This time, without Wei Wuming's explanation, Ling Chuxi could already guess the reason. Not only were the invisible vortexes dangerous, but they also distorted light. On the surface, they looked transparent, but what one saw through them was not the scene in front of them at all. This was the same principle as an illusion.
An illusion spell was also a type of magic spell. It used vital Qi to distort light to confuse people's vision. However, due to the existence of spiritual awareness, such an illusion spell had no practical value in battle. Its greatest use was to make people laugh at it after a meal.
