Rakarth
Total War: Warhammer II DLCfreeSteam store page ↗
What needs this DLC in Warhammer III patch 9.0, by the game's ownership tables. Some content can be unlocked by more than one DLC; it is listed under the one every unlocking set shares, else the earliest.
Lords and heroes (1)
Legendary lord.
Units (5)
Factions (1)
Source: ownership_products (Rakarth), ownership_content_pack_requirements, …_required_products and the unit, agent-subtype and faction ownership junctions, patch 9.0.