C484 Dealing with yin by using a knife

Right at this moment, when Ma Wuyan's palm was about to land on my chest, a black wind suddenly blew, and a red figure suddenly appeared behind Ma Wuyan.

I only saw a flash of black light, followed by a "Puchi!". As soon as the voice sounded, Ma Wuyan, who was about to pat my chest, stopped in that instant. At the same time, his eyes went still for a moment