When you arrive in a strange land in FF16's The Rising Tide, you'll meet many of the locals, including the blacksmith.
Final Fantasy 16: The Rising Tide Review – The Final Verdict
While you can change Clive's weapon appearance to make it look cooler, the new Curtana sword skin won't make it any more powerful in Final Fantasy 16's The Rising Tide DLC. The only way to upgrade weapons in FF16 is through a blacksmith, and since you'll be far away from your trusty smith in the Hideaway, befriending Haven's local blacksmith is the only way out. That's easier said than done, given your position as a strange, dark-haired outsider. Trust won't come easy with Haven's townsfolk, but they're not made of steel. Here's how to unlock the Blacksmith Shop in Haven in Final Fantasy 16
The quest to unlock the blacksmith in Haven is called It's the Thought that Counts, and is only available after you sail to Mysidia with Shula in Final Fantasy 16's The Rising Tide DLC. Here's how to start the quest:
To complete It's the Thought that Counts in Final Fantasy 16, follow these steps: