As a result, Sigma drew his gun and immediately fired a bullet into Jester.
It was a considerable distance, but Sigma’s reinforced senses and body were turned into a single emplacement and his shot hit its mark in the center of Jester’s forehead.
It would naturally take more than that to kill him, but the bullet, treated with magecraft, inflicted damage that no ordinary weapon could.
“You just had to butt in,” Jester tutted. “You, a mere human.”
Jester instantly regenerated his injury and shot a glare at Sigma.

Fate/Strange Fake: Volume 5, Interlude ("Mercenary, Assassin, Vampire II")