The Black Guard of Barad-dûr were considered the most fearsome of all the Orc breeds to march in Sauron's armies. Not only were the warriors of the Black Guard stronger than ordinary Uruk-hai, they were led by Captains whose loyalty to Sauron rendered them almost insensate to fear.
Each of the Black Guard of Barad-dûr was garbed in heavy chainmail, wielded an unusual but brutal sword, and wore a swaying cloak. Their helmet was rounded and mysterious, while their massive shields all displayed an evil, burning eye.
- Games Workshop - The Lord of the Rings: Strategy Battle Game