Agreeing with Nan Tian, Isilia could see his reasoning behind it.
"However, at the first sign of danger, we're going to leave immediately ok? I'm going to ask Shiro for two teleport orbs so that we can teleport to the peak of the mountain and notify her of the first sign of danger." Isilia said since any monster that have lived in such a mana rich zone would be very strong.
"Mn, I'll wait for you here while you go ask Shiro." Nan Tian said as he nodded his head.
Watching Isilia make her way back to Shiro, he glanced back at the cave and narrowed his eyes.
While his senses couldn't probe far into the cave, he could definitely tell that the mana density was becoming thicker as mana had even started to liquify within the cave.
Walking up to the walls, he could feel their dampness as a thin layer of liquid mana glistened on their surface.