Holy Land Genius

Seeing how calm the duo were, especially Cain's causal smile, Du Hu refocused her intent pressure specifically on Cain. 

A subtle killing intent attempted to prick in and assault Cain's mind. His eyebrows curled while his eyes gleamed in a chilling, cold light.

Something like this, especially from a Late Stage Divine Star expert, could certainly seriously disturb a cultivator's thoughts and confidence. It would be a powerful mental attack if a cultivator's Divine Will wasn't firm as the one projecting the killing intent. 

A cultivator's fortitude plays an immensely huge part in all aspects of cultivation. Whether its regular cultivation or battle, the state of a Divine Will can be a strong turning point. 

For a crazily determined person like Cain, any killing intent he ever experienced was like a light breeze that only tickled the skin.