Bloodstone.
For Chu Fengmian, what he needs most now is this kind of bloodstone.
After refining more and more bloodstones, Chu Fengmian feels that these bloodstones are far more magical than he imagined.
It seems that the bloodstone contains a unique power sufficient to enhance the bloodline, and Chu Fengmian can vaguely feel it.
The enhancement of his bloodline and the increase in strength are almost simultaneous, meaning that at the moment when Chu Fengmian breaks through to the Heavenly Realm, his bloodline can fully advance.
The benefits brought to Chu Fengmian by that time would be much more than just advancing in realm.
Originally, Chu Fengmian had other preparations, intending to use other spiritual medicines and innate wonders to assist in his breakthrough.
Now it seems that purely breaking through with bloodstones is the best way for Chu Fengmian.
"I don't know how these bloodstones came about, but for me, they are very useful."