Upon the plains of Dor Amarth, you have found two Elves, Dernaith and Megoril, who have come to Mordor in search of their long-lost companion.
'Did you not hear? I said speak! Why have you come here?'
You introduce yourself to Megoril and tell her of your journeys with the Host of the West and of your efforts to ensure the success of the Ring-bearer's quest and the downfall of Sauron the Enemy. You also tell Megoril of the Dwarves of Mordor and of their efforts to find the lost dwarf-rings in Sauron's hoards.
'Very well, ${PLAYER}. I am Megoril of Lindon, and my companion is Dernaith. We are among the last remnants of the great Alliance in this realm, and it brought us joy and relief to learn that Sauron had truly fallen. Death has always eluded the Dark Lord, but I have heard that his Ring is gone and his essence diminished to naught. I know not why any would seek the dwarf-rings or any other artifact that was wrought through Sauron's corruption, for now the evils he has done to the peoples of Middle-earth might now begin to heal at last....
'I never thought I would look upon the plains of Gorgoroth again, but fate has brought me hither once more. You see, Dernaith and I have returned to this land in search of our lost friend and kin, Thelaron.
'During what is now called The War of the Last Alliance, our friend was taken by the Enemy and borne into Mordor on the back of one of his winged fell beasts. Our efforts to rescue Thelaron before he was taken beyond the Morannon failed, and in so doing, we nearly lost another of Gil-galad's favoured warriors to the corruption of Morgul-steel.
'Even after Sauron fell at the end of the Second Age, we could not find Thelaron in Mordor. He was hidden somewhere beyond our sight, and the Enemy's forces still remained to harry us - as few as they were after the War. Thus, our search begins anew. If Thelaron lives still, we shall find him!
'Dernaith has been attempting to learn what the spirits residing in these watching-stones have seen that they might unwittingly aid us, but none have answered our challenges... other than this one. Dernaith beheld a terrible form rise from this statue of Sauron, and it spoke to him, warning he would share the fates of the damned in the Mordath.
'I have never known such a place in Mordor, but in the language of the Elves, it means Black Pit. Indeed, this has given us much to consider....
'Perhaps Dernaith might know the fates of the dwarf-rings you spoke of....'
Dernaith can be found at the foot of the statue of Sauron near the Oath-taker's Horn in Dor Amarth.
Megoril has asked you to speak to Dernaith about the fates of the dwarf-rings and their bearers.
Gimli can be found outside the Oath-taker's Horn in Dor Amarth.
Dernaith has told you of a confrontation he had with an echo of the Dark Lord, a glamour, bound to the statue of Sauron. The glamour spoke cryptically, but told of the damned in the Mordath - the Black Pits of Mordor. You should return to Gimli and see if he has come to a decision about what is to be done about the Firehorns and King Váskmun Greytooth.