Shroud of the Nathrezim

The Shroud of the Nathrezim are shoulderpads that belonged to the dreadlord Balnazzar.

They seem to have the same abilities as the Crown of Tyranny, either improves the accuracy and response of its wearer, but Mathias Shaw mentions that these are despicable things, and that he would not even wear them for all the gold of Azeroth.

Source
This item drops from Balnazzar in the Stratholme Main Gate wing.