The DRAGON Arc is a major story arc of the Toaru Majutsu no Index series. The arc occurs in parallel to the events in the English Civil War Arc, focusing on the happenings in Academy City's dark side. It continues on from the aftermath of the Battle Royale Arc, as Accelerator and GROUP try to track down the mysterious organization known as DRAGON, while Hamazura Shiage finds himself dodging assassins, ultimately finding himself in another confrontation with Mugino Shizuri.