Spoilers: The Dolgan ritual and Nightmaw's origin; no Dark Ritual outcome.

Who he is in Total War
Sayl leads the Dolgan at Mountain's End, a four-region province, for Norsca. Sayl – Tides of Torment unlocks him for Immortal Empires and custom battles. The original Norsca pack remains the unlock for Wulfrik and Throgg. Beorg Bearstruck is the legendary hero in Sayl's purchase, and he strengthens Marauder Bearmen. He is not a second start.
Sayl is a shaman-sorcerer of Shadows and Heavens. His skill line pushes magic for himself and for the army. A lingering effect of the broken ritual can grant the army magical attacks, weapon strength, and spell resistance. Nightmaw, his three-headed spawn, is summoned in battle, and parts of the skill line add further casts. The December 2025 answers left that summon as the way Nightmaw enters a battle.
Schalkain, seven apprentices, one sabotage
The Meet Sayl article gives the title a scene. Sayl was one of seven sorcerous apprentices who guided the Dolgan. He manipulated his master, Schalkain the Vile, into a daemonic ritual. At the crescendo he sabotaged it. A wild gyre of Chaos followed. The store page states the result that matters in game: the peers were fused into Nightmaw, a monstrous companion with a mindless loyalty. Sayl rose by that lie. The bundle page shortens it the same way: he betrayed Schalkain and bound the followers into the spawn.
Wulfrik and Throgg can chase the favour of individual gods. Sayl builds undivided altars for a Dark Ritual instead. Manipulations are the campaign mirror of the personality. He disrupts enemy logistics, throws settlements into disorder, and whispers lies that cut diplomatic ties. The Q&A notes that the system had to carry treachery without becoming an unchecked weapon against other players in a multiplayer campaign. The single-player lord is still the schemer.
A Dolgan chief beside the other northmen
Tamurkhan remains a Nurgle legendary lord with his own chieftains. Sayl's campaign is a Norscan start at Mountain's End: Manipulations, a Dark Ritual, and Nightmaw summoned in battle. He is not a seat in that Nurgle host, and he is not unlocked by the original Norsca pack.
Norsca is outside Archaon's Update 9.0 subjugation list. The Dolgan are not confederated into the Warhost by that rule. Wulfrik hunts champions by sea. Throgg spends Trollkind on a troll country. Sayl is the shaman whose lies broke Schalkain's ritual.
Sayl the Faithless: gameplay and availability · More character stories
Sources
- Tides of Torment: Meet Sayl — Total War — totalwar.com
- Sayl – Tides of Torment — Total War — totalwar.com
- Tides of Torment — Total War — totalwar.com
- Immortal Empires DLC Ownership Guide — SEGA — support.sega.com
- Sayl – Tides of Torment — official pack details — store.steampowered.com