"Mostly a lot of Thestral shit. Philosophical rantings of wizards afraid of death. But in there, there was some insight. In theory, if a witch or wizard with enough magical potency felt enough grief—if it was a consuming, hopeless, pitch black form of grief—that grief could manifest into tangible magic. The kind of magic that could traverse worlds. The kind of magic that could reach out to the other side and wake things up that should never have awoken."