect, and if this stone of unknown origin contained any unspeakable secrets, wouldn't it mean stealing a chicken only to lose the rice?
Hence, they did not hesitate to spend a great deal of time conducting an extremely thorough inspection of the stone.
Especially Zhou Xuan, although he was not the founder of the Heaven and Earth Catastrophe Formation, he had been responsible for its maintenance for over thirty years.
His understanding of the Mysterious Stone had long surpassed any expectations.
Yu Ji and Zhou Xuan, facing the newly acquired Divine Stone, tested it with Divine Sense, surveys, Spiritual Testing, and various other methods.
But the more they tested, the more surprised and delighted they became.
No wonder Junior Brother Xu mistook this stone for the Mysterious Stone lost by their Qingwei Heaven Sect.