Without Sanction

Aviden's father was one of the poorest of House Uthorin's vassals. As a result, Aviden has ever been mocked by those of greater status and skill. It was expected that he would be little more than fodder when he joined the ranks of Uthorin's armies. Despite such expectations, he continues to survive the perils of war. He is driven by a grudge against anyone with greater power or skill than he; namely, everyone else. I know little of the details, but for some time he has been plotting a means by which to gain the favor of the Witch King. He talks of becoming a lord over those who tormented him, and it is then he will take his revenge. By the sounds of it, Aviden has decided the time is ripe to put his feeble plan into motion. I cannot say where he is. If he has taken command of General Morthek's troops, then perhaps one of them might point the way.

When you spoke with him, Cordelon Deritar mentioned that his men were to meet with Maradath Sorrowblade at the House of Steelwind prior to their ambush. Perhaps Sorrowblade will be more useful than Noreth in locating Aviden. Find Sorrowblade, and speak to him to learn of Aviden's whereabouts.