C1654 I've Come to See You

Baleful Qi was a type of spiritual Qi of Heaven and Earth. When it reached a certain level of density, it would be infected by the evil energy of the outside world, and thus become a special kind of spiritual Qi.

Under normal circumstances, only a very powerful Yin Land would produce a tiny bit of Baleful Qi. It was extremely rare to produce Baleful Qi in an environment where people lived