Bolt of glory should not make NPCs that cannot fly flee into air rooms. If they cannot flee in that direction they just shouldn't flee.
Code:
[HP: 97%] [ME: 93%] [PE: 97%]
>
You utter the words, 'barh ay ohifl'.
A bolt of light bursts forth from your hand!
An elder female mistling cringes in terror from your bolt of glory!
An elder female mistling darts southeast.
An elder female mistling has fled!
[HP: 97%] [ME: 89%] [PE: 97%]
> Cast the spell on whom?
[HP: 97%] [ME: 89%] [PE: 97%]
>
l
Atop a Sky-Rock
The rocky surface of this plateau appears smooth towards the center of
the area. Sharp, ragged edges jut out of the ground along its perimeter,
defining some natural boundary. A misty vapor looms about, covering the
island in a blanket of gray that significantly lowers visibility. With each
gust of the wind, the vapors awaken from their slumber, dancing about with
mystical eeriness. The crustal ground is lined with deep cracks and emits a
pleasant, silver glow. Geysers shoot out of the schisms from time to time,
spurting steam and water particles all over the plateau.
It's snowing lightly, numbingly frozen, and breezy.
Obvious exits: n e s w ne se
(Charmed) A silver-winged pegasus stands here looking majestic.
[HP: 97%] [ME: 89%] [PE: 97%]
>
l se
You see A Fluffy Cloud.
An elder female mistling, an elder male mistling, an elder female mistling, an elder female mistling and an elder male mistling are nearby southeast from here.
An elder male mistling is not too far off southeast from here.
An elder female mistling is a long ways off southeast from here.
[HP: 97%] [ME: 89%] [PE: 97%]
>
stand
You are already standing.
[HP: 97%] [ME: 89%] [PE: 97%]
>
l n
You see A Storm Cloud.
An elder male mistling is nearby north from here.
[HP: 97%] [ME: 89%] [PE: 97%]
>
c flame se mist
You start to concentrate.
[HP: 97%] [ME: 89%] [PE: 97%]
>
You utter the words, 'yrawzgculatz'.
An elder female mistling avoids your flame column, narrowly avoiding certain death!
[HP: 97%] [ME: 84%] [PE: 97%]
>
se
You aren't flying.