Vaan traveled five kilometers into the seven-kilometer-long passage before opening up a new inclined path that stretched for another thirty-four kilometers, connecting to a different rare metal deposit.
However, he didn't reach the second rare metal deposit before opening up another inclined pathway leading up to the next closest mineral deposit.
He repeated the same step until he linked up a few dozen mineral deposits and was five hundred kilometers closer to the surface. There, he finally discovered some soil among the endless layers of rocks.
Ding!
<Analyzing soil composition…>
<Soil composition analysis completed>
<Soil composition: 32.67% limestone powder, 29.51% carbon dust, 17.87% humus, 6.63%...>
'As expected, there's a fair bit of humus,' Vaan mused.