Reimu's first thought was to keep the imps from surrounding her.  The air in the cave didn't seem that bad, a fight like this would likely last a few minutes at most, and she had been able to stay here for hours without too many problems.<br/><br/>She shook her head as she thought however, swearing as she remembered the casters.  They wouldn't be hindered at all by close quarters, and in fact she'd have a difficult time getting to them to stop their spells, without any sort of ranged weapons or magic.  Deciding to go out to the open, she rushed to the entrance to the cave.  Once again, she hid just around the corner once she was outside, ready to shock the next imp to come near.