He fixes his gaze on Filii. "Do you know of anything, living or dead, mortal or demon, that has greater experience in the magics of death then I? I've spoken with Lady Death herself on many occasions. Can you claim as much?" He looks back at Fernis. "Not in the way you're thinking. You will tire, from overuse of magic, the sun, and the like, but you need no sleep. Rest in darkness, and strength will return."