"That has never been recorded, it would be impossible." Harvina laughs, but stops when she meets Hermione’s eyes. " I suppose it would be more likely for someone to create a horcrux and then attempt to create a phylakterion, as it would allow for more horcrux to be created, essentially, and for their splintered soul to be sustained by the captured soul. But so much could go wrong doing that, and I don’t know if there’s anyone power-hungry enough to try."