Death zone!
This was not the first time Xiao Mubai had referred to this mysterious place in the Asura Purgatory in this manner. It was just that the last time Feng Qingyang heard him say his father, a Realm Venerable, had made it out alive, he hadn't paid it much attention.
If a Realm Venerable could make it out alive, then he, an existence surpassing the Realm Venerable, naturally wouldn't face any mortal danger.
Chapter 4167