Thelema

Thelema is a system of philosophical law and magic, developed by Aleister Crowley.

Several important Thelemic aspects and concepts are featured in the story of Toaru Majutsu no Index, and are involved in Aleister Crowley's plan.

Uses of Thelema within the story

 * Aeons: Thelemic concept in which the history of humanity is divided into several different Aeons, named after Egyptian deities.
 * Aiwass refers to himself as a being from the Aeon of Horus during his encounter with Accelerator and refers to Accelerator's black wings as something from the Aeon of Osiris.
 * During his encounter with Fiamma of the Right, Aleister Crowley refers to how Fiamma used the wrong format in his plans, saying that if he'd based his plans in the Aeon of Horus rather Osiris he would have achieved a position similar to him.
 * Aiwass: An entity encountered by Aleister Crowley, from whom the Book of the Law originated.
 * Aiwass itself appears within the series, first appearing during the end of GROUP's confrontation with Shiokishi.
 * The Book of the Law: Also known as Liber AL vel Legis. The central sacred text of Thelema, written by Aleister Crowley and originating from Aiwass.
 * The Book of the Law is a coded grimoire, widely considered to be very dangerous by many on the Magic Side.