The Ristaag is completed, but Wind-Eye has been getting reports from his sentries of ominous signs. He tells me that the shores are filled with dead horkers, and he knows of no reason why this would happen.
The Castle Karstaag
Wind-Eye has told me more about the Bloodmoon Prophecy, an ancient Skall legend that tells of the signs that appear before a demon god begins to stalk the land. He fears now that these signs have begun to appear, but he would like me to investigate further.
At the northwest end of the island stands an enormous castle of ice, home of the frost giant Karstaag. Wind-Eye tells me that he and the Skaal have lived in peace, but that this slaughter of the horkers could be the work of the Rieklings under his control. I should investigate Castle Karstaag and see what I can find out. Though I cannot go in the front door, there is an entrance under the water north of the castle that has recently been discovered.
I have entered the Caverns of Karstaag, a network of caves that run below the castle.
Inside the caverns I was greeted by a Riekling named Krish. He tells me that he knows nothing of the dead horkers, but he may know how I can find out more information.
The master of the castle, Karstaag has been missing for days. While he has been gone, Krish and his band have attempted to wrest control of the castle from Dulk, another Riekling loyal to the giant Karstaag.
Krish had entered into a pact with a band of grahl to help him secure the castle. The grahl however, have turned on the Riekling, slaughtered his troops, and now block the entrance to the castle above.
The magic surrounding the castle allows none to enter without Karstaag's blessing. Krish will allow me to enter with him, if I am willing to help him fight his way past these trolls. Once inside, I will be able to question Dulk about the dead horkers.
The ice-trolls are defeated. I should now be able to enter the castle with Krish.
None may enter the castle itself without the giant Karstaag's blessing. However, since I killed the trolls, Krish will accompany me to the door and upstairs. There I can speak with Dulk.
Krish has been killed.
Dulk knows nothing about the dead horkers. He tells me that his master Karstaag disappeared days ago, after werewolves appeared at his door. The rest of the giant's minions have been involved in the rebellion at the castle, and could not have caused the deaths of the horkers. I should report these findings to Wind-Eye.
I've reported my findings to Wind-Eye, who did not seem surprised that the slaughter wasn't performed by the Rieklings. He fears that there are terrible times ahead for Solstheim, and gave me sword that casts magical fire as a means to protect myself against the coming storm.