"Six Yin Netherworld Immortal Scripture"
This is an immortal sutra transformed from the cultivation skill of underworld ghost creatures. Upon its mastery, a human body can transform into a Yin Spirit of the Immortal Way, comparable to Donghuang, but far inferior, as Donghuang is innately born while this becomes an acquired Yin Spirit, ending up in the lower ranks.
A normal cultivator, who is foolish, would turn himself into a Yin Spirit, unless there is no choice. However, it is possible to understand that if one manages to refine himself into a Yang Spirit, that could directly lead to the path of everlasting life, thus it would not be regarded as heresy.
Shed the mortal body!
Cast away the mundane mortal being, and ascend to the Immortal Way!
The cultivation at this realm is much more difficult for Feng Qing'an. Normal cultivators, upon reaching this realm, would face a choice, should they continue being human?
