The next instant . . . a portion of the mud that had overflowed from his wound abruptly grew into a dark-red surge that launched itself at Hippolyte.
“In which case, demigod queen . . .”
“What . . .?!”
“Know that you cannot pierce the end of man with mere divine power.”
The “mud” the color of half-rotten blood and distinct from the “black mist” leapt to engulf Hippolyte like a mass of living slime.
She and her horse avoided it just in the nick of time.
But the “mud,” which seemed to have a will of its own, pursued Hippolyte, forming into an immense pair of viscous jaws to consume her in a single gulp.
“It will take more than that . . .!”
Hippolyte once again focused magical energy into the belt wrapped around her arm, preparing to draw it more divine energy . . . but as if in response, the mud suddenly burst apart.
“!”
It spread out like a spiderweb centered on a Main Street intersection, becoming a cloud of muddy fumes that threatened to envelope Hippolyte and her mount from all sides.

Fate/Strange Fake: Volume 6, Chapter 16 ("The Canon of the Demigods II")