"Ho…"
On the right side, Noel could actually see a hallway that was far different from anything he had ever seen.
This hallway was separated into three parts. The left and right part was made of normal stone where people could walk on them. There were even some papers stuck on the wall as if showing someone's research.
But the middle part amused Noel. It was made of a huge block of stone that kept moving automatically with Spiritual Energy.
"This is…" Noel muttered while approaching this weird, moving stone.
"This is one of the technologies we have found from the demon territory. We call this one 'Moving Pathstone,' The principle is pretty simple.
"We link up a few big smooth stones together and make them move in one direction. And at the end, they will go down and move backward. Repeat the process and you will get this Moving Pathstone."
"I see. It's pretty unique." Noel nodded with a serious expression.