Before long, Kerberos wriggled its three heads. No sooner had its heads exchanged looks . . . than its massive bulk reared back and its three heads pointed skyward and let out a resounding howl.
“Grrrrrrooooooooooaaaaaa . . .”
The trio of howls conveyed as much heat as if it were breathing fire.
Ayaka could not help flinching. Strangely, however, she felt no urge to run.
She may have instinctively sensed that the safest place in the ward-world . . . was that intersection where the most “fighting strength” was gathered.
But she still could not shake her unease.
In fact, the scene that unfolded before her eyes an instant later threatened to overwhelm her with pure terror.
The howls rang out and the space around them shook.
Then, as if in time with those vibrations, “shadows” began to rise throughout the city.
Sunless back alleys, beneath parked cars, the underground spaces that spread below manholes.
Something like a black mist rose from everywhere and began to solidify into countless clumps around the intersection.
Soon, they collected in a few places. In each of those places, shockingly, they manifested as beings identical to the Kerberos that was already dominating the area.
“What the . . .”
John broke into a cold sweat as he surveyed his surroundings.
Where a moment before there had been a single massive, three-headed beast, now there were countless more. They towered on top of buildings and over streets, completely surrounding the officers, Richard, and Ayaka.
The city that had been quiet a few minutes before was suddenly shrouded in the presence of death.
The pack of giant beasts did not rampage. They just silently watched with eyes full of deep darkness.

Fate/Strange Fake: Volume 6, Interlude ("As Dream and Reality are Both Illusion II")