Step 1: The Thavnairian climate is bit more humid than Godbert is used to. Help him cool down by collecting 15 Coerthan Ice by completing the Battle on the Big Bridge Trial synced 15 times.

Step 2: Thanks to your efforts the temperature in the workshop is a lot better now. However Godbert muscles are feeling a bit stiff Help him limber up by collecting 15 Octopus Oil by defeating Ultros in The Dragon's Neck Trial synced 15 times.
Step2a: Apply Octopus Oil to Godbert.
Step2b: Apply Octopus Oil to Godbert again.
Step2c: Apply Octopus Oil to Godbert again!

Step 3: Godbert has been working furiously on your weapon but the ventilation in the workshop seems to be a bit lacking. Collect 15 Typhon Snouts by defeating Typhon in The Dragon's Neck Trial unsyced 15 times.
Step 3a: Affix Typhon snouts around the workshop.

Step 4: Godbert needs a special ingredient to infuse your weapon with magicks. Collect 15 Amdapori Sand by completing the Battle in the Big Keep Trial unsyced 15 times.

Step 5: The weapon is almost complete and Godbert just needs to put on the finishing touches to give the weapons some extra flourish. Collect 15 Crates of Hingashi Festival materials by completing the Kugane Ohashi Trial synced 15 times.