After reading it, the master of the Azure River Ancient Sect said, "Heaven-Opening Aurora is far too scarce. Our Azure River Ancient Sect has accumulated it for many years, yet only one strand remains."
"Top-grade Five-Element Thunder Sources are even rarer. Within the West Qi Divine Abyss Sea, I fear only the Ten-Thousand Tribulations Thunder Domain may have them. We have none in our possession."
"We do, however, have a piece of Primordial Ancient Copper, which can count as one of the items you require."
With that, the master of the Azure River Ancient Sect handed the Primordial Ancient Copper and that strand of Heaven-Opening Aurora to Chen Nianzhi.
This Primordial Ancient Copper was top-grade earth-element immortal gold, suitable for refining the Earth Sovereign Bell.
As for the Heaven-Opening Aurora, Chen Nianzhi naturally intended to use it to advance his Five-Color Divine Radiance.
Chen Nianzhi had cultivated the Five-Color Divine Radiance for many years. His understanding of this divine ability had already surpassed the sages of ancient and modern times in the Purple Yin Realm, and he had deduced it into the domain of a Profound Mystery-grade divine ability.
Similar to Primordial Unity Qi, the Five-Element Divine Light required an incomparably precious treasure if it was to reach the realm of a Profound Mystery divine ability.
That treasure was the first aurora born between heaven and earth when the world was first opened.
Heaven-Opening Aurora was a Heaven-Opening rarity, but its value ranked at the bottom among such rarities. It was roughly equivalent to a top-grade immortal treasure and was not especially expensive.
However, Chen Nianzhi's Five-Color Divine Radiance required five strands of Heaven-Opening Aurora, each one possessing one of the five elements.
Such Heaven-Opening rarities could only be born when heaven and earth first came into being, making them