Where is the Chaos Monolith Hills?

"Nay...He hasn't courted his death but...sigh. You were inside, so you don't know what he did. Have you ever wondered how he was able to kill that many people in less than three months? Did you ever wonder why the news about his killing didn't spread around?

Because he was like an unstoppable force of chaos. Not a single person managed to escape his grasp and that's why the news of a devil-like him didn't spread around in the testing ground. He also told the crowd...sigh forget it. I can still feel his malevolent display and that terrifying voice. Anyway, Just don't get on his bad side after going to Chaos Monolith Hills. "

...

Talks like this were happening in the crowd while Athan, Shiromi, Sen, Tealery, and Arcued met up with Ayurin, Yone, and the group as they talked to each other.

After Ayurin put up a barrier, none of the people could see or hear them.

" Damn, Athan. You were really scary there. When did you become like that? Hahaha. "