Cultivation in the Qi Refining realm chiefly involved just two things.
One was continuously refining and compressing Law Power.
The other was continuously expanding the space within the Dantian.
The former was an important basis for dividing Qi Refining into ten layers. Each complete compression of one's Law Power counted as advancing one layer.
After nine compressions, gaseous Law Power became fully liquid. This was the tenth layer of Qi Refining.
It was also one of the thresholds between Qi Refining and Foundation Establishment.
The latter, meanwhile, occurred naturally as cultivators refined their Law Power.
Different cultivation methods also opened up Dantian spaces of different sizes.
In theory, the larger the Dantian space, the better. After all, more space meant more stored Law Power, which could offer an advantage in an actual fight.
The Ren Water Fourfold Command Art had quite an advantage in this respect. Its mixed Spiritual Root attributes greatly increased its demand for Dantian space.
Of course, every upside had a downside. Filling the Dantian naturally required more Law Power, effectively slowing the rate of advancement.
This was also one reason single Spiritual Roots and twin Spiritual Roots were more popular, classified as high grade and middle grade respectively.
After all, cultivators valued their cultivation realm above all else. With limited lifespans, advancing sooner was naturally better.
Overwhelming others with a higher cultivation realm was what most cultivators aimed for.
Wang Ba knew all this like the back of his hand.
Thus, he also knew perfectly well that with his aptitude of four Spiritual Roots and his cultivation at the first layer of Qi Refining, completely compressing his Law Power to break through to the second layer of Qi Refining might take several months if things went smoothly.
If they did not, even two or three years