Spirit stones were divided into red, orange, yellow, green, cyan, blue, and purple. Red Spirit stones contained the lowest amount of spirit Qi, while purple spirit stones contained the highest amount of spirit power.
The people here were born with the ability to sense spiritual energy, so purple spiritual stones had been excavated in large numbers many years ago.
Although spiritual stones were renewable, they needed to be accumulated over the years and could not be excavated without restraint.
Later on, the big forces on Emperor moon controlled the high-grade spirit stones and only distributed them to their own forces. Those who were not as powerful would gradually lose their chance of obtaining high-grade spirit stones. In the end, if they wanted to obtain high-grade spirit stones and train experts for their families, they could only rely on the large forces or find other ways.
