Tulak Hord was a Dark Lord of the Sith that ruled sometime during the early Sith Empire, after the use of lightsabers became prevalent. Hord wore a claustrophobic black mask, making him a fear-inspiring sight. 6a33v
There is some disagreement as to when precisely Tulak Hord lived. Hyperspace War.
It is unknown how Hord died, but his power was so considerable that a burial chamber was built in his honor in the the Jedi Exile visited his tomb, though the entrance was blocked and the tomb looted by the time the Exile arrived.
It was said of Hord that he was the greatest of the lightsaber dueling.
Inside the burial chamber, Revan discovered three lightsaber crystals: a violet crystal, a firkrann crystal, and a bondar crystal. These crystals may have been used by Tulak Hord in his lightsaber.
Jorak Uln went into hiding inside the tomb after he was deposed by Revan and his companions ed forces with Mekel and defeated Jorak.
Source: wookieepedia
