Surrounding this peculiar land that resembled an upside-down bowl, stones of considerable size had been heaped up to build it.
The shape of these stones was regular, seemingly quarried on purpose for use as material.
Moreover, within these stones, there were even traces of spirit Qi.
Though the spirit Qi contained in these stones was not abundant, it was enough to prove that these were not ordinary stones.
Instead, they were a type of spirit mine that was not too precious.
However, this evaluation of "not too precious" was only from He Song's perspective.
If those at the Foundation Establishment stage, and even those at the Qi Refining stage, were to see them, they might exclaim in surprise immediately.
After repeated comparisons by He Song, he soon had an answer regarding what these spirit mines actually were.