C36 It Was Better to be the First to Strike

By the evening of the tenth day, Shi Ziling had already broken through his mental strength to the fifth level. Although it was still far from the highest realm of the ninth level, it was already possible to use true essence and soul force together.

Shi Ziling was overjoyed. A few days ago, he tried to use the "Ethereal Demonic Sound" cultivation technique in an uninhabited forest