Wang Teng had done his homework.
Energy stones were formed by congregating the Force within the heaven and earth into the minerals. These minerals were buried deep beneath the earth due to the special terrains. After a long period of development, these minerals slowly turned into stones with Force crystals.
They were mostly found in the Xingwu Continent.
The earth was only invaded by Force 30 years ago. It hadn't been long enough to form energy stones.
As for spiritual dan, they were formed by alchemists who fused all kinds of spiritual herbs and medicines using special methods. These spiritual dans had many different uses.
Only martial warriors were able to use these two resources, though. Of course, they also played a vital role for advanced stage martial disciples seeking to breakthrough into martial warriors.
