she has a deeply tricky nature and would be immensely capable of this, but the abilities of the finfolk don't extend to laying curses as far as i've read. in fact, she'd be quite the lethal handful if her abilities did allow that over the centuries. a collaboration with the dome seems more likely, especially in her seafaring years when she was running across supernatural beings of all types—at one point she even couriered unguent and her devotees to the new world via ship. could we manage a link where she was the primary porter for vampires traveling the ocean for a span of decades, centuries, even? her reasoning could be that once she started meeting other supernatural beings, she likely set out on a mission to find the seed of the source and came to acalod while following some convoluted journey of riddles and maps? this would probably take place in the early-to-mid 19th century, if that works for you!