The very waters of Agamaur have risen up to protect Ivar and the Red-maid, animated by fell spirits of Morgoth from beyond the world.
'Though I fear it, I think that the spirit at our encampment in Agamaur speaks true. There are ancient and evil things in this land.
'Beyond these doors you will find fell spirits taking on the form of the water that drowns this land in eternal corruption. The spirit, Dannasen, told me that ridding these creatures from the land may aid in the restoration of the natural order.
'You will find the spirits throughout this area and even within the bounds of the fortress and arboretum, though I think that you might find them throughout the early ruins of Garth Agarwen as well.'
Darkwater can be found within the area of Garth Agarwen.
Hartrím asked that you assist him in appeasing the spirit at Agamaur, Dannasen, by destroying the fell spirits corrupting the lands within the area of Garth Agarwen.
Hartrím can be found at the entrance to the area of Agamaur called Garth Agarwen.
The darkwater have the power to strike fear even within the cursed shades of Arthedain, preventing them from advancing on Garth Agarwen and fulfilling their curse. At Hartrim's request, you went forth to destroy them and met with some success. You should return to Hartrím with the report of your victory.