In SoN's tilt yard scene, Louisa tells Hancock that Diana will bring down the de Clermonts, fulfilling Gerbert's ancient prophecy to Ysabeau. "Beware the witch with the blood of the lion and the wolf, for with it she shall destroy the children of the night." This is never mentioned again. I understand the first part, but what is the significance/intent of "...she shall destroy the children of the night?"