White Magic leader Mira Billotte possesses an unforgettable voice—a pastoral siren's husky tone pitched somewhere between those of Karen Dalton and Nico. She also plays piano and guitar, creating a slowly rollicking brand of mystical folk that'll send trepidatious chills down your spine. Her songs possess beautiful melodic contours, but they're skewed and imbued with a sweet dread. She and her band lure you into a dangerously seductive aural web. (Chop Suey, 1325 E Madison St, 324-8000. 8 pm, $8 adv/$10 DOS, 21+.)