The lowest grade of treasures like these was sixth-rank high-grade. For example, the core of the Purple Yin Realm would surely nurture a small number of Nine-Heavens Star Cores.
Within exceptionally powerful stars, such as the mythic Purple Tenuity Star and Radiant Light Star, the Nine-Heavens Star Cores they nurtured could even rival innate spirit treasures.
The reason Emperor Jiang's natal immortal sword had once advanced into the realm of an immortal treasure was said to be because it had obtained an incomparably precious immortal-rank Nine-Heavens Star Core.
It was simply that Nine-Heavens Star Cores developed exceedingly slowly. To nurture one to the immortal rank required an incomparably long span of time.
The Purple Yin Realm was among the most outstanding major worlds of all the heavens and stars, yet even it needed several tens of millions of years to nurture a single immortal-rank Star Core.
Apart from being naturally nurtured by stars, the only way to obtain a Nine-Heavens Star Core was to destroy a star.
It was said that, in order to obtain Nine-Heavens Star Cores, many Outer Realm Devil Gods and evil-path immortals had not hesitated to destroy the stars of the nine heavens to obtain them ahead of time.
The Outer Realm Devil Gods of the Purple Yin Realm had repeatedly scattered Nine-Heavens Star Fragments to form forbidden zones for demonic cultivators. This showed that they had once destroyed at least one star beyond the heavens for this purpose.
When the Jade Balance Star Lord heard him mention Nine-Heavens Star Cores, he could not help but shake his head with a bitter smile. "How precious are Nine-Heavens Star Cores? If our Star Palace had any, we certainly would not put them up for sale."
"However, we do have a few Nine-Heavens Star Core fragments. They are