This quest begins immediately after The Gutted Lamb. Now that you’ve dealt with Modron and rescued Tewdwr, it’s time to return to Glowecestre to witness the burning of the wicker man.
Find and Speak with Gunnar
To begin, you’ll need to speak with Gunnar in Glowecestre, who can be found at the dock south of the central stone bridge in the town. If you spared Cynon instead of killing him, next you will have to speak with him by the wicker man. Regardless, when you approach the wicker man a cutscene will follow, after which you’ll need to use a torch to set fire to the wicker man.
When the cutscene ends, the quest will be complete.