Fte strike at range

Kamijou reflexively looked over in the direction of the exploding flames.
And in that instant, Kanzaki Kaori’s slicing attack came at him.
A distance of ten meters lay between Kamijou and Kanzaki. Also, Kanzaki’s katana was
over two meters long, so it looked impossible for her slender feminine arms to pull it
from its scabbard, much less swing it around.
...But that was just how it looked.
In the next instant, the air above Kamijou’s head was sliced apart like she was wielding a
giant laser. Kamijou froze in place in shock and the blade of a wind turbine behind him
and to the right was silently sliced through diagonally as if it was made of butter.
“Please stop this,” said a voice 10 meters in front of him. “Ignoring my warnings will
only lead to death.”
Kanzaki’s two meter+ sword was already in the scabbard. The strike had been so quick
Kamijou had never even seen the blade exposed to the air.

- Toaru Majutsu no Index Volume 1, Chapter 2 Part 3