The missing Councilor
The party has been ordered/asked (depending on how well you were liked by your lord) to assist in finding the missing Councilor of Torch, Khonnir Baine. He went missing two days before the adventure started, in an expedition into the newly-discovered caverns below Black Hill. He went in there to find out why the towns namesake went out.
So far the group have investigated Khonnir’s home, where they found a badly mangled and malfunctioning golem-like construct (which Ser Rex bifurcated). It had been brought out by Councilor Baine on a previous expedition. He found it “next to a wall of grey metal” according to Val, Khonnir’s daughter and apprentice.