In 170 AG, Councilman Tarrlok orchestrated a raid on an underground Equalist chi blocking training facility located in the Dragon Flats borough. According to his sources, there was a cellar underneath one of the borough's bookstores, where Equalists taught chi blocking to nonbenders in secrecy. Tarrlok stormed the underground cellar with a task force consisting of waterbenders, earthbenders, and Avatar Korra, and they successfully defeated and arrested the assembled criminals.