"A use-name is an alias of sorts in occult circles. True names have the power to conjure and bind, but we have to call each other something or else the entire supernatural world would be reduced to "hey, you" and "that guy over there." "Caitlleanabruaudi," she said, or something similar to it, but my mind suddenly felt fuzzy and some of the syllables sounded like they could only be pronounced by a mouth with two tongues."