“Will you ever stop mocking me? This is an accurate copy of the Shroud of Turin, the cloth worn by the saint that was stabbed by the Lance of Longinus,[a 20] so its strength is pope-class. I guess you would say it’s something like a nuclear shelter. It turns aside or absorbs any attack, be it physical or magical"

Toaru Majutsu no Index vol.1 ch.1 pt.3