A lot of criteria had to be satisfied before this kind of stone could be formed. The gem itself didn’t contain a lot of magic warrior power like magic cores or energy stones. However, it had a different use. After finding a Magic Forge Master and getting it processed with a lot of special techniques, this gem called Son of Earth could absorb the warrior power from energy stones or energy cores and purify them to a great degree.
After a warrior used up a lot of their warrior power, they could only find a place to self-regenerate or use an energy stone or energy core to speed up that process. But if he or she had a Son of Earth gem that was reforged by a Magic Forge Master and fully charged with warrior power, they could instantly suck all that warrior power into their body and use this newfound warrior power instantly!