Chapter 444: Accident 405 Three

Watching the small door on the ground gradually turn into black ash, along with the key, disappearing completely without leaving a trace.

Clearly, Professor Mimam had set up some sort of special self-destruct mechanism, which would activate automatically in case of unforeseen events.

But this meant that the way and passage for his return to Earth-Moon here were completely gone...

Li Chengyi stood still for a long time, unable to recover from his shock.

His mind was racing, trying to figure out how to return to Earth-Moon.

'No, there is still a way. The Celestedge Doomsday Art was able to be passed on to Earth-Moon, so there must be some connection with Earth-Moon here. Of course, it could also be someone who has been to this place and brought the technique over, but that possibility is very small. Such a divine technique, if someone were able to bring it over, they would not be unknown in Earth-Moon after cultivating.'

Hope once again rose in Li Chengyi's heart.