Soul Hook is a Yin Bureau Divine Power.
He has already asked people from the "Yellow Springs" organization about this matter.
Not only does the Luo Feng lineage possess it, but now the Underworld lineage, after cultivating the "Six Paths Scripture" and completing enough tasks, can also exchange for this Divine Power.
The requirements for Dao are not that high.
It appears advantageous, but in reality, its nature has changed.
In the past, it was cultivation, building towers step by step, constructing palaces, with hope at the end like a mirage, but it was at least some kind of aspiration.
But now, it has become an appraisal.
Cultivating the "Six Paths Scripture" to its peak is merely the Sixth Layer.
Li Yan doesn't know what exactly happened, but he knows that certain gates have been completely closed.
And this kind of Divine Power is not unique to the Yin Bureau.