Later, you should be able to get a unique Ancestor Hero (Hans Valhirsson) and a Yoked Carnosaur Regiment of Renown once you’ve crafted the relevant Artifacts.
Likewise, a Runesmith hero is accompanying your forces.
His army has 1x Ironbreakers, 1x Longbeards (Great Weapons), 2x Dwarf Warriors, 2x Quarellers, 1x Grudge Throwers. He already owns the Thrice-Cursed Peak settlement and he’s at war with Clan Mange of the Skaven. Thorek starts in the Southern Spine of Sotek province. Lastly, winning The Lost Vault final battle isn’t a requirement here. However, he also has to destroy certain factions and reclaim several Dwarf Holds while ensuring that most misdeeds in the Great Book of Grudges have been settled. Note: In Mortal Empires, Thorek still has to reforge at least five Artifacts. Instead, these are his victory conditions: Thorek Ironbrow does not necessarily participate in the race for the Vortex. +5 hero recruit rank and -25% upkeep for Runesmiths. +15% reload time reduction for Bolt Throwers, Grudge Throwers, and Quarellers. Let’s talk about Thorek Ironbrow’s campaign mechanics in Total War: Warhammer II. Total War: Warhammer II – Thorek Ironbrow campaign overview and basics