OK - I've screwed up. I've entered a room in the Nalia's keep and upset some Golems. (Didn't read the hints first)
I've got 2 crushing weapons which I've given to my strongest 2 team members (I thought blunt weapons would work) but these are not effective against the iron golem though. Can't sneak in now because he is "red" what weapon will take him out.
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Regret nothing.