Following the blue light, the smell of ozone getting stronger as you draw nearer. Nia would assume her usual role of advance scout, her main thinking being she should have a good chance of spotting approaching danger before it gets the main group.
Depending on the size of the group headed to the cave, she would range far ahead of a larger group, and stay closer to a smaller group.
As you ascend the hills, more and more trees appear stripped or blasted…
Nia would wonder about the effects on local creatures… are there signs that animal life survived this event? Or is at least returning to the area? If wildlife is gone and not returning….well, that would be a bad sign.
…with a brighter blue emanating from a natural opening…The grass and plants in this immediate area are scorched…
As soon as this was in sight, Nia would focus her attention on the immediate surroundings of the cave opening. She’d be trying to divine if the scorched plant life is recovering or utterly dead - and if the plants appear to be progressing normally into desiccation/decay/recovery or if there is still some effect that is harming the surroundings that could still be a danger. Nia is keen to explore the cave, but she’s not luring her group to enter if she senses something malevolent is still active…