No, it's not a smell!
The reason for the odd sensation was because this "smell" was actually a feeling.
Zhou Heng noticed that his strength was slowly fading, and even his Inner Qi showed a slight, imperceptible tendency to become dormant. At first, it didn't seem like much, but over time, it would definitely lead to a complete loss of strength, making him weak all over, and even moving would be difficult.
Poison gas?!
Colorless, shapeless, tasteless, it sapped a person's strength and softened muscles and bones. If it hadn't been for his Insight +1 as a basic attribute bonus, he would likely have had just as much difficulty in detecting it… Was this the "Formless Qi Dispersal Powder" that the Three Poison Sect sold to Wei Gaopeng, the Young Master of Shocking Thunder Manor?
Zhou Heng thought of the letters he had found on the body of someone from the Three Poison Sect, as well as the information Shen Jingjing had given him.
However, wasn't this effect a bit weak?