Sith wyrm

The Sith wyrm was originally an exogorth altered through Sith alchemy by the Dark Lord of the Sith Naga Sadow and designed as a guardian.

The ancient Massassi worshiped the beast as a god until it was killed by Exar Kun a millennia later, who did so to impress the spirit of Freedon Nadd. Unknown to either the Massassi shaman Zythmnr or Exar Kun, Nadd was engineering this conflict to manipulate Kun; Kun could only defeat it by using the power of a Sith amulet and committing himself more fully to the dark side of the Force. It was learned later that the creature was originally an infant exogorth that had attached itself to Sadow's battleship. Failing to tame the creature and seeing no other use for it, Sadow opted to alchemize it into the first Sith wyrm.

As the Sith wyrms were later hunted by the Jedi during the Great Hunt, it is evident that the creature was not the only one of his kind.

• The Dark Side Sourcebook
• Knights of the Old Republic Campaign Guide
• The Complete Star Wars Encyclopedia
• Jedi Academy Training Manual
• Book of Sith: Secrets from the Dark Side