The Clan of the Kraken cannot build Longship Docks as it knows how dangerous the seas can be. They have access to a new exclusive food building: The Fishery, allowing them to send fishermen on coastal zones to produce food.
The Hörgr is the second exclusive building for the Clan of the Kraken. You can assign female villagers to this building, turning them into Norns. You can assign 2 of them to this building (3 if upgraded).
When assigned to the Horgr, Norns will produce a new Kraken exclusive resource: The Wyrd. During the game, you can spend this Wyrd to use special abilities, insuring your dominance on your territory.