The Seven-Colored Fire Core Sand was about the size of a longan fruit stacked in a triangular shape. According to ancient records, the Seven-Colored Fire Core Sand had seven colors, which corresponded to the seven types of fire-elemental laws known as red, orange, yellow, green, indigo, blue, and purple. The Seven-Colored Fire Core Sand was an extremely rare fire-elemental law material, and its power was a level higher than that of any kind of deviant fire of heaven and earth. It was something that could truly burn the heavens and refine the earth.
Furthermore, it was nurtured by the heavens and earth, and it was born in a place that could be tens of thousands of feet high in the Nine Heavens, as well as deep underground in the depths of the Nine Serenities Valley. There was no way to trace or refine such a treasure, and it was a treasure of heaven and earth that was comparable to something from the heavens.