The Devilsaurs trapped in the mire got the full experience of the Devilsaur's miserable plight.
They were like flies stuck to flypaper.
Breaking free on their own was impossible!
They could only obediently await death.
As for Herad showing them mercy and letting them go?
The probability of that was zero.
Devilsaur hide was quite good too. How could he possibly let them go?
Herad teleported Xal'atath back from the Storm Peaks, where Xal'atath had been roaming around studying the Old God Yogg-Saron's weaknesses, to deal with the Devilsaur.
The Devilsaur had tremendous vitality.
Absorbing its vitality could help Xal'atath's true form grow.
Xal'atath's true form had grown from a small Strange-Shaped Dagger into a suitably sized Full Moon Scimitar entirely through the vitality of these powerful monsters.
Emerging from the Portal, Xal'atath approached the Devilsaur with great enthusiasm.
In Xal'atath's eyes, its abundant vitality was a treasure.
Even the combined wealth of resources in Un'Goro Crater had nurtured only a few such treasures.
Xal'atath flew behind the Devilsaur, and the Full Moon Scimitar slashed precisely into the spot over its spine.
The Devilsaur's hide was tough.
But however tough its hide was, it could not compare to a powerful demigod.
And Xal'atath had slain demigods before.
The Full Moon Scimitar cut through a creature that barely touched the threshold of a demigod with utter ease!
The blade pierced the thick hide and muscle, stopping only when it reached the spine.
The Full Moon Scimitar was not long enough to sever the Devilsaur's spine outright.
Nevertheless, that slash from Xal'atath dealt the Devilsaur a grievous blow, both physically and mentally.
The Devilsaur was the overlord of Un'Goro Crater.
It had scarcely suffered any injuries throughout its life.
With its enormous bulk and impenetrable hide, it could completely ignore ordinary attacks.