Do you believe in magic? If you had visited Japanese-born Yasue Maetake’s first solo show in Miami, you might have begun to. For “Sculpture Without a Skin,” the New York–based artist used parts of dead animals to make spindly sculptures that are so dainty (and deadly), they seemed like tools fashioned for evil-intentioned fairies. Leaning against a wall was Manufactured Decay in the Spear (all works 2009), a long, medieval-looking lance made from ivory-hued bones and wickedly glinting steel. The disturbingly beautiful Warped Floor and Object seems to present tools for a ritual sacrifice—is that