A family of monsters have invaded the Sleighbell Isles northeast of the Winter Isles. They cannot be allowed to stay!
This bounty is available to complete after defeating Cap'n Crossbones and arriving at Yule.
Your target is on the Sleighbell Isles to the northeast of the main continent, so have Tengri drop you off in the northern center of the island, where you'll find the Papa Sasquash. Make sure to save before taking him on.
Work on getting rid of the Sasquish first, then the Sasquash, then the Papa. Having the Blazing Blades that you can purchase from Yule help out immensely here, as well as any fire-based tricks your familiars know.
Defeat them and you'll complete the bounty hunt, return to the Swift Solutions to claim your reward.