The eternal goddess slowly raised her left hand. It was like a giant guillotine blade being
set above the victim using a pulley and rope.

“Vast waters that symbolize the Nile, wash away this silly person’s malice.”

This was far more than the artificial rain coming from the sprinklers. It had to be taken
from the air and from the boards of the stage. If not for his reflection, it probably would
have been taken from Accelerator’s body as well. Every speck of moisture in that space
was extracted and gathered together to form a giant blade extending above Nephthys’s
raised left hand.

The extremely dry air felt like the harsh desert.

No tricky martial arts were needed here.

If she just let gravity take over as she swung this attack down, it would eliminate any
external threat. Nephthys was the wife of the murderer Set, but she was also the one who
had cried upon learning of Osiris’s death. Nephthys’s tears would even wash away the
world’s sins. So if you wanted to confront her head on, you had to bring an impurity great
enough to slay a god. ...If such a thing existed in the surface of the Four Worlds, that is.

-Shinyaku Toaru Majutsu no Index Volume 22 Chapter 4 Part 11