Purple spiritual light

Purple spiritual light is a rank seven immortal material. It is not gathered from white heaven; it originates from deep underground ores. Xia clan holds the most purple spiritual stone lodes in the five regions and treats this trade as its number one source of revenue, keeping firm dominance over the business. ^{ch. 1607}

Xia clan keeps an explicit identity stall for purple spiritual light in treasure yellow heaven so buyers can find the signature product by reputation. Fang Yuan contacts that stall with an information path Gu worm carrying a ransom note, and later his will returns there to take one million immortal essence stones from Xia clan. ^{ch. 1607}