The effects of the Illusionary Poisonous Smoke are extremely abnormal. This poison will cause poisoning if it simply comes into contact with the skin, and even those in the Marrow Refining Realm will fall victim if they don't take precautions in time.
Once poisoned, whether human or beast, they will fall into a frenzy and launch indiscriminate attacks on nearby targets.
The Illusionary Poisonous Smoke is extremely precious. After all, Marrow Refining Realm beasts are not easy to come by. Ordinary members of the Marrow Refining Realm in the Thousand Poison Sect aren't qualified to possess it; only elders have the privilege to use it. The four from the Thousand Poison Sect didn't expect Wu Gui to actually give the Illusionary Poisonous Smoke to Wu Xinyu.
Watching Lin Miaomiao and the others hack each other in the Illusionary Poisonous Smoke scared the few onlookers. If they had been a moment slower, they would have ended up just like Lin Miaomiao and the others.