The Wind of Change

Of all those we consider to be allies, the Dark Elves are the most devious. There will come a time when they will attempt to overthrow us, and we must maintain a close watch upon them to ensure their betrayal does not come as a surprise. Malekith's forces continue to flood into Ulthuan like a wave of darkness, and the High Elves are helpless to resist their onslaught. As we continue to motivate Change in other parts of the world, we must travel to Ulthuan and ensure that our goal is realized within Finubar's torpid homeland. Travel to Ellyrion, a land of horses and sad monuments to heroes long dead. Find the Wellspring of Caledon, southwest of Brokenblade, and taint the waters within it. While you are within the Dark Elf encampment, pass this parcel to Kliener Voss, one of our Magi. If you succeed in this task, return not to me, but to Queen Morathi. My advice to you: do not fail.

Travel to Brokenblade, a Dark Elf encampment in Ellyrion. Speak to Kliener Voss, thus giving him the Writhing Parcel. Next, travel southwest of Brokenblade to the Wellspring of Caledon. Use the Mephitic Dust in your inventory near the Wellspring to contaminate it. Return to Queen Morathi in the Inevitable City when you are done.