One will be led by Wulfrik the Wanderer and the other Throgg (who is a rather large troll). In all intents and purposes, The Creative Assembly are using Norsca as a two factions for the player to play. Norsca is a collective term used to describe the barbarian human factions that reside in the northern part of the Old World. You've probably already received a free Norsca code already or alternatively, you'll have to buy it as DLC - it sucks, but what can you do? If you have pre-ordered the second installment of Total War: Warhammer
That's right, finally we will be able to play as Norsca and it's coming really soon - August the 10th in fact. In the barren north monstrous armies under Wulfrik and Throgg's command are manifesting, and will soon march towards the heart of the Old World.