Mithrandir has studied the artifact that Ayorzén stole from the vault of Durthang and believes that if it might be cleansed of its corruption it could be empowered with a force for Good.
'I have studied the artifact that Ayorzén stole from the vault of Durthang. It bears a powerful corruption, but it was not made in the land of Mordor. It came from elsewhere, and the corruption that envelops it stems from its long stay in the Black Land. If this evil could be cleansed, I believe that Elrond could imbue it with a powerful and vital force for Good.
'Before that can happen, however, we must do something about the corruption that Mordor has worked upon it. There are different methods to accomplish this, though the Wise disagree upon the effectiveness of each. My preferred means for such a cure is to bring the corrupted item to the place where it was made, or to places of some significance upon its path, and to thereby diffuse the foul touch of Mordor that has, in the interim, claimed it. We must learn the story of this heirloom before it came to Mordor.'
The Wizard turns the artifact over in his hands, studying it for some clue to its origin. To your eye the heirloom is a small shard of bone or tusk, splintered smoothly from a larger piece, and you say so.
'I deem that you are right, ${PLAYER}, but I will narrow the scope of your deduction. This was once part of a porcine tusk, from a boar or similar animal. These have been known to chip or splinter during combat.
'That would not ordinarily be a cause for interest, but there are markings carved near the base of it, faded and hard to read. Perhaps an expert jeweller in Minas Tirith can use his tools to read them for you.'
An expert jeweller in Minas Tirith may be able to use his tools to read the markings on the corrupted shard for you. Such a jeweller plies his trade on the southern side of the Fourth Circle, after the battle.
One jeweller sent you to another. Perhaps the expert jeweller in Snowbourn, the city of Rohan in the Sutcrofts, will be able to read the markings on the corrupted tusk-shard.
The jeweller in Snowbourn sent you to the village of Aldburg, in the Eastfold, to ask a Bard of Rohan about the tusk-shard.
Eldmath has gone ahead into the field, inspired by the promise of adventure and planned to meet you north-east of Aldburg.
You should defeat the Wargs drawn by the corruption of the tusk-shard, or they might prove a danger to Eldmath or the people of the Eastfold.
Eldmath ran off during the fighting, and you should find him. He cannot have gone far.
Eldmath has been captured by a raiding party of Orcs.
Elrond is at the Haven of Orladion in Rivendell, north-west of the Last Homely House.
You have cleansed the corruption from the Vengeance of Folca and should bring it now to Elrond in Rivendell.