Iron Bloodline, Bronze Body, Silver Dignity, and Golden Will were the separate ranks the humans had created for each power level, and each rank contained endless amounts of hard work, blood, and tears.
The Silver and Gold Races didn't have any need to classify ranks in such a manner as they were innately born above the so-called Silver and Gold. In their eyes, possessing such low-ranked power classifications was no different from giving their children power classifications, something which was deemed entirely unnecessary.
Yet, for humans, each rank represented a foundational change in the warrior's power level.
Iron Bloodline and Bronze Body—these names were already self-explanatory. Human mages at these levels could create mana circuits within their bodies, while warriors could utilize their bodies' potential. "Bronze Body" was synonymous with "perfect body."