C537 Horrible Engineering

After Xiao Yun saw it, he increased his speed and rushed forward.

However, when Xiao Yun entered the building, the octopus monster suddenly spat out a jet black mist. In the blink of an eye, the octopus monster disappeared from sight and Xiao Yun's mind was unable to track it down.

"Strange?"

Xiao Yun really did not understand how that octopus was able to do it. After the mist gushed out