Finding the identity of the Assassin's Creed Valhalla traitor during The Stench of Treachery quest isn't an easy job, which is likely the reason you've ended up on this page. There's a lot of investigating and detective work required in figuring out this conundrum in Assassin's Creed Valhalla, but if you've exhausted all avenues and you're not sure who the traitor is in The Stench of Treachery, or you simply can't be bothered to work it out for yourself, worry not. We're here to help with thie Assassin's Creed Valhalla traitor guide, but be wary of spoilers for the quest.
Figuring out who the traitor is isn't the only guide we've got for Assassin's Creed Valhalla:
Who is the traitor in The Stench of Treachery?
There are three people you can accuse of betraying Soma, and they're her three closest allies; Birna, Lif, and Galinn. There's reason to suspect each of them, but only one is the actual traitor.
If you don't care about becoming Sherlock Holmes for a short while, then you should know the traitor is Galinn. Accusing Galinn results in a cutscene where Soma slits his throat, but she is ultimately thankful for you finding the traitor. Since you got the correct suspect, Birna will also ask to join your camp at Ravensthorpe, so you can add her to your raiding team.
You can find this out for yourself by questioning each of the three suspects, where you'll find out that Lif had his yellow paint stolen. Head down the escape tunnel Soma dug inside the longhouse and you'll find drops of yellow paint throughout, all the way to an inlet where the invaders left their boats.
Go north-west from here to the Fens, where you'll eventually stumble upon some ambushed ships. Lif inscribed poetry on the side of each ship, so you can go through them and find Galinn's ship, which – surprise, surprise – has yellow paint on it.
Finding the ships is the hardest part of this quest, although personally, Galinn seemed the most suspicious to begin with. Congrats if you managed to solve the entire mystery yourself and commiserations if you accused Birna or Lif!
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