As Alcides was shooting his venomous snake arrows from atop the chimney, his eyes caught the chain of light running through the sky.
“Not a god, but one of their relics...”
With the air being altered, the power of the series of arrows he fired decreased.
But he didn’t mind. With the vast volume of magical energy at his disposal, he could compensate for the lower damage with sheer quantity.
The image of the nine-headed serpents assaulting the temple one after the other resembled a black deluge.
And then Alcides’s next move made this description literal.
Glaring at the targets of the chain, the temple of Ishtar and the Bull of Heaven entangled with the giant serpents of his own creation, he said:
“Share Augeas’s fate, livestock.”
At the same time, he activated his Noble Phantasm, King’s Order.
The serpent copy created from his next arrow shot popped like a water balloon the instant it reached the forest.
And then it turned into a genuine black flood that began to swallow the forest.
One of the labors in Alcides’s life was the Augean Stables.
An order to clean in 1 day a giant barn with three thousand cows left unattended for decades.
A service that was more like harassment than a labor of penance.
The king who ordered it and then annulled his own agreement was ultimately killed for it, but that’s not the important part of this chapter.
The method he used to clean the stables whose owner never visited since its construction was honestly simple and truly out-of-the-box.
He changed the flow of the rivers near the stables by force, pulling their muddy streams directly into the stable grounds.
As a symbol of the tremendous strength it took to pull that off, he can use the power of his Noble Phantasm to replicate the muddy streams he stole, pouring the venomous snake’s miasma and the “mud”’s magical energy into it to form the black flood splashed onto the forest.

Fate/Strange Fake, Volume 8: Chapter 24 - Fifth afternoon; Be silent, ******