Go to Sulcher's Pass and speak to Felix de Grosbois. Use one of the dialogue options to get a golem control rod from him and he'll tell the Warden about the Village of Honnleath, where a golem resides. This village will be added to the world map allowing the Warden and their companions to travel there. Talking to the merchant and receiving the Golem Control Rod concludes this quest and it will start a new quest called The Golem in Honnleath.
A Golem Control Rod and the start of The Golem in Honnleath quest.