After advancing through the pitch-black underground tunnel for about an hour, Luca finally found a passage that led even deeper down.
The passage was incredibly steep. Before entering it, he deliberately tossed a small stone inside.
The pebble rolled downward for a long time; the sound it made did not stop abruptly but gradually faded until it disappeared into the pitch-dark depths below.
Luca's expression grew grim.
The sound of the stone meant this steep passage went very, very deep.
"Are we really going in there?"
Sophia's voice suddenly echoed, her tone betraying her anxiety.
Luca nodded without a word.
Then he stepped directly into the steep passage.
Going down such an incline was extremely dangerous.
The tunnel walls were slick with moisture, so Luca had to drive the blade of the [Dragon-Slayer Greatsword] into the walls themselves to keep from sliding straight down.
Progressing through this kind of passage was both time-consuming and exhausting.
