Haruri, meanwhile, was distracted by the onslaught. No sooner had she looked away than a bullet fired from Bazdilot’s pistol, aimed squarely at the girl mage’s heart. That bullet, however, never reached Haruri. Bazdilot’s ammunition was crafted to pierce advanced defensive magecraft, but it ricocheted off an invisible wall.
A moment later, “it” materialized in the center of the workshop.
Something like static crackled through the space between Bazdilot and Haruri. A giant mass of rust-colored iron appeared, forming a wall between the two.

Fate/Strange Fake: Volume 4, Chapter 12 ("Day 2, Morning")