Particle accelerator, and converter

There were several hyper-intelligent individuals in this group, both people and demons, yet neither of them fully understood the science behind the caverns they found.

This pocket of space looked like it suffered an ice age, but it wasn't quite so. The team picked up small hints already, details to be exact, but they had not yet figured out why these caverns were so unusually cold.

They followed Andena at the moment, and she led them towards yet another cavern, which was right below the second one they crossed. This one was a bit bigger in comparison, as it stretched approximately a hundred meters long! As for width, the measurements were similar. 

Much like it was expected, the walls of ice here were even more clear. The team could see their full reflection, and were rather intrigued by the details; Mirrors were unheard of across these lands, after all.