This is where Arthas begin to walk the road of the dark side. He is eager to punish the Scourge (the undead), for they have invaded his lands. First in his vengeance is the Dreadlord Mal'Ganis. In mission 8, they will have a little competition. With all the cool items gathered in previous missions Arthas should easily slay Mal'Ganis a few times and gain advantage.