Warb Null was the guardian of the Sith Lord Freedon Nadd in the Tales of the Jedi comic book series.
Warb Null was originally Shas Dovas, a blacksmith from Onderon who had great hopes and dreams. A Sith spirit corrupted Null into making his own suit of armor and to be a servant of the Sith under the name Warb Null.
He was chosen to be Nadd's guardian and created a lightsaber for himself. Warb led the followers of Freedon Nadd into a rebellion against the Jedi Order and the Galactic Republic. Ulic Qel-Droma confronted Null and killed him with his lightsaber.