While there was only one beast that seemed to have been left behind by a tamer to guard the border, Clark easily took note of other places that beasts might like. Small pools of lava here and there were perfect to hide in. let alone the many black lava stone formations that would be perfect to keep hidden from the rain that was still misting down in the hot landscape.
The temperature had been growing as the group followed the marked pathway. It may have been misty and rainy this entire time, but that didn't help anything. The coolness of rain was absolutely lost when it came to the fact that the mist wasn't even hitting the ground before it heated and became a steamy fog.
This was the source of the fog all over the fields nearby. Why the Lunar Academy city was always covered in fog except for when the air would cool down at night allowing the fog to sink lower and show off the clear starry sky and brilliant moon.