Palantir of Fortune: Lost Tales/HoME

[Guinevere]

OK, I think I can now figure out the rest:

...and why do the sons of the Noldoli cry out in the low places for fear of the children of Melko the accursed? Arise, o Thornhoth, whose beaks are of steel and whose talons swords!

You didn't answer my question about the plural, but only then "beaks" makes sense, and I can't see any other word there that would fit.
But I still don't know who says this and in what situation ...