Messes with sense of distance

“Disguised gun, to my hands. Load out: magic bullets. Quantity: One is more than
enough.”
He waved his right hand. In reply, a rapier with a flintlock gun hidden inside
materialized out of thin air. Satisfied with his own perfect technique, he continued to
give orders.
“Usage: crushing. In accordance with the original objective of a single bullet, fire and
crush my prey’s skull.”
Aureolus pulled the trigger. The gunpowder propelled the magic bullet out, aiming for
the still-laughing boy’s eyes.
Though it was a low-velocity projectile, it would still pierce the brain if it hit the eyeball.
No human could dodge that speed, nor could one block that force.
The boy wouldn’t be able to do anything. The inside of his head would simply splatter
like a tomato.
That’s what should have happened.
“What...?”

Aureolus couldn’t believe his eyes. The boy didn’t do anything. He thought he had fired
the blue magic bullet accurately, but somehow, somewhere, it went wrong, passed by the
boy’s face, and struck the wall behind him.
(Did I miscalculate the distance? No...)
He declared the order once again.
“Copy previous action. Usage: blind fire. Ten disguised guns firing at once.”
Aureolus pulled ten of the camouflaged guns out of nothing, and bullets flew from their
barrels that looked like a bouquet of flowers.
However...
Of the ten bullets that should have hit him precisely, not one of them could even deliver
a glancing blow to the boy.
(A misfire!? Impossible...!)
Aureolus watched in disbelief—watched the boy who had twice avoided certain death.

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

“It’s true that your act fooled Aureolus completely. But there was no way your bluff
would sink in right away, right? Twice, after your arm was cut off and you started your
comedy routine. Wasn’t it because you effortlessly avoided his attacks that he started to
believe in you?”
“...Umm.”
Kamijou stared blankly at Stiyl like a fool.
“You still don’t understand? Let me spell it out for you. Aureolus’s first two attacks
didn’t fail because your bluff was working. I simply used magic to screw with Aureolus’s
sense of distance.”
“What...!?”
Kamijou was startled.
“Is it that surprising? My specialty is fire. It’s really not difficult to make a heat mirage,
change where the light gets refracted, and blur his vision,” he explained like it was a
trifling matter.
“No, not that! I’m not surprised about that! You were a flesh planetarium at the time,
floating in the air! You were still able to use magic like that!?”
“Flesh planetarium, eh? Quite a merry way of putting it...But there’s no real problem, is
there? I was still alive at the time, so there’s no reason I couldn’t temper my life force to
refine it into magic power. Fortunately for me, the rune cards I had hidden scattered
everywhere when my body exploded, too.”

- Toaru Majutsu no Index Volume 2, Epilogue