Mashing up references from the Russian folktale The White Duck, German author Johann Karl August Musäus’ The Stolen Veil, and the life of Bavarian King Ludwig II, Tchaikovsky’s 19th-century ballet Swan Lake is mysterious, iconic and notoriously complicated. Initially dissed by critics and now cemented as a production that challenges and defines ballet companies, the tale of transformation and ill-fated passion lands at the Tobin on the wings of Ballet San Antonio. Given its recent staffing shakeup, BSA’s take on Swan Lake (set to a live score performed by the San Antonio Symphony) promises a note-worthy season opener.