Sludgified Bay Area heshers Black Cobra bring their entirely plausible doomscape to Sister (407 Central NW) late on Friday, Aug. 29. A duo consisting of drummer Rafa Martinez and guitarist/vocalist Jason Landrian, Black Cobra has been blasting ravenous riffage since the early aughts. This summer they're turning out tunes from their deadly releases on Southern Lord Records, including blindingly bright Invernal and storm-seeking ode to electricity Chronomega. Visceral and rotten to the molten core—of a previously unknown planet of dark shadows and screaming recrimination—Black Cobra entrances with its burning eyes before falling fangs first on your throbbing skull. Opening are Ohio metal maniacs Lo-Pan, whose new recording Colossus is an attempt to conquer the world with aural alchemy available only to the Elder Gods and their winsome, doomed followers. Car Thief and The Please Help open one of the more deadly metal encounters this city has seen this year. It’s $5 to get into this headbangers' ball. This 21-plus war against somnolence commences at 9pm.