William Powhida and his alter ego, also known as William Powhida, are artists and professional shit-talkers who make drawings of drawings and lists of enemies. In June, they declared war on Miranda July in the pages of The Stranger ("she must be stopped or she will kill me with her feelings"), and now they're coming from Brooklyn to perform parts of a book about a character named James J. Wreck. (Platform Gallery, 114 Third Ave S, 323-2808. 3 pm, free.)