The third stage would naturally be proficiency, mastery and expertise. Proficiency in muscle coordination, mastery of Will, as well as expertise and exploration of the force field.
Until now, Luo Yuan had still been on the verge of exploring the force field. He thought that it had something to do with feeling and perception. When one reached that stage, the effect of a system upgrade would be minimal, while the effects of proficiency, mastery and expertise would vastly differ. Usually a one point increase in skill points would have the same value in a skill upgrade, but when it came to the expert level, a skill would need at last three additional points in order to upgrade. Therefore, the upgrade would be three times as slow. If one depended on the system to breakthrough to the expert level, that would meant that they would need an additional 60 skill points. It would take 12 upgrades to get those points.