Complete all of the following Abominable Stitching Quests:
Asset Extraction
Supply Chain
Shinies of Bastion
Things They Leave Behind
Field Training
Arboreal Tactics
Cure For All Ills
The Two Sides of History
Fighting Words
The Last Word
Old Stomping Grounds
Herbicidal Tendencies
Grinder
Baker's Dozen
Pie Not?
Drink to the Dead
A Brokered Deal
A Bountiful Haul
Something Old, Something Used
Corpse Run
Training Program
In A Bad Light
Scrounging for Scrolls
One Lich's Trash...
Say The Magic Words
Digging Around
Special Formula
Hands on Approach
Cut 'Em Down to Size
Give A Dog A Bone
Bring Your Own