origami bullet

Kamijou suddenly heard a male voice he knew well coming from outside his range of
vision.
Before he got a chance to look over, a red bullet shot through the air. It was a burning
orange piece of origami. The folded square scrap of paper flew towards Terra’s face with
enough force to crack concrete.
Terra merely followed it with his eyes.
“Precedence: Magic – Lower, Human Skin – Higher.”
It struck. But just as the origami touched Terra’s skin, it suddenly changed directions
and struck the wall right next to Itsuwa. It was like a bullet ricocheting off of a metal
wall.
Kamijou finally turned to look at the intruder.
A boy wearing blue sunglasses was standing there.
Because he had forced himself to use magic, he had a trail of blood coming from his lips.

- Toaru Majutsu no Index Volume 14, Chapter 3 Part 8