Frostwolf Tailoring Kit

The Frostwolf Tailoring Kit can drop from any mob in for tailors, but most likely to from Dorogg the Ruthless for the quest The Butcher of Bladespire at Bladespire Citadel. It starts Trega's Tailoring Kit, which begins a short chain to unlock the Tailoring Emporium blueprints for the Garrison.