After sorting out all the data, Qi Tian realized that he might need to rethink his previous views on this spiritual stone vein. In reality, the total reserves of low-grade spirit stones in the vein were quite substantial, with certainly over a hundred million, if not more. However, another issue ensues: the cost of mining them out was simply too high.
For Qi Tian, this cost mainly involved time. Even if he owned a mine shovel of Innate Spirit Treasure level, it might still take him several years to completely excavate the whole spiritual stone vein.
