[Solved] Near "Hamlet of Stormbreach" sign, have key, blocked progress.

[Treehugger]

I seem to be stuck in the stone tunnels in the west part of the map. I have an iron key, and I think I see a blocked passage onwards in a 3x5 room, but I can't find a keyhole to progress.

Anyone know how to progress from here?

Btw, this is a room with two keyholes, that offer access to two tiny loot spots, having only one golden key, one can afaik only chose one door to open here. I've been fighting some green slimy things and what I guess are air elementals.

[Puzzlemint]

How hard did you look? There are two keyholes in the room with the blocked passage. You need to unlock both.

Also, those are Ice Guardians.

[Treehugger]

Oh, I did not know that. My bad. I thought that iron key wouldn't fit there.

Edit: Aah, now something is happening after pulling that lever in that second tiny room.