A moment later, Niang-Niang spread her arms and all ten fingers transformed into independent swords, spears, axes, staffs, etc. They all shook like musical instruments and sent out a high-pitched din.
[…]
Starting in District 7, a hopelessly powerful shockwave swept across Academy City.
[…]
It seemed to be at a school.
Based on the size of the campus and the number of school buildings, it may have been a combined middle and high school.
But the metal fence had toppled, the trees had fallen, and the recently restored glass had shattered.
People were collapsed all over the schoolyard, but were they really students? Several dozen girls of middle and high school age were passed out there.
And on top if it all, she saw three other people.
One was a raincoat girl who had been torn to pieces.
One was a spiky-haired boy holding that “wreckage” while lying bloody on the ground.

Toaru Majutsu no Index New Testament vol.15 ch.4 pt.5-7