Unlike Cassardis, Gran Soren is a large city, with multiple vendors and inns.
The city is inhabited by rich people and merchants.
The location is in fact a stronghold, well defended by impenetrable walls, created with the purpose of protecting its residents.
Even if the city features numerous buildings, when we arrive we notice that most doors are closed.
Only few houses can be explored looking for materials, and some gold.
Ser Mercedes will take our trophy to the duke, and we will trigger a new story quest, named A Matter of Myrmidons; however at this point it is a good idea to explore the Capital and activate/complete as many side-quests as we can.
After we finish all quests, available we can advance the main story, by playing A Matter of Myrmidons.
Some of the side-quest available in Gran Soren can be activated by checking the notice board in Arsmith’s Alehouse, and later the one located in Gran Soren Union Inn.