She was about to ask what he meant when more of the wall of the building collapsed.
“!”
The pair turned to see a row of three massive, bestial mouths.
Kerberos had grown again while they were not looking. Its appearance recalled a three-headed beast out of a giant monster movie.
Poisonous plants sprouted wherever droplets of its drool hit the floor.

Fate/Strange Fake: Volume 6, Chapter 20 ("Dream Becomes Reality")