I have read a lot of lore but one thing has been confused. With the death of Malygos the Nexus war is over and an aspect is dead. What does this mean in terms of lore? Does this affect spell casters or more specifically mages? At the same time assuming we will kill Deathwing what will this mean in terms of lore? Also what would the death of Ysera, Nozdormu, and even Alexstrasza mean?
The significance of Arthas' death means the scourge is no longer attempting to further their plague, they are just holding on to the ground they have no nothing more (thanks to Bolvar).