Coronzon Arc

The Coronzon Arc is a story arc in Shinyaku Toaru Majutsu no Index, covered in Shinyaku Toaru Majutsu no Index Volume 20 and Volume 21.

With Coronzon temporarily sealed in the evacuated Academy City, Kamijou Touma, Accelerator, Hamazura Shiage and a number of their allies accompany Aleister Crowley to the United Kingdom, currently under attack, in order to find the Great Demon's achilles heel before she breaks free once more. However, the demon's machinations have left many adversaries, obstacles and traps in their path.