Spiritual treasures were not a secret in the Spiritual Race or the Blue Star humans. They already had an understanding of them.
The difference was that the Spiritual Race had many spiritual treasures. The Blue Star had only seized one or two of them. Currently, they had only studied them and had not produced any physical items.
However, the source was already clear. It was actually just another form of the Origin Crystal ability seal card.
The Origin Crystal ability seal card was made with special Origin Crystals with specific attributes. After being made, the power it could unleash was a major level lower than the creator.
For example, the ability card that Cai Shaochu made, who was now in the Nine Satellites, could only unleash the power of an Eight Satellites Planetary realm when Xu Tui uses it.
This was a natural attenuation limit.
