A nasty monster is destroying the natural beauty of Swan Island. This cannot be tolerated!
This bounty is available to complete after obtaining Tengri.
The Dusty Fug is found on a small isle west of Swan Island, which is on its whole located northwest of Autumnia and northeast of Ding Dong Dell. The fight shouldn't be too hard, but if you have any difficulty with the creature, definitely consider using storm elemental tricks.
Defeat it and you'll complete the bounty hunt, return to the Swift Solutions to claim your reward.