immune to lava

It came from in front of her.
It came from the passageway that had been turned to lava.
She was sure she had heard the voice come from that direction.
Due to the enveloping steam, she couldn’t make out the details of the figure.

But from the silhouette she could see, she could tell the figure was standing in a
completely normal and natural way.
Even though he was standing in lava that must have been a few thousand degrees.
Even the enveloping steam was more than a hundred degrees and he was in the middle
of it all.
“Someone needs to tell those assholes there’s such a thing as too much force. Using a
blade for severing continents on a flesh-and-blood human is just wrong. I mean, how am
I supposed to confirm the remains? Well, since the riots stopped after the blast, I guess
the objective was carried out.”
The figure did not seem to care about her.
He didn’t even look her way.
His words weren’t directed towards her either. He must have been using a radio or a cell
phone to talk with someone far away.
(That’s fine,) Itsuwa thought.
She could tell an odd sweat was coming from her hands as they held the spear.
She didn’t know how she could tell, but that figure standing in the middle of the lava
was on a different level. He was past the level where you thought about how to take him
on or that you might win if a miracle occurred. She felt that facing him would be like
swinging her slender spear towards a gigantic piece of iron.

- Toaru Majutsu no Index Volume 14, Epilogue