The scale of the tunnel was larger than Mephistopheles had imagined. Even if dozens of them walked in one after another, they wouldn't feel crowded.
Such a structure might have been designed for transferring troops in the first place. As for whether Olihagan dug it himself or it existed here before, that was unknown.
"It's really impressive that you could find a place like this... Where does it connect to when you exit from here?"
"The rear of Magitech Copper Mountain Castle."
"The rear... Wait, the rear of the castle? Such a central location?"
"Yes... Is there a problem?"
"..."
Mephistopheles looked at Little Evil, who had a puzzled expression, as if looking at something difficult to explain.
"Do you think it's not a problem for you, as a slave, to casually reach the surroundings of someone's headquarters?"
"Hmm... I don't know."
