Board Thread:General Discussion/@comment-25597018-20130201002445/@comment-24901571-20130220033806

Well, when you find that Ebony warrior, be sure to have a legendary Dragon tag along with you. Or you can complete the unmarked quest involving Karstaag, so you can unlock the spell to summon Karstaag. He stands on equal ground with the Ebony warrior in terms of strength, health and damage dealt. When it comes time to do battle with the Warrior, you can just summon Karstaag and watch the two of them have at it :)