Hssiss

Hssiss, or dark side dragons, were a lizard species with the ability to influence Force-sensitive beings around them. If bitten by a Hssiss, one would succumb to the effects of a dark side poison. Hssiss also had the ability to conceal themselves and become invisible, possibly doing so through the Force.

As creatures of the Force, they had a limited ability to mask their presence. Hssiss were drawn to suffering and carnage. After the Jedi Civil War and the devastation of the planet Korriban, they fed upon all the corpses left behind from the war, while the angry phantoms of the Sith&mdash;too weak to influence the sentient&mdash;took these Hssiss as thralls to their will, fending off all intruders who landed on the planet.

They were found on many planets throughout the Galaxy, including Korriban, Ambria, and Vjun. Their prevalance was probably the result of being brought with Sith armies in their many wars. Many scientists believed the Hssiss originated from the planet Stenness.

Glitch

 * In Star Wars:Knights of the Old Republic II: The Sith Lords the Dark Cave contains a infinite Hssiss spawn next to a dead Jedi. By looting the body Hssiss spawn. This is the basic level up glitch.
 * The Hssiss in the game are said to be dark sided but when using Force Sight they are glowing blue(alligned with the lightside) instead of red(alligned with the Dark Side).

Appearances

 * Tales of the Jedi: Knights of the Old Republic
 * Tales of the Jedi: The Sith War
 * Star Wars: Knights of the Old Republic II: The Sith Lords