What happens if Brigtir possesses Flakfatter?

[Eeveegirl1206]

In Part Four Assault on Hunting Lodge Seven where you have to hold Flakfatter tell the paperwork is sorted out.

A Demilich called Brigtir wants a body and only an evil humanoid will do.

So what happens in case the ritual is completed and Brigtir possesses Flakfatter?

The PCs cut a deal with Brigtir to give her Flakfatter in exchange for her help? Or she completes her ritual?

The chapter doesn’t offer any advice on what happens if the ritual is completed.

Because while reading it I imagined what would happen in the rest of the AP if the PCs get help from a Demi-Lich with a case of gender dystoria

[Naurgul]

I think the default assumption is that Flakfatter dies. There's too many things going against him:

• Constant attempts on this life by the fellow Twilight Four, even going so far as summoning a Lesser Death to get him.
  
• Reckless attacks by his comrades who gas the whole building indiscriminately.
  
• A demilich who wants to wear his body.
  
• Angry PCs many of whom will not think twice about ending him or letting him perish.
  

If they manage to have him survive all that, the PCs should be rewarded at least with some extra info on the T4. But in order to move the plot, Flakfatter being alive is not necessary at all. The next part of the plot involves the PCs and Starborn getting tricked by Vancaskerkin to approach the Harrow circus thing. If anything, Flakfatter surviving makes this part more awkward to implement as written.

With all that said, if the demilich succeeds, I would say her next goal would be to get rid of the PCs and failing that run away from them. The demilich is a demented creature. Her plans are insane and her grasp on reality tenuous. Even if she agrees to the trade you describe I doubt she would seriously be of any help to the PCs later on.

[Eeveegirl1206]

It’s not like Brigtir has anything against the PCs if they leave her alone.