Element Arc

The Element Arc is a story arc in Shinyaku Toaru Majutsu no Index, covered in Shinyaku Toaru Majutsu no Index Light Novel Volume 16.

After the disappearance of Kamisato Kakeru, a strange heat wave has overtaken Academy City. Along with it a swarm of powerful monsters known as Elements have appeared. Kamijou Touma must find a way to defeat the Elements and stop the heat wave in order to return peace to the city.