Cloudsoar Tower!
There were many ways to increase one's cultivation in the world, but the most common was naturally taking miraculous pills and elixirs.
However, once one cultivated to the Apex Realm, due to the restrictions of the Barren Ancient Continent, it became very difficult for Apex Realm martial artists to find miraculous pills and elixirs suitable for them to consume here.
Even the Yang Hall was extremely short of them in this regard. It was precisely because of this that the Sacred Nation had the Four Great Continents offer many rare spiritual medicines every year, providing them for the Yang Hall disciples' cultivation.
Aside from that, there was circulating one's cultivation method and slowly absorbing the spiritual power between heaven and earth to increase one's cultivation. But this method was extremely slow. Moreover, the spiritual power an Apex Realm martial artist needed to break through a realm was enormous. If an Apex Realm Third Layer martial artist relied solely on absorbing the spiritual power of heaven and earth to break through, it might take at least over a decade to advance by one realm, or perhaps even longer.
Apart from these two methods, Lin Bai had another method of his own: demon blood!
But with Lin Bai's Apex Realm Third Layer cultivation, if he wanted to use the Devouring Sword Soul to refine a massive amount of blood and qi and break through, he had no idea how many demon beasts and martial artists of the same realm he would have to kill before advancing to the Apex Realm Fourth Layer. Moreover, on the Barren Ancient Continent, Apex Realm martial artists above the Third Layer were already extremely rare, and demon beasts above the Apex Realm Third Layer were even rarer!
At least within the Central Sacred Nation, it