 Mavra, having survived so many centuries despite the devastation of her kind, is extraordinarily powerful, devious, and a proven survivor.In addition to her supernatural powers as a vampire, she is as skilled in the use of magic as a full-fledged wizard and has been a threat to Dresden a few times throughout the novels since her introduction in "Grave Peril".Mavra was apparently destroyed by Dresden in "Blood Rites", but actually survived—what Harry killed was one of her underlings, which she used as a decoy.