Zhao Hai had no choice but to let Hu Xiang help him with the experiment. It was useless for him to talk about how strong the illusory formation was. Only by letting those people experience the power of the illusory formation would they understand what was going on.
It must be said that an illusion array was not a great thing in the outside world. Even if people with strong spiritual power or people who had studied array techniques could not break an ordinary illusion array, it was not easy to kill them with an illusion array.
However, don't forget that this was the soul world. The people here in the soul world did not have strong spiritual power. It would be very difficult for them to break the illusion array.