Below is a walkthrough for A Blacksmith’s Wish subquest in Valkyrie Elysium.
Obtained: Speak with the Spirit just past the sixth Storage Camp (Central Temple Bridge) during Chapter 6
Objective: Find the legendary sword
Follow the linear path. At the end, you’ll find a chest containing the Decaying Sword. Once you loot the sword, a cutscene will trigger and the quest will complete.
Rewards:
- Convergence III