[ Circe shrugs. ] I arrived with some of this, and for the rest, I have had little else to occupy myself with.

[ Also, she feels completely defenseless without a good store built up, so Circe has been prioritizing it. This is what she has that she thinks might be relevant or useful to this spell. ]

It will not be so difficult to focus it to Atropos. If she did not want the limitations that come with being known as a god, she should not have called herself one, whatever she is. We all have things we are known for. Belladonna and snake venom will serve for her.