I Can Exchange For Comprehension

Introduction: Gu Qing traveled through time.

He was shocked to find that this was a world where monsters were rampant, demons were dancing around, ghosts were everywhere, and human life was worthless. If he wanted to survive in this twisted and ferocious world, he could only stop killing by killing!

Gu Qing discovered that by killing demonic creatures, Yin energy can be obtained.

He used Yin energy to quickly become stronger. From then on, he embarked on an unprecedented path of spiritual practice, overcoming all dissatisfaction.