How to Get Girdle of Spectral Skulls in Throne & Liberty
You can obtain the Girdle of Spectral Skulls by defeating the Adentus Guild Boss in Throne & Liberty.
This is not a guaranteed drop, you may have to defeat Adentus multiple times to get the item.
This item can be crafted at the Senior Accessories Crafter in Stonegard Castle, if you have a Precious Lithograph: Girdle of Spectral Skulls. Item Lithographs are usually purchased at the Auction House.