There is something I've never quite understood from the Lich King's nature and purpose and it's the famous qoute that "there must always be a Lich King", because the Scourge must be controlled or they will ravage the world if unleashed.
But my question is, why? Why must the Scourge be contained/controlled? Why keep such terrible threat to the world remain? It makes no sense to me, if the argument is that the undead will consume the living if left unchecked, why does the new Lich King not destroy them himself? Does the Helm of Domination not have that power? Can't the Lich King just re-absorb the power that sustains every undead or something like that?
I suppose that it no longer matters now, after the shattering of the Helm, but for argument's sake lets discuss!