Toaru Majutsu no Index

In Academy City, magic and science coexist in an unwavering power struggle. Toma Kamijo, an academically-challenged student in Academy City, wields the power of the Imagine Breaker in his right hand, which allows him to completely negate all supernatural powers as well as his own luck. When he happens upon a mysterious nun named Index, whose mind has been implanted with the Index Librorum Prohibitorum 103,000 ancient texts banned by the Church Toma's luck is about to be pushed to its limits when he finds himself in the middle of a war he never expected!