Blood magic, is what some of it may look most like.

[ Which. Is a whole other barrel of worms, and why Isaac had seemed the right confidante for this. (That, and he seemed to know what he's doing.) They aren't in Nevarra anymore; magic or no, he doesn't want Sidony toeing a line she can't get away with here. ]

It may be enough simply not to rely on her if a patient is in a precarious position. She might not appreciate that, but I would rather her first mistakes not be lethal ones.