The Dragon Slaughter Tower itself is an important source of Dragon Qi, but Chu Nan cannot fully control it, cannot exert its full power, and certainly cannot devour the Dragon Qi contained within it.
Chu Nan could only absorb the Dragon Qi that the Dragon Slaughter Tower devoured from outside.
So for Chu Nan at this moment, if he wants to enhance his Dragon Qi, the best way is to return to the Imperial Capital and obtain Dragon Qi from the Royal Family to devour.
But there is no doubt that obtaining Dragon Qi from the Royal Family is extremely difficult.
As for strengthening the Yin Yang Cloud Sea, it's even more difficult, as the Yin Yang Power exists only in the space where the Yin Yang Daoist is sealed in the True Martial Holy Hall.
But the Yin Yang Daoist is a Heavenless Realm being, even sealed, his power is extraordinary, and Chu Nan does not want to confront him head-on.
