"Advanced Affinity of Faith Power," should be the manifestation of Lis's enhanced soul from the second round of trials.
As a Priest of the Wisdom Church, Lis spent ten years studying the Divine Arts. His soul was long immersed in the Power of Faith, greatly raising his affinity with it. This change would also be reflected in the outside world through Lis's spirit.
However, it wasn't of much use to Lis now. After obtaining the "Sphinx Ascension Technique," Lis's goals were no longer limited to becoming a Legend.
Given such an opportunity, Lis even considered giving up the Priest profession specialty he was preparing to acquire in favor of one that would aid the Ascension Technique. But he hadn't decided which specialty to choose yet, so he would have to plan it out slowly in the future.
As for "Tenacious Will" and "Soul Ascension," they were the most direct and clear upgrades for Lis, and definitely his favorites.
