black wings power

The black wings on Accelerator’s back spread out explosively. They stretched to greater
than one hundred meters all at once and he swung them down towards that Level 0
boy’s head as grand weapons.
With a great noise, that strike that held the power to split a skyscraper in half vertically
came down.
And yet the targeted boy was not turned to a pile of meat.
It was due to his right hand.
He raised that arm above his head scattering the pitch black darkness.

- Toaru Majutsu no Index Volume 20, Chapter 4 Part 2