Impressive

Carion then explained, "The Under Desert Sea is located several kilometers underground. There's no such thing as a direct passage there, except for the ones where you'll find guards protecting. However, that doesn't mean we have to take one of those passages. We can literally dig our way down and connect to the Under Desert Sea."

Rean couldn't help but ask, "If it's that easy, wouldn't anyone from Pol Continent also be able to enter Treavin?"