Sound of a Thousand Screams(Final Quest)

[Syndra]

I can not figure this one out. flipping back and forth between worlds is insane. I found the 3rd key Cleared all three floor but cant figure out out to unlock a couple of doors.
Any idea what I am misising . Still havent found the first 2 keys.

[Ogami]

One of the keys is hidden really well. Just follow this guide:
https://gameplay.tips/guides/3706-pathfinder-kingmaker.html

It got me through the final chapter.

[Li]

Are the locked doors all in the second floor? How many excactly? I can think of three locked doors there: 2 of them lead to the room where Nyrissa is, the other one is only accessable through the mist chamber in the basement.
Edit there is another area you can only reach over mist chamber or mist at second floor at first
Clearing the whole dungeons means that you also wiped out the Wriggling Man and the Knurly Witch which drop the other two keys.

[Syndra]

Thanks .
After playing on and off for a week. I stumbled upon finishing it. Still had 1 room I could not get to. I guess either I had to turn on and off the latern then zone out and come back in. Which is frustrating.