Spoilers: Tlanxla, the horde, and two dated maps. No campaign ending.

The city the Catastrophe took
The Hunter and the Beast store page calls Nakai a revered Kroxigor of the first spawning. His home city, Tlanxla, was destroyed in the Great Catastrophe. He has wandered since, in service of the Great Plan. The pack is required for the Spirit of the Jungle in Immortal Empires. Warhammer II does not unlock him.
The 29 August 2019 FAQ names the opposing lord: Markus Wulfhart, the Empire huntsman. In the Vortex campaign that opposition is a hunt for warmblood invaders, with four Hunters in the FAQ's framing. That hunt is the Vortex telling. It is not restated here as the Immortal Empires objective. Wulfhart's own lore is the Empire page for the hunter.
A horde, and a vassal that holds the ground
The FAQ gives him a horde. The Encampment stance is how the army develops the infrastructure it carries, and a lost horde takes that investment with it. The Defenders of the Great Plan are the vassal faction that receives captured territory. Temple dedications and the favour of the Old Ones sit beside the march. The store's monsters around him include Sacred Kroxigors and Dread Saurians. They are part of that pack's roster, not a second horde.
In battle he is a melee brawler. The lord page wants the Kroxigors and the Saurus in the same fight, with room around the larger bodies, and a reserve watching the rear. Rites of Rebirth and Mastery are the FAQ's ritual names. They are campaign choices. They are not a numeric recipe, and they are not a substitute for a recruiting base you can no longer reach because the horde has moved on.
Tower of Ashung, and the wander that is not a start
The 28 June 2022 prologue lists Nakai at the Tower of Ashung. The store's wander, after Tlanxla fell, is the biography. The Vortex warmblood hunt is the 2019 campaign mode. Three articles, three settings: the lost city, the Vortex hunt, and the prologue's tower.
Oxyotl, two years later, is the other Lizardmen lord whose movement is the point of the faction, and his tool is the Silent Sanctum rather than a horde and a vassal. Gor-Rok stays at Itza. Nakai's page stays with the first spawning, the lost city, the vassal, and Wulfhart. A temple the vassal dedicates is the campaign's religion, not Tlanxla restored by the store text.
Nakai the Wanderer: gameplay and availability · More character stories
Sources
- The Hunter and the Beast — totalwar.com
- The Hunter and the Beast FAQ — totalwar.com
- Immortal Empires starting positions: a prologue — totalwar.com
- SEGA: Immortal Empires DLC Ownership Guide — support.sega.com
- The Hunter & The Beast — official pack description — store.steampowered.com
- Creative Assembly: Lizardmen changes in patch 6.3 — community.creative-assembly.com