It seems that there are conduits out in the plains of Iceclad Ocean that are helping the lesser ice shade channel their charming magic. Those foci must have a source near the Tower of Frozen Shadow, and if we can find and disable it, it might weaken the magic cast by the ice shades. I should search near the base of the Tower, and keep in mind that the source is likely under guard.
Search within the Tower of Frozen Shadow for the source of the lesser ice shade's charming magic.
Locate the magical source near the Tower of Frozen Shadow
Return to Jel'ziz Amun
I was able to destroy the source, and have reported my success to Jel'ziz Amun.
I was able to find the source near the Tower of Frozen Shadow, and destroyed it. Perhaps now, the othmir and gnolls fighting the undead in Iceclad Ocean will have an easier time of dealing with their enemies.