The Coloi, also known as the Coloi Rancor, was a type of mutant Rancor created by the Sith Lord Quorlac Fornayh. Over a thousand years before the Galactic Civil War, Fornayh planned to use the creature to overthrow the Sith Empire of his time. To this end, he began developing the Coloi through the means of Sith alchemy, using a fortress on the planet Yorgraxx. His first step in modifying the rancor was to improve its intelligence. He then gave it lighter bones and large wings, so that it could fly. Afterward, he replaced the skin with black metallic plating that could serve as armor. All the changes that he made were genetic, so that more Coloii could be bred, but by the time Fornayh had perfected the creature, the Sith Lord was close to death, so he placed it in stasis in his fortress. He