...
At the end of Dragon Castle's secret passage lay a small mountain range in the western part of Blood Sand City.
Purgatory's terrain was typically comprised of mountain ranges and hills, but seldom were there extensive mountains or high plateaus.
Since most demons naturally mastered some ability to fly,
the environment in Purgatory was not suitable for hiding.
Pursuers merely had to fly over the low mountaintops and the terrain below would be entirely exposed to view.
However, this mountain range was somewhat different.
As soon as Matthew emerged, he noticed a light green mist enveloping the mountaintops and valleys.
Within that thin mist,
grew a large number of green Devil Vines—
These Devil Vines possessed a certain self-awareness and quite basic predatory intelligence and were one of the unique species in Purgatory.
Of course, they posed no threat to Matthew and others.
Moreover, the growth of these purgatorial plants provided good cover for escapees.