En'rg-chan Rancor

The En'rg-chan Rancor was a subspecie of Rancor, having evolved on En'rg-ch in the Namelesennia system. First, all Rancors on En'rg-ch were just like any other Rancor. Eventually, the En'rg-chan Civil War turned the entire planet into a poisonous swamp. The Rancors gradually became mutated into green, somehow swampy, affected by the enviroment change. That meant the first En'rg-chan Rancors begun to appear around 4,653 BBY.

Many of the En'rg-chan Rancors were controlled by the En'rg-chan Sith Alliance, throught using the Force. Kaxs were forced to kill many of these controlled Rancors during the Battle of En'rg-ch.