Saint Rank, was the symbol of transcending the mortal world. As this divine name implied this was a realm that the great majority of mortals would never manage to achieve.
Iron Bloodline, Bronze Body, Silver Dignity, Golden Will, Respected Legend, World Saint, Immortal Myth, and Indestructible SemiGod, this was the classification given to each power rank for the Mortal Plane, as well as a way to separate how much personal potential each person had developed.
Since the great majority of humans in the Mortal Plane were far too weak, this power level ranking system was far too detailed in the weaker ranks, but overly vague for the higher power levels. As the Elemental Tide increased at a furious pace and average power levels rapidly rose, this power level ranking system would start showing its outdatedness.