Supernatural (2005)

S12E10 Lily Sunder Has Some Regrets

In "Lily Sunder Has Some Regrets," Lily Sunder immerses herself in dark magic, perfecting her abilities for more than a hundred years with the intent of avenging her family's murder by a group of angels. As her quest for vengeance intensifies, Sam and Dean race against time to prevent Castiel from falling into her deadly trap.