The author uses the word "The ROOD" in English to refer to the artifact in the original light novel. Today it refers to the cross or crucifix that are at the entrance to the choir or chancel of a church. However, Rood was originally the only Old English word for the instrument of Jesus Christ's death.
Toaru Majutsu no Index
- Main article: Index Arc
Index cites to Kamijou Touma the Rood, among other things such as the Spear of Longinus and Joseph's Holy Grail as the limits on how magicians are capable creating substitutes for ceremonies using modern materials.
Shinyaku Toaru Majutsu no Index
- Main article: Coronzon Arc
During his final battle with Aleister Crowley, in response to his opponent using the pentagrammaton linked to the Son of God to build his body up to a higher level, the reproduced Mathers used a method based around INRI, the holy letters carved into the original cross, to purify and enhance his body in a similar fashion.
- Shinyaku Toaru Majutsu no Index Light Novel Volume 21 Chapter 4 Part 1
- Toaru Majutsu no Index Light Novel Volume 01 Chapter 2 Part 2