The Assassin at Large

The Assassin at Large is a main quest in. It starts automatically upon completing the second act.

Synopsis
Thaos has killed the duc and Lady Webb, and sent Defiance Bay into chaos. But Lady Webb saw where he intended to go next - to the city of Twin Elms. It is there the Watcher must go if there is any chance of catching up to him.

Walkthrough
Upon completion of the previous main storyline quest (The Hermit of Hadret House), head to Lady Webb and interact with her soul to learn that Thaos finally caught up with and killed her. You will automatically leave the burning Defiance Bay and land at the Aedelwan Bridge. Make your way eastwards through Stormwall Gorge, where the flood has now conveniently receded, allowing you to travel onward to Elmshore and then Hearthsong.

Deal with the Leaden Key assassins on the way. If you choose answer Aggressive 2, you can avoid a fight and take Naelde prisoner (assuming you have you have built the Dungeons at Caed Nua).

In Hearthsong, talk to Anamenfath Bethwl at the The Passage of the Six to gain access to Oldsong and Elms' Reach (you receive Twin Elms: Minor Positive).

Travel east to Elms' Reach, and talk to Sîdha and Rîhenwn who are standing in front of the entrance to Teir Evron on the east of the map. The quest will complete after the conversation.