Christian Cagigal, a storytelling magician whose sly charm and soothing voice can be hypnotic in a quietly creepy way, prefers not to reveal the overarching narrative of “Obscura,” the intimate evening of theater and magic he performs Oct. 15 through Nov. 2 at the Aurora Theatre in Berkeley. “I do close-up magic with playing cards, tarot cards and old photographs while telling stories about death, war and the devil,” says Cagigal, on the horn from his Colma home. A San Francisco State theater alumnus and former member of the San Francisco Mime Troupe, Cagigal has been creating and producing his own shows for a decade, many at San Francisco’s Exit Theatre, where he has worked as an artist in residence since 2006. Cagigal’s interest in clairvoyance and matters of the spirit was stirred by his father, Julio, a Spanish immigrant who joined the U.S.