Robots and performers make beautiful music together. The opera "Death and the Powers" features a chorus of seven-foot tall, autonomous, polymorphic Operarobots and three large fifteen-foot tall robotic walls. At various times, these function as characters, set pieces, and lighting elements. Using state-of-the-art control electronics, and a novel real-time performance control system, a total of 9 individually addressable Operabots reflect on, participate in, and illuminate the action onstage.