A young disciple of the Green Mountain was waiting for the attack of the Underworld Emperor in a careless manner. Anyone would think it ridiculous, including the Underworld Emperor himself.
"You have been locked up for too long."
Besides this remark, Jing Jiu didn't give any further explanation.
Anyone who had been imprisoned in the Fiend Prison for six hundred years would have had their Cultivation state damaged to a great extent.
Most of all, this seemingly comfortable green valley was still a part of the Taichang Prison. This place was isolated from heaven and earth, devoid of the Underworld River and the Underground Fire, so he couldn't cultivate here. What had actually occurred to the Underworld Emperor was that the yuanqi, or Soul-Fire, in his body had leaked out little by little over time, scattering into that patch of the dark space.