Looking at the end of TTT, just before Cnaiur kills Moenghus.
"Nayu … You have returned to me ...."
...
“Just as I knew you would.”
This is Moenghus speaking. Sounds a lot like The Prophesy. Nayu sounds a lot like Celmomas' son's name.
Suddenly Cnaiür could feel it: the miles of earth heaped above them, the clawing inversion of ground. He had come too far. He had crawled too deep.
Italics from text.
Wonder why the italics. Again the emphasis on ground, and warning those that would dig too deep...
His eyes leaden with ardour, he murmured, “I wander trackless ground.” Moënghus gasped, jerked, and spasmed as Cnaiür rolled the Chorae across his cheek. White light flared from his gouged sockets. For an instant, Cnaiür thought, it seemed the God watched him through a man’s skull.
What do you see?
But then his lover fell away, burning as he must, such was the force of what had possessed them.
Italics from text.
Its basically quoting the No-God...
One last thought too many … See! See! He cackled with grief.
The anguished cries of a crazy man pushed too far, or the beginning stages of the No-God being born again?
Crackpot: The Consult have been grooming Cnaiur to become the next No-God, this was just one more cog in the wheel.