Spoilers: The Chaos year, the Silent Sanctums, and two dated starts. No campaign ending.

A year, and seven thousand years
The Silence and the Fury roster article of 12 July 2021 calls Oxyotl He That Hunts Unseen. A year in the Chaos Realms, in that article's words, translated to seven thousand years in Lustria. He witnessed the origins of Chaos. He came back to the blowpipe, and then to the shadows. The pack released on 14 July 2021. The store calls him a revered Chameleon Skink. The Ghosts of Pahuax are his Immortal Empires faction, and the pack is required.
The same article introduces the Skink Oracle, Chameleon Stalkers, and the Coatl as roster additions around him. Those are pack units. The core harassment troop on the lord page is the Skink Skirmisher, and the lord page is explicit that a Skink Skirmisher is not a Chameleon. Saurus Warriors hold while the missile troops move. Oxyotl himself wants a clear shot and a way out of a pin.
Silent Sanctums and the visions
Visions of the Old Ones are the missions, and the 12 July article describes them as a teleport between Chaos hot zones. The 1 July 2021 FAQ names the Silent Sanctums: hidden places he develops, and a Silence that is never caught trespassing. He can make a home of any climate, in that FAQ's wording. The travel network links the capital, the mission, and the sanctums already rediscovered. A mission still needs an army that can fight the target, and a home that is not empty when he leaves.
Taurox the Brass Bull is the beastman lord in the same pack, The Silence and the Fury. The pairing is the DLC's. It is not a claim that every Oxyotl campaign begins at war with Taurox on the current map. Taurox's lore is the beastmen page. Oxyotl's enemy in the biography is the Chaos he watched begin.
Deadwood, then the Godless Crater
The 1 July 2021 FAQ opens him in the cold north of the Deadwood. That sentence is the FAQ's, and it belongs to the 2021 campaign framing. The 28 June 2022 prologue lists Oxyotl at The Godless Crater. The two articles name two places. They are kept as two dated rows. Neither is upgraded here into the settlement on a current save.
Nakai's movement is a horde and a vassal. Oxyotl's is the sanctum network and the visions. Tiktaq'to's is a rite that restores movement to Tlaqua's armies. Three Lizardmen lords travel, and they do not travel by the same rule. The Ghosts of Pahuax remain a hunt. A vision you accept is the campaign's choice of target.
Oxyotl: gameplay and availability · More character stories
Sources
- Oxyotl and the Ghosts of Pahuax — totalwar.com
- The Silence and the Fury FAQ — totalwar.com
- Immortal Empires starting positions: a prologue — totalwar.com
- SEGA: Immortal Empires DLC Ownership Guide — support.sega.com
- The Silence & The Fury — official pack description — store.steampowered.com