Zhou Feng could quickly increase his cultivation with the first two methods.
In fact, there was another more direct method, but there were too many uncertainties.
That was to obtain more passive skills.
If Zhou Feng could obtain more passive skills, his strength would increase.
However, quickly obtaining passive skills was a problem that was worth studying.
At present, he had discovered that the skill panel's progress bar would speed up if he absorbed a large amount of Spiritual Qi. Other than that, the progress bar would only speed up through the Demon-Devouring Gu and Soul Harvesting.
Thinking about it, if he wanted to speed up the progress bar, he would basically need to obtain additional energy?
Zhou Feng made a simple guess.
Extracting a passive skill required energy, and the skill panel could only obtain energy through Zhou Feng.
