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This quest is broken. Giving her a bat fur, a rat whisker, and a fire beetle eye results in her saying:

[Wed Jul 24 16:43:14 2019] Caleah Herblender says 'All right. Remember, I need all three ingredients to test this spell out. Keep up the good work, Buggo'
[Wed Jul 24 16:43:14 2019] Caleah Herblender says 'All right. Remember, I need all three ingredients to test this spell out. Keep up the good work, Buggo'
[Wed Jul 24 16:43:14 2019] Caleah Herblender says 'All right. Remember, I need all three ingredients to test this spell out. Keep up the good work, Buggo'

Giving her the additional rat whisker results in:

Caleah Herblender says 'Hmm. Good job, Buggo, let's give this a try. Flame and fire. Heat and spark. Touch of Ro, light this dark! Ahh. It stills needs a little work, I guess. Thanks for your help, here's a little something for your effort.

No faction, no "little something."

Also, she randomly says

Caleah Herblender says 'Hmm.. Let's see if we can find someone to help replenish our stock of [rat whiskers] and [bat fur]. I need these items for a new little experiment I'm working on.'

Asking about rat whiskers or bat fur results in:

Caleah Herblender says, 'You can probably find some outside the city gates... in the hills and plains.'

There is no mention of a third ingredient, the fire beetle eye.