The Stone Embryo Saint Spirit's greatest achievement was becoming an Extreme Dao Supreme. In the Immortal Ancient Era, such beings had been known as True Immortals in waiting.
There was another kind of humanoid stone embryo, formed when an ancient True Immortal turned to stone and awakened after countless ages. A new Primordial Spirit was born, bringing it to life, and once it reached perfection, it could swiftly enter the Immortal Dao Domain.
That was because these beings had originally been True Immortals. In a sense, they were Immortal Corpses that had awakened.
The Immortal Metal Saint Spirit's innate gifts far surpassed those of the Stone Embryo Saint Spirit, standing a whole level above. Such beings were truly children of Empyrean.
The lineage of Immortal Metal Saint Spirits was not limited to True Immortals. It had produced genuine pinnacle Immortal Kings!
During the Immortal Ancient Era of the Nine Heavens and Ten Earths, there had been a Golden Daoist who took form from dawnlight immortal metal. He attained the Immortal King Dao Fruit and endured undying through the ages. Later, he was gravely wounded in the war against the Foreign Realm, and his remnant soul drifted into the Void God Realm, becoming Uncle Jingbi.
This was a solid, proven example.
Immortal tears green gold that awakened and became a sovereign had, at the very least, the potential of an Immortal King. After reaching the end of its first lifetime, it cultivated bitterly to achieve a second, then went to the Heavenly Court to challenge Ye Fan in his eighth lifetime. Though it was defeated within ten moves, there was no shame in that. Losing was the only normal outcome.
After all, Ye Fan had forged an Immortal Artifact in his fifth lifetime and stood shoulder to shoulder with True Immortals.